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  • Numerical Unsteady Flow Analysis of a Turbine Stage With ...

    The work is part of the predesign study of a high-pressure subsonic turbine for a rocket engine turbopump. The pressure level in such turbines can be remarkably high (in this case 54 MPa inlet total pressure). Hence, large unsteady rotor blade loads can be expected, which impose difficult design requirements.

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  • Dental Drill - an overview

    Dental burs have revolutionized the dentistry field and are used for cutting hard tissues such as bone or tooth [1,4,6–9]. They are normally made of stainless steel, diamond grit or particles, and tungsten carbide and fitted to a dental drill incorporating an air turbine. The dental bur was developed <300 years ago [8] and still widely used.

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  • Scalar Diffusion Equation-Based Model to Predict 2 ...

    One-dimensional laterally averaged adiabatic film cooling effectiveness η ¯ l a t-based correlations have been widely employed in the cooling design of the modern gas turbine and aero-engine; however, the flow field of the discrete film cooling is fully three dimensional, and thus, the cooling effectiveness distribution on the solid surface is two dimensional.

    Get Price
  • Mainstream Aerodynamic Effects Due to Wheelspace Coolant ...

    Parameters such as the total pressure coefficient, wake width, and three-dimensional velocity field show significant local changes. It is clear that the cooling air disturbs the inlet end-wall boundary layer to the rotor and modifies secondary flow development thereby resulting in large changes in turbine exit conditions.

    Get Price
  • (PDF) CFM56-3 Turbofan Engine Description

    Figure 1: McDonnell Douglas DC-3 with CFM56 engines. 3 f1.1 Overview and Main Parameters The CFM56-3 is a dual-shaft engine with a thrust rating between 18,500 and 23,500 lbs and compression ratio of 27.5-30:1. This particular variant has a bypass ratio of 6:1 with a 60- inch fan diameter, and a dry weight of 4,300 lbs.

    Get Price
  • Analysis of a Quasi-Two-Dimensional Flamelet Model on a ...

    Three-feed combustion systems in which fuel gas, oxygen, and diluent ( \hbox {CO}_{2} CO 2 ) are issued into a combustor are key components to realize an oxy-fuel type gas turbine in a zero-emission plant. Yet, simulations of such systems using mixture fraction-based models are difficult, since multiple mixture fractions are required to describe the system. In this study, large-eddy ...

    Get Price
  • Porous Media Compressed-Air Energy Storage (PM-CAES ...

    Expansion in the supply of intermittent renewable energy sources on the electricity grid can potentially benefit from implementation of large-scale compressed air energy storage in porous media systems (PM-CAES) such as aquifers and depleted hydrocarbon reservoirs. Despite a large government research program 30 years ago that included a test of air injection and production in an aquifer, and ...

    Get Price
  • Heat Transfer Characteristics Analysis on a Fully Cooled ...

    The objective of this experimental investigation was to determine the cooling performance of a fully cooled vane with 18 rows of cylinder cooling holes. The exit Reynolds number in the wind tunnel normalized by the true chord was 500,000 with an inlet turbulence intensity of 15%.

    Get Price
  • Ultrafast lasers—reliable tools for advanced materials ...

    The unique characteristics of ultrafast lasers, such as picosecond and femtosecond lasers, have opened up new avenues in materials processing that employ ultrashort pulse widths and extremely high ...

    Get Price
  • Effector for automated direct textile placement in rotor ...

    The layout of the DTP effector, Figure 4, consists of the support structure that accommodates the sub-assemblies of material storage and draping unit as well as additional components for monitoring and controlling actuators and sensors.Owing to the very long cuttings used, the material storage is implemented as a cylindrical winding core and forms the central element on which the cuttings can ...

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  • 9HA Gas Turbine

    A standout honor in Malaysia. Earlier this year, Southern Power Generation’s gas-fired Track 4A Power Plant went online with 1,440 MW. The plant, located in Pasir Gudang, an industrial city at the southern tip of Malaysia, consists of two generating blocks, each equipped with a 9HA.02 gas turbine and an STF-D650 steam turbine, driving a W88 generator, and, for the first time installed in an ...

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  • Dental Drill - an overview

    Dental burs have revolutionized the dentistry field and are used for cutting hard tissues such as bone or tooth [1,4,6–9]. They are normally made of stainless steel, diamond grit or particles, and tungsten carbide and fitted to a dental drill incorporating an air turbine. The dental bur was developed <300 years ago [8] and still widely used.

    Get Price
  • Comparison of Endwall Loss Reduction Techniques in a High ...

    The development of techniques that reduce the losses in the endwall region is an important area of research as it supports an increase in the turbine design space through the use of higher lift blade designs while maintaining high efficiency.

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  • (PDF) 3D printing in dentistry - ResearchGate

    Three-dimensional (3D) printing in digital dentistry is one of the major developments in dentistry. It replicates the dental …

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  • A Thermal Mixing Scheme for Portable Gas Turbines

    This is the focus of the present paper. The compact and small-scale architecture of such gas turbine engines poses major challenges in the thermal management as the required cooling mass flow for portable operation is relatively large and the flow mixing length is short and constrained by package size considerations.

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  • Multi-source and multi-fault condition monitoring based on ...

    The monitoring of mechanical equipment systems contains an increasing number of complex content, expanding from traditional time, and frequency information to three-dimensional data of the time, space, and frequency information, and even higher-dimensional data containing subjects, experimental conditions. For high-dimensional data analysis, traditional decomposition methods such as Hilbert ...

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  • Dimensional stability of short fibre reinforced flowable ...

    Fibre-reinforced dental composites are proven to have superior mechanical properties in comparison with micro/nano/hybrid filled composites. However, the addition of small quantities of short ...

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  • Heat transfer research on gas turbine airfoils at NASA GRC ...

    Heat transfer downstream is better than that without bleed but not as good as with uniform bleed. Near holes 4 and 5, heat transfer is similar to uniform bleed away from the hole, but is higher near the hole. By comparing the distributions near holes 4 and 5, it appears that the decreasing bleed case gives better heat transfer enhancement. 6.

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  • Monopile Foundation - an overview

    K. Lesny, W. Richwien, in Wind Energy Systems, 2011 Monopiles. With a monopile foundation the design parameters are the diameter, the embedment length and the wall thickness. The standard design method is the p-y method which is based on the model of the beam on elastic foundation, idealizing the soil as a series of independent springs (see Fig. 16.3).In this model the nonlinear soil behaviour ...

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  • DH103 Quiz #4 (Chapters 24-27 & 29-32) Flashcards

    Dental Radiography Quiz #4 Chp 24-27 & 29-32 Learn with flashcards, games, and more — for free.

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  • Numerical Unsteady Flow Analysis of a Turbine Stage With ...

    The work is part of the predesign study of a high-pressure subsonic turbine for a rocket engine turbopump. The pressure level in such turbines can be remarkably high (in this case 54 MPa inlet total pressure). Hence, large unsteady rotor blade loads can be expected, which impose difficult design requirements.

    Get Price
  • Dental Drill - an overview

    Dental burs have revolutionized the dentistry field and are used for cutting hard tissues such as bone or tooth [1,4,6–9]. They are normally made of stainless steel, diamond grit or particles, and tungsten carbide and fitted to a dental drill incorporating an air turbine. The dental bur was developed <300 years ago [8] and still widely used.

    Get Price
  • Scalar Diffusion Equation-Based Model to Predict 2 ...

    One-dimensional laterally averaged adiabatic film cooling effectiveness η ¯ l a t-based correlations have been widely employed in the cooling design of the modern gas turbine and aero-engine; however, the flow field of the discrete film cooling is fully three dimensional, and thus, the cooling effectiveness distribution on the solid surface is two dimensional.

    Get Price
  • Mainstream Aerodynamic Effects Due to Wheelspace Coolant ...

    Parameters such as the total pressure coefficient, wake width, and three-dimensional velocity field show significant local changes. It is clear that the cooling air disturbs the inlet end-wall boundary layer to the rotor and modifies secondary flow development thereby resulting in large changes in turbine exit conditions.

    Get Price
  • (PDF) CFM56-3 Turbofan Engine Description

    Figure 1: McDonnell Douglas DC-3 with CFM56 engines. 3 f1.1 Overview and Main Parameters The CFM56-3 is a dual-shaft engine with a thrust rating between 18,500 and 23,500 lbs and compression ratio of 27.5-30:1. This particular variant has a bypass ratio of 6:1 with a 60- inch fan diameter, and a dry weight of 4,300 lbs.

    Get Price
  • Analysis of a Quasi-Two-Dimensional Flamelet Model on a ...

    Three-feed combustion systems in which fuel gas, oxygen, and diluent ( \hbox {CO}_{2} CO 2 ) are issued into a combustor are key components to realize an oxy-fuel type gas turbine in a zero-emission plant. Yet, simulations of such systems using mixture fraction-based models are difficult, since multiple mixture fractions are required to describe the system. In this study, large-eddy ...

    Get Price
  • Porous Media Compressed-Air Energy Storage (PM-CAES ...

    Expansion in the supply of intermittent renewable energy sources on the electricity grid can potentially benefit from implementation of large-scale compressed air energy storage in porous media systems (PM-CAES) such as aquifers and depleted hydrocarbon reservoirs. Despite a large government research program 30 years ago that included a test of air injection and production in an aquifer, and ...

    Get Price
  • Heat Transfer Characteristics Analysis on a Fully Cooled ...

    The objective of this experimental investigation was to determine the cooling performance of a fully cooled vane with 18 rows of cylinder cooling holes. The exit Reynolds number in the wind tunnel normalized by the true chord was 500,000 with an inlet turbulence intensity of 15%.

    Get Price
  • Ultrafast lasers—reliable tools for advanced materials ...

    The unique characteristics of ultrafast lasers, such as picosecond and femtosecond lasers, have opened up new avenues in materials processing that employ ultrashort pulse widths and extremely high ...

    Get Price
  • Effector for automated direct textile placement in rotor ...

    The layout of the DTP effector, Figure 4, consists of the support structure that accommodates the sub-assemblies of material storage and draping unit as well as additional components for monitoring and controlling actuators and sensors.Owing to the very long cuttings used, the material storage is implemented as a cylindrical winding core and forms the central element on which the cuttings can ...

    Get Price
  • Dental Supplies and Medical Supplies - Henry Schein

    In 1932, at the height of the Depression, a pharmacist named Henry Schein started our company with the belief that we can fulfill our responsibilities as a corporate citizen by giving back to the communities we serve. Ever since then, we have pursued the ideal of 'doing well by doing good.' This spirit of individuals helping society is ...

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  • Press Center

    Researchers from the AI Policy Forum — a global effort convened by researchers from MIT — will present their initial policy recommendations aimed at managing the effects of artificial intelligence and building AI systems that better reflect society’s values.

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  • 'Holey' graphene for energy storage: Charged holes in ...

    University of California - San Diego. (2015, April 22). 'Holey' graphene for energy storage: Charged holes in graphene increase energy storage capacity. ScienceDaily. Retrieved July 25, 2021 from ...

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  • Experimental and numerical investigation of stability and ...

    This paper reports experimental and numerical study of stability and combustion characteristics of premixed oxy-methane flames with hydrogen-enrichment (CH 4 –H 2 /O 2 –CO 2 flames) in a model multi-hole burner for clean energy production in gas turbines. The combustor lean blow-out (LBO) limit was presented on an equivalence ratio (Ø) - hydrogen fraction (HF: volumetric fraction of H 2 ...

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  • Engineering Bernoulli Equation - Clarkson University

    liquid1.93 /slug ft 3 from a storage tank, and discharge it at a rate of 0.75 cubic feet per second into the top of an absorber. The inlet to the absorber is located 25 feet above the free surface of the liquid in the storage …

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  • (PDF) CFM56-3 Turbofan Engine Description

    Figure 1: McDonnell Douglas DC-3 with CFM56 engines. 3 f1.1 Overview and Main Parameters The CFM56-3 is a dual-shaft engine with a thrust rating between 18,500 and 23,500 lbs and compression ratio of 27.5-30:1. This particular variant has a bypass ratio of 6:1 with a 60- inch fan diameter, and a dry weight of 4,300 lbs.

    Get Price
  • Removal of non-CO2 greenhouse gases by large-scale ...

    Large-scale atmospheric removal of greenhouse gases (GHGs) including methane, nitrous oxide and ozone-depleting halocarbons could reduce global warming more quickly than atmospheric removal of CO 2.Photocatalysis of methane oxidizes it to CO 2, effectively reducing its global warming potential (GWP) by at least 90%.Nitrous oxide can be reduced to nitrogen and oxygen by photocatalysis ...

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  • X-ray computed tomography

    X-ray computed tomography (CT) can reveal the internal details of objects in three dimensions non-destructively. In this Primer, we outline the basic principles of CT and describe the ways in ...

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  • Interproximal space - definition of interproximal space by ...

    Define interproximal space. interproximal space synonyms, interproximal space pronunciation, interproximal space translation, English dictionary definition of interproximal space. n. 1.

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  • 25 Small Space Storage Hacks That Will Change Your Life ...

    Apartments are often big on charm but short on storage space. Fortunately, there's a storage hack to suit every single room, many of which take mere minutes and few materials to implement. If you're sick of tripping over unnecessary clutter, check out this list of 25 storage hacks that'll have your space feeling twice its size in no time!

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  • 'Holey' graphene for energy storage: Charged holes in ...

    University of California - San Diego. (2015, April 22). 'Holey' graphene for energy storage: Charged holes in graphene increase energy storage capacity. ScienceDaily. Retrieved July 25, 2021 from ...

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  • Efficient Optimization Design Method Using Kriging Model ...

    Efficient Optimization Design Method Using Kriging Model. Shinkyu Jeong , Mitsuhiro Murayama and. Kazuomi Yamamoto. Shinkyu Jeong. Japan Aerospace Exploration Agency, Tokyo 182-8522, Japan. Search for more papers by this author. , Mitsuhiro Murayama.

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  • Aerodynamic Optimization of Turboprop Turbine Blades Using ...

    As an application, a 4-stage low pressure turbine for a turboprop engine is designed by multi-streamline analysis. 2D mid-span cross-sections from both rotor and stator are produced by the Bezier-spline based airfoil-generator. The basis tool requires input parameters as leading and trailing edge blade angles and maximum thickness position.

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  • A novel 3D printed mechanical actuator using centrifugal ...

    For each turbine, three unbalances with different weights (m A1 = 1.2 g, m A2 = 2.3 g, and m A3 = 4.5 g (turbine A) and m B1 = 3.0 g, m B2 = 4.3 g, and m B3 = 8.6 g (turbine B)) were constructed from polyamide to investigate their influence on the generated acceleration. The unbalances were 3D printed, had a semi-cylindrical shape and could be ...

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  • Codes & Standards - ASME

    Setting the Standard for Over 125 Years. ASME offers a continuously evolving portfolio of standards across a wide range of topics, including pressure technology, power plants, elevators, construction equipment, piping, nuclear components, and many more. Committee meetings status in regards to Coronavirus (COVID-19)

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  • (PDF) CFM56-3 Turbofan Engine Description

    Figure 1: McDonnell Douglas DC-3 with CFM56 engines. 3 f1.1 Overview and Main Parameters The CFM56-3 is a dual-shaft engine with a thrust rating between 18,500 and 23,500 lbs and compression ratio of 27.5-30:1. This particular variant has a bypass ratio of 6:1 with a 60- inch fan diameter, and a dry weight of 4,300 lbs.

    Get Price
  • X-ray computed tomography

    X-ray computed tomography (CT) can reveal the internal details of objects in three dimensions non-destructively. In this Primer, we outline the basic principles of CT and describe the ways in ...

    Get Price
  • Dimensionally and environmentally ultra-stable polymer ...

    The quest to develop materials that enable the manufacture of dimensionally ultra-stable structures for critical-dimension components in spacecraft has led to much research over many decades and ...

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  • Highly absorbent sponge - Nice-Pak Products, Inc.

    What is claimed is: 1. A highly absorbent sponge for use as a dental sponge in oral cavities comprising: means so less storage space than normal is required when in non-use and yet is greatly expandable during use so as to absorb three to five times the fluid and also to provide greater separation of oral tissues including;

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  • 15 Comfortable Yet Chic Sectional Sofas Under $1,000

    Here, 15 beautiful sectional sofas you can snap up for under 1,000. You're welcome. 1. World Market Noelle Sofa and Ottoman, 799.99. This sleek oatmeal-hued sofa is great for entertaining friends and also cozy enough to curl up on with a book.

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  • About Arcam

    Patent describing the principle of melting electrically conductive powder, layer by layer, with an electric beam, for manufacturing three-dimensional bodies. 1997 Arcam AB was founded and the company continued the development on its own, with the objective to further develop and commercialize the fundamental idea behind the patent.

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  • Endodontic applications of 3D printing - Anderson - 2018 ...

    2003) and a molar with three distal roots (Lee et al. 2006). Kfir et al. used a clear tooth replica to simulate ideal access, instrumentation and obturation preoperatively in a complex type 3 dens invaginatus scenario, before treating the clinical case. In an evaluation of dental …

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  • Ansys

    Ansys engineering simulation and 3D design software delivers product modeling solutions with unmatched scalability and a comprehensive multiphysics foundation.

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  • English (USA)

    The full range supplier of pumps and pump solutions. As a renowned pump manufacturer, Grundfos delivers efficient, reliable, and sustainable solutions all over the globe. Step into our world.

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  • Journal of Physics: Conference Series, Volume 1303, 2019 ...

    The two-dimensional Navier-Stokes equations were solved using the density-based algorithm and strongly-coupled with the heat-transfer equation. Three typical Reynolds numbers defined by rib height and Mach numbers were set at 500, 750, 1000 and at 0.2, 0.3, 0.4, respectively.

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  • SANY SY365H - SANY - PDF Catalogs

    New-generation Super Hydraulic Excavator for Mining Selling Points SY365H-10 is a new-generation 30-40T super excavator product for mining produced by SANY Heavy Machinery, and targets to improve customer’s investment return. As compared with competitor brands, it has the advantages of “super excellent performance, super high adaptability, super long service life and super lower ...

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  • Cheap Plastic Storage Boxes

    Plastic Storage Boxes. Plastic storage boxes are a reliable, sturdy and simple way to store your items safely. Keep all of your items in one place and keep a clutter-free home! Safe to use in the bedroom, living room, attic, basement, or outdoors, our plastic storage boxes with secure lids will help protect your items from the elements.

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  • Research and Development of a High Performance Axial ...

    flow, see Fig. 4. Three-dimensional designs such as sweep and bow are applied to each of the stages to raise the …

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  • How Does OSHA Define a Confined Space? - Fall Protection Blog

    The space must “have limited or restricted means for entry or exit” AND; The space must not be “designed for continuous employee occupancy”. Notice the stress I placed on the word “AND”. In order for a space to meet OSHA’s definition of a Confined Space, it must meet all three …

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  • Free End Table Plans - The DIY Hubs

    Drill 9 pocket holes (three on three sides as shown) on each of the 11.75″ x 13″ 3/4″ boards using your Kreg Jig. Orient the legs properly as shown below and attach the boards between the legs making sure that the board is flush with what will become the outside of the end table using wood glue and 18 – 1 1/4 pocket hole …

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  • Three-View, Plan View and Elevation View Drawings

    three views or all of the hidden lines and the exact outside shape of an object. If space is at a premium, the draftsman may use symbols to represent objects such as valves or pipe fit- tings. Y8'' S.P.S. Supply to Floor When Specified NOTE: This Water Closet is Designed to Rough-in at a Min. Dimension …

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  • Advancements in metal 3D printing - Roland Berger

    where PBF-L is located within this three-dimensional cube. Clearly, much space remains in the cube – space that can potentially be occupied by other technologies, as we discuss below. A Compared to conventional manufacturing, PBF-L is still very expensive. A significant gap exists with regard to costs, especially in high-volume applications ...

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  • Storage Cabinets Singapore

    The five-shelves unit can serve as a perfect storage solution for your garage, office, work shed .. 199.00 119.00. Add to Cart. Add to Wish List. Add to Compare. Book Cabinets BCN1130B (available on August 2021) Product and features Compressed wood material 2 tones colour (dark oak/white wash) .. 158.00 120.00. Add to Cart.

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  • FLUID MECHANICS - Ankara Üniversitesi

    components with large frictional losses, and thus it is suitable for the use of the Bernoulli equation. We take point 1 to be at the free surface of gasoline in the tank so that P 1 = P atm (open to the atmosphere) V 1 ≅ 0 (the tank is large relative to the outlet), and z 1 = 0.3 m and z 2 = 0 (we take the reference level at the hole. Also, P ...

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  • Danesh TAFTI

    Danesh Tafti develops methods to solve the equations that govern fluid flow with heat and mass transfer on supercomputers. His research uses methods in High Performance Parallel Computing Large ...

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  • Salih AKOUR

    Stress concentrations associated with circular holes in pure shear-loaded plates can be reduced by up to 13.5 per cent by introducing elliptical auxiliary holes along the principal stress directions.

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  • 3DPrint.com

    DED and Large-Format Additive Manufacturing Markets: 2021-2030. June 28, 2021 . Report # SMP-AM-DED2021 …

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  • Sci-Hub

    The Sci-Hub project supports Open Access movement in science. Research should be published in open access, i.e. be free to read. The Open Access is a new and advanced form of scientific communication, which is going to replace outdated subscription models.

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  • Confined Space Entry Policy » Environmental Health ...

    A confined space is an area that is large enough to bodily enter and perform work, has limited means of entry or exit and is not intended for continuous occupancy. All three of these criteria must apply for an area to be classified as a confined space.

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  • Proceedings of the Institution of Mechanical Engineers ...

    Martensite was the predominant phase in the three zones when the ageing temperature was lower than 500 °C whereas a large amount of reverted austenite occurred in three zones on ageing above 500 ...

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  • Endodontic applications of 3D printing - Anderson - 2018 ...

    2003) and a molar with three distal roots (Lee et al. 2006). Kfir et al. used a clear tooth replica to simulate ideal access, instrumentation and obturation preoperatively in a complex type 3 dens invaginatus scenario, before treating the clinical case. In an evaluation of dental …

    Get Price
  • GAS TURBINES IN SIMPLE CYCLE & COMBINED CYCLE APPLICATIONS ...

    This gas turbine is used in 60Hz power generation service. Fig. 4. Siemens V84.3A, 60Hz gas turbine. Note partial hybrid burner (24 burners) ring Fig. 5. The basic gas turbine cycle (Source: The Aircraft Engine Book, Rolls Royce UK) The basic gas turbine cycle is illustrated (PV and T-s diagrams) in Figure 5.

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  • Scotch-Brite™ SST Deburring Wheel

    The Scotch-Brite™ SST Deburring Wheel is a higher density convolute wheel designed to remove sharp burrs and radius edges from stainless steel, titanium and other demanding alloys. Its conformability makes it ideal for use on intricate shapes and contours.

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  • Journal of Physics: Conference Series, Volume 1303, 2019 ...

    The two-dimensional Navier-Stokes equations were solved using the density-based algorithm and strongly-coupled with the heat-transfer equation. Three typical Reynolds numbers defined by rib height and Mach numbers were set at 500, 750, 1000 and at 0.2, 0.3, 0.4, respectively.

    Get Price
  • Lecture 1 INTRODUCTION TO HYDRAULICS AND PNEUMATICS

    The relative spatial position of the prime mover (e.g., turbine) is fixed. An example of pure hydrodynamics is the conversion of flow energy in turbines in hydroelectric power plants. In oil hydraulics, we deal mostly with the fluid working in a confined system, that is, a hydrostatic system. 1.5 History of Fluid Power

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  • Research and Development of a High Performance Axial ...

    flow, see Fig. 4. Three-dimensional designs such as sweep and bow are applied to each of the stages to raise the …

    Get Price
  • Small - Wiley Online Library

    The Co Ni P hollow nano-millefeuille/black phosphorus quantum dots photocatalyst serves as an electron harvester and photonic “black hole” achieves CO 2-to-CH 4 …

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  • Cheap Plastic Storage Boxes

    Plastic Storage Boxes. Plastic storage boxes are a reliable, sturdy and simple way to store your items safely. Keep all of your items in one place and keep a clutter-free home! Safe to use in the bedroom, living room, attic, basement, or outdoors, our plastic storage boxes with secure lids will help protect your items from the elements.

    Get Price
  • Sensing of Tooth Microleakage Based on Dental Optical ...

    This study describes microleakage sensing based on swept-source optical coherence tomography (SS-OCT). With a handheld scanning probe, the SS-OCT system can provide portable real-time imaging for clinical diagnosis. Radiography is the traditional clinical imaging instrument used for dentistry; however, it does not provide good contrast images between filling material and the enamel of treated ...

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  • Free End Table Plans - The DIY Hubs

    Drill 9 pocket holes (three on three sides as shown) on each of the 11.75″ x 13″ 3/4″ boards using your Kreg Jig. Orient the legs properly as shown below and attach the boards between the legs making sure that the board is flush with what will become the outside of the end table using wood glue and 18 – 1 1/4 pocket hole …

    Get Price