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  • (PDF) Three-Dimensional Performance Analysis of a Radial ...

    2021-3-5 · Three-Dimensional Performance Analysis of a Radial–Inflow Turbine for Ocean Thermal Energy Conversion System March 2021 Journal of Marine Science and Engineering 9(3):287

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  • Characterizing the performance of dental air-turbine ...

    2008-1-1 · The dental air-turbine handpiece rapidly gained widespread acceptance by the dental profession after its introduction in the late 1950s and it continues to be used as the main means of carrying out cutting work in clinical dental practice, whether of tooth tissue or restorative materials.

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  • Optimum Design of the Dental Air-Turbine Handpiece

    2020-1-22 · An air-turbine and associated air supply tube was optimized as a dental air-turbine handpiece system. The system consists of an air-turbine with an impeller and a housing, and an air supply tube which supplies compressed-air to the air-turbine. The flow characteristics of the dental air-turbine handpiece system were investigated using ANSYS CFX. The study aimed to find the …

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  • Three-dimensional wind turbine simulation and analysis

    2020-10-13 · Three-dimensional wind turbine simulation and analysis by Jennifer Ann Cordero A thesis submitted to the graduate faculty in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Major: Mechanical Engineering Major Professors: R. …

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  • Three-dimensional optimal design of a cooled turbine ...

    Cooling technology is widely applied in modern turbines to protect the turbine blades, and extracting high-pressure cooling air from a compressor exerts a remarkable influence on the gas-turbine performance. However, the three-dimensional optimal design of a turbine in modern industrial practice is usually carried out by pursuing high component efficiency without considering possible changes ...

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  • Detection of Three-Dimensional Parameter of Defects for ...

    2019-11-11 · Gas turbine is one of the most efficient heat-to-power conversion machine and widely used in power plant, large vessel, etc. As the core parts responsible for the energy conversion in gas turbine, turbine blades are typically manufactured using the investment casting process and bear quite heavy loads in harsh environment [].Hence, in the manufacturing and service processes of gas turbine ...

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  • Study on an innovative three-dimensional wind turbine

    An original analytical three-dimensional wind turbine wake model is presented. • The expression of wake model is simple and its computational cost is low. • The accuracy of wake model is validated by the wind tunnel measured data. • The wake model has a good accuracy beyond the 5D downwind of distance. •

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  • JMSE

    Turbine is one of the key components of the ocean thermal energy conversion system (OTEC), and its aerodynamic performance and geometric dimension affect the performance of the system directly. This paper proposes a design method for the radial inflow turbine suitable for the ocean thermal energy conversion based on the parameter optimization of the ocean thermal energy conversion system.

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  • Advanced Three-Dimensional Aerodynamic Design for

    2021-5-13 · |2. Three-dimensional end wall for the high load turbine The increase in the secondary flow loss due to an increase in flow turning angle, a byproduct of the increased load, causes a drop in aerodynamic performance. To reduce the losses due to secondary flow, a three-dimensional end wall design (axisymmetric end wall contouring) was

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  • (PDF) Accuracy of three-dimensional printing for ...

    Three-dimen sional (3D) printing is a r ecent technological develop-. ment that may play a significant role in orthodontic diagnosi s and treatment. It. can be used to fabricate s kull models or ...

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  • Three dimensional tidal turbine array simulations using ...

    2018-1-1 · Optimum spacing of turbines was found to be three turbine diameters and wake asymmetry due to turbine rotation could be observed. Using LES study in combination with actuator lines to represent the rotation of turbine blades, Churchfield et al. (2013) investigated the structure of resulting unsteady wakes and determined staggered arrays to have ...

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  • Quasi-Three-Dimensional and Three-Dimensional Flow ...

    2015-2-6 · The complex three-dimensional flow in the wicket gate and the runner of a Francis turbine is investigated by applying both a quasi-three-dimensional and a three-dimensional computational method. The computations were conducted on a double grid containing the …

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  • Three dimensional tidal turbine array simulations using ...

    2018-1-16 · 1 1 Three dimensional tidal turbine array simulations using 2 OpenFOAM with dynamic mesh 3 Martin Nuernberg, *Longbin Tao 4 School of Marine Science and Technology, Newcastle University, Newcastle upon Tyne, 5 NE1 7RU, UK 6 Abstract 7 The flow field characteristics in the wake of an isolated tidal turbine and tidal turbine arrays 8 of up to four devices is investigated by numerical …

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  • Effective Texture Models for Three Dimensional Flow ...

    2013-1-31 · Effective Texture Models for Three Dimensional Flow Visualization ... the flow of gas in a turbine or wind over an airplane wing, blood flow in the human body - these are all cases where adequate flow ... dental functions and defined as: φ(x,t)=sin(λψ(x,t)) (4)

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  • Three-Dimensional Flow Separations in the Diffuser of a ...

    2012-5-3 · A test rig for Steam Turbine Control Valves is operated at the Laboratory of Turbomachinery of the Helmut-Schmidt-University in Hamburg. The control valve unit containing four independently operable valves is a mockup of a typical steam turbine design converted for the use of compressed air with a maximum of 4 bar.

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  • A Three-Dimensional Computational Study of Pulsating Flow ...

    2014-9-30 · Although this is of great value in showing how pulsating flow will affect the performance of the double entry turbine, the level of detail with which this can be studied is limited. This paper is the first to use a three-dimensional computational analysis to study the flow structures within a double entry turbine under conditions of pulsating flow.

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  • THREE DIMENSIONAL HEAT TRANSFER

    2014-6-16 · dimensional study cannot simulate the real heat transfer mechanism in a gas tur bine blade where three-dimension al flow is develop ed in turbine blade passages due leading edge horseshoe vortices. Langston et al. [12], Sieverding [13] and Wang et al. [14] prov ided

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  • Detection of Three-Dimensional Parameter of Defects for ...

    2019-11-11 · Gas turbine is one of the most efficient heat-to-power conversion machine and widely used in power plant, large vessel, etc. As the core parts responsible for the energy conversion in gas turbine, turbine blades are typically manufactured using the investment casting process and bear quite heavy loads in harsh environment [].Hence, in the manufacturing and service processes of gas turbine ...

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  • Performances and Stall Delays of Three Dimensional Wind ...

    2018-12-29 · The research on three dimensional (3-D) wind turbine blades has been introduced (Sutrisno, Prajitno, Purnomo, & B.W. Setyawan, 2016). In the current experiment, the 3-D wind turbine blades would be fitted with helicopter-like blade tips and additional fins to the blade hubs to demonstrate some laminarizing features.

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  • JMSE

    Turbine is one of the key components of the ocean thermal energy conversion system (OTEC), and its aerodynamic performance and geometric dimension affect the performance of the system directly. This paper proposes a design method for the radial inflow turbine suitable for the ocean thermal energy conversion based on the parameter optimization of the ocean thermal energy conversion system.

    Get Price
  • Quasi-Three-Dimensional and Three-Dimensional Flow ...

    2015-2-6 · The complex three-dimensional flow in the wicket gate and the runner of a Francis turbine is investigated by applying both a quasi-three-dimensional and a three-dimensional computational method. The computations were conducted on a double grid containing the …

    Get Price
  • Three-Dimensional Flow Predictions in Axial-Flow Turbine ...

    2014-12-23 · Numerical investigations of the three-dimensional flowfields in a turbine linear cascade and in an annular, non-rotating turbine cascade have been carried out. Both cascades were the subjects of published experimental studies. In the experimental set-up for the annular cascade the hub wall upstream of the blades could be either stationary or ...

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  • Three-Dimensional Flow in an Axial Turbine: Part 1 ...

    2015-3-18 · This paper presents an exhaustive experimental documentation of the three–dimensional nature of the flow in a one–and–one–half stage axial turbine. The intent was to examine the flow within, and downstream of, both the stator and rotor airfoil rows so as …

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  • Numerical Calculation of Three-Dimensional Euler Flow ...

    Paßrucker, H, Sanz, W, & Jericha, H. 'Numerical Calculation of Three-Dimensional Euler Flow Through a Transonic Test Turbine Stage.' Proceedings of the ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition.

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  • Optimum Design of the Dental Air-Turbine Handpiece

    2020-1-22 · An air-turbine and associated air supply tube was optimized as a dental air-turbine handpiece system. The system consists of an air-turbine with an impeller and a housing, and an air supply tube which supplies compressed-air to the air-turbine. The flow characteristics of the dental air-turbine handpiece system were investigated using ANSYS CFX. The study aimed to find the …

    Get Price
  • Three-Dimensional Blade Boundary Layer and Endwall Flow ...

    The three-dimensional viscous flow field development in the nozzle passage of an axial flow turbine stage was measured using a “x” hot-wire probe. The measurements were carried out at one axial station on the endwall and blade surfaces and at several spanwise and pitchwise locations.

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  • CFD investigation of unsteady three-dimensional savonius ...

    Savonius turbines are a drag driven device, and it has high starting torque. It is a vertical axis turbine and installed in small irrigation channels to utilize the hydrokinetic energy available. Since the density of water is more and the flow of water in the channel is constrained to one direction is the advantage for a vertical axis turbine as it reduces the yaw control mechanism.

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  • Three-Dimensional Aerodynamic Analysis of a Darrieus Wind ...

    Three-Dimensional Aerodynamic Analysis of a Darrieus Wind Turbine Blade Using Computational Fluid Dynamics and Lifting Line Theory Francesco Balduzzi, Francesco Balduzzi Università degli Studi di Firenze, Firenze, Italy. Search for other works by this author on: This Site.

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  • Three Dimensional Performance Prediction of Advanced

    2015-2-25 · The performance of high shear airblast fuel injectors for advanced gas turbine combustors is highly dependent on the design of the swirl vanes. The vanes may be of the straight or curved type. Curved vanes usually exhibit lower losses but straight vanes …

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  • A Study of the Three-Dimensional Unsteady Real-Gas Flows ...

    In this paper we investigate the three-dimensional unsteady real-gas flows which occur within Organic Rankine Cycle (ORC) turbines. A radial-inflow turbine stage operating with supersonic vane exit flows (M 1.4) is simulated using a RANS solver which includes real-gas effects.Steady CFD simulations show that small changes in the inducer shape can have a significant effect on turbine ...

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  • Three Dimensional Unsteady Flow for an Oscillating

    2014-12-23 · The results of two investigations, conducted on the aerodynamic response of a turbine blade oscillating in a three dimensional bending mode, are presented in this paper. The first is an experimental and computational study, designed to produce detailed three dimensional test cases for aeroelastic applications and examine the ability of a 3D ...

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  • Three Dimensional Unsteady Pressure Measurements for

    2014-12-24 · A complete set of unsteady blade surface pressure measurements is presented for a single turbine blade oscillating in a three dimensional bending mode. Results are provided for five spanwise sections at 10%, 30%, 50%, 70% and 90% of span.

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  • Three dimensional tidal turbine array simulations using ...

    2018-1-16 · 1 1 Three dimensional tidal turbine array simulations using 2 OpenFOAM with dynamic mesh 3 Martin Nuernberg, *Longbin Tao 4 School of Marine Science and Technology, Newcastle University, Newcastle upon Tyne, 5 NE1 7RU, UK 6 Abstract 7 The flow field characteristics in the wake of an isolated tidal turbine and tidal turbine arrays 8 of up to four devices is investigated by numerical …

    Get Price
  • Three-dimensional flow field around and downstream of a ...

    The turbine wake is highly three-dimensional and asymmetric throughout the investigated region, which extends up to 7 diameters downstream. A vortex pair, generated at the upwind-turning side of the turbine, plays a dominant role in wake dynamics by entraining faster fluid from the freestream and aiding in wake recovery. The higher TSR case ...

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  • Three-dimensional modeling and aeroelastic coupling ...

    2009-9-26 · Abstract: In order to study damage problems of the wind turbine blade under complicated offshore working conditions (damaging winds), the nonlinear aeroelastic analysis was achieved for the blade with flexible high aspect ratio. The three-dimensional solid model of the wind turbine blade was established and the appropriate computational domain was fixed.

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  • A Study of the Three-Dimensional Unsteady Real-Gas

    In this paper we investigate the three-dimensional unsteady real-gas flows which occur within Organic Rankine Cycle (ORC) turbines. A radial-inflow turbine stage operating with supersonic vane exit flows (M 1.4) is simulated using a RANS solver which includes real-gas effects.Steady CFD simulations show that small changes in the inducer shape can have a significant effect on turbine ...

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  • Three-Dimensional Tooth Segmentation by Integrating ...

    2016-1-19 · Barone, S, Paoli, A, & Razionale, AV. 'Three-Dimensional Tooth Segmentation by Integrating Multiple Ray-Sum Images From CBCT Data.' Proceedings of the ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference.

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  • Experimentally validated three‐dimensional computational ...

    2021-6-27 · Three-dimensional RANS CFD has been used to study the aerodynamics and the performance of the nominal DU 96-W-180 airfoil and one of its eroded variants considered in the wind tunnel experimental measurement campaign of Sareen et al. 2 The considered variant is representative of intermediate to advanced LE erosion of utility-scale wind turbines ...

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  • Three-dimensional modelling for assessment of far-field ...

    Three turbulence perturbation terms are added to the turbulence closure to simulate the turbine-induced turbulence generation, dissipation and interference for the turbulence length-scale. Impacts of turbine operation on surface waves are also considered by modification of wave energy flux across the device.

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  • Three-dimensional manufacturing methods and systems

    TECHNICAL FIELD. The present application and the resultant patent relate generally to gas turbine engines and more particularly relate to three-dimensional manufacturing methods and systems for complex hot gas path turbine components and the like with improved cooling capacity.

    Get Price
  • Three-dimensional wind turbine simulation and analysis

    2020-10-13 · Three-dimensional wind turbine simulation and analysis by Jennifer Ann Cordero A thesis submitted to the graduate faculty in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Major: Mechanical Engineering Major Professors: R. …

    Get Price
  • Numerical Flow Analysis of Fully Three-Dimensional Turbine ...

    2015-4-15 · Numerical Flow Analysis of Fully Three-Dimensional Turbine Cascades Masahiko Koya, Masahiko Koya Ishikawajima Harima Heavy Indusries, Tokyo, Japan. Search for other works by this author on: This Site. PubMed. Google Scholar. Susumu …

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  • Three-Dimensional Analysis of Turbine Rotor Flow Including ...

    2015-2-25 · A 3D Navier-Stokes investigation of a high pressure turbine rotor blade including tip clearance effects is presented. The 3D Navier-Stokes code developed at ONERA solves the three-dimensional unsteady set of mass-averaged Navier-Stokes equations by the finite volume technique.

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  • Three dimensional tidal turbine array simulations using ...

    2018-1-16 · 1 1 Three dimensional tidal turbine array simulations using 2 OpenFOAM with dynamic mesh 3 Martin Nuernberg, *Longbin Tao 4 School of Marine Science and Technology, Newcastle University, Newcastle upon Tyne, 5 NE1 7RU, UK 6 Abstract 7 The flow field characteristics in the wake of an isolated tidal turbine and tidal turbine arrays 8 of up to four devices is investigated by numerical …

    Get Price
  • Three-Dimensional Flow Separations in the Diffuser of a ...

    2012-5-3 · A test rig for Steam Turbine Control Valves is operated at the Laboratory of Turbomachinery of the Helmut-Schmidt-University in Hamburg. The control valve unit containing four independently operable valves is a mockup of a typical steam turbine design converted for the use of compressed air with a maximum of 4 bar.

    Get Price
  • Three Dimensional LES Simulation of Bi-Directional Turbine ...

    2011-10-31 · Velez, C, Papesh, B, Ilie, M, & Qu, Z. 'Three Dimensional LES Simulation of Bi-Directional Turbine for Wave Energy Conversion.' Proceedings of the ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. Volume 5: Ocean Space Utilization; Ocean Renewable Energy. Rotterdam, The Netherlands. June 19–24, 2011. pp. 887-891.

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  • A Study of the Three-Dimensional Unsteady Real-Gas Flows ...

    In this paper we investigate the three-dimensional unsteady real-gas flows which occur within Organic Rankine Cycle (ORC) turbines. A radial-inflow turbine stage operating with supersonic vane exit flows (M 1.4) is simulated using a RANS solver which includes real-gas effects.Steady CFD simulations show that small changes in the inducer shape can have a significant effect on turbine ...

    Get Price
  • Three-Dimensional Tooth Segmentation by Integrating ...

    2016-1-19 · Barone, S, Paoli, A, & Razionale, AV. 'Three-Dimensional Tooth Segmentation by Integrating Multiple Ray-Sum Images From CBCT Data.' Proceedings of the ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference.

    Get Price
  • Three Dimensional Performance Prediction of Advanced

    2015-2-25 · The performance of high shear airblast fuel injectors for advanced gas turbine combustors is highly dependent on the design of the swirl vanes. The vanes may be of the straight or curved type. Curved vanes usually exhibit lower losses but straight vanes …

    Get Price
  • Horizontal Axis Wind Turbine Aerodynamics: Three ...

    series, turbulent inflow condition, or turbine architecture. As such, the ability of current aerodynamic models to adequately predict quasi-steady, three-dimensional, post-stall performance remains in question, let alone three-dimensional dynamic stall performance …

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  • Three-Dimensional Navier-Stokes Computation of Turbine ...

    2015-2-16 · A three-dimensional Navier-Stokes procedure has been used to compute the three-dimensional viscous flow through the turbine nozzle passage of a single stage turbine. A low Reynolds number k-ε model and a zonal k-ε/ARSM (algebraic Reynolds stress model) are …

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  • Three Dimensional Optimum Design of a Steam Turbine

    2012-5-25 · Three-dimensional CFD grid is automatically generated for the changed blade shapes and steady CFD calculation is used to evaluate the aerodynamic performance of the changed blades in a turbine stage. Stagger angle distribution in the radial direction was thought as one of the important design parameters of turbine blades because it determines ...

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  • Three-dimensional structure of wind turbine wakes as ...

    2020-7-15 · Three-dimensional structure of wind turbine wakes 2883 Figure 1. Schematic view of the part of the wind farm in central Iowa where the CWEX-13 field campaign took place. The row of four turbines whose wakes are detected by the scanning lidar is highlighted in a purple ellipse. Table 1. Technical specifications of the studied wind turbines in

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  • Unsteady Three-Dimensional Turbine Aerodynamics

    2015-4-15 · Unsteady Three-Dimensional Turbine Aerodynamics. J. Eng. Power (April,1983) Three-Dimensional Blade Boundary Layer and Endwall Flow Development in the Nozzle Passage of a Single Stage Turbine. J. Fluids Eng (September,1998) Interaction of Rim Seal and Annulus Flows in an Axial Flow Turbine.

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  • Numerical Flow Analysis of Fully Three-Dimensional

    2015-4-15 · Koya, M, & Kotake, S. 'Numerical Flow Analysis of Fully Three-Dimensional Turbine Cascades.' Proceedings of the ASME 1984 International Gas Turbine Conference and Exhibit.

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  • A Three-Dimensional Diffuser Design for the Retrofit of a ...

    2012-5-3 · Yoon, S, Stanislaus, FJ, Mokulys, T, Singh, G, & Claridge, M. 'A Three-Dimensional Diffuser Design for the Retrofit of a Low Pressure Turbine Using In-House Exhaust Design System.' Proceedings of the ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. Volume 7: Turbomachinery, Parts A, B, and C. Vancouver, British Columbia, Canada.

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  • Three-dimensional velocity measurements around and ...

    Measurements were taken with the turbine stationary and while driven at tip speed ratios (TSRs) of 1.25 and 2.5, realistic values for VAWTs in operation. The MRV measurement produced three-dimensional velocity data with a resolution of 1/50 of the turbine diameter in all three directions.

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  • Effects of Tip Endwall Contouring on the Three

    2015-3-31 · Arts, T. 'Effects of Tip Endwall Contouring on the Three Dimensional Flow Field in an Annular Turbine Nozzle Guide Vane: Part 2 — Numerical Investigation.' Proceedings of the ASME 1985 International Gas Turbine Conference and Exhibit .

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  • Three-dimensional manufacturing methods and systems

    TECHNICAL FIELD. The present application and the resultant patent relate generally to gas turbine engines and more particularly relate to three-dimensional manufacturing methods and systems for complex hot gas path turbine components and the like with improved cooling capacity.

    Get Price
  • Multi-Dimensional Platform for Cooling Design of Air ...

    2013-7-9 · Progresses in conjugate heat transfer simulation method provide a new approach for turbine blade cooling design. The procedure of air-cooled blade design introduced in this paper consists of two levels, a schematic design using 1D flow network calculation method, and a detailed design based on CFX conjugate heat transfer simulation.

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  • Three dimensional resonant vibrations and stresses in ...

    2020-10-13 · Three dimensional resonant vibrations and stresses in turbine ... Patrick J., 'Three dimensional resonant vibrations and stresses in turbine blade groups' (1981). Thesis. Rochester Institute of Technology. Accessed from This Thesis is brought to you for free and open access by RIT Scholar Works. ... Pinion Tooth Frequencies..20. 8. General ...

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  • Three-Dimensional Gas Turbine Combustor Emissions Modeling ...

    2015-3-3 · Three-Dimensional Gas Turbine Combustor Emissions Modeling. J. Eng. Gas Turbines Power (July,1993) The Role of Fuel Preparation in Low-Emission Combustion. J. Eng. Gas Turbines Power (October,1995) Fluid Modeling vs. Pollution. Mechanical Engineering (January,1999) Related Chapters.

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  • Simulation of Three-Dimensional Viscous Flow Within a ...

    Adamczyk, JJ, Celestina, ML, Beach, TA, & Barnett, M. 'Simulation of Three-Dimensional Viscous Flow Within a Multistage Turbine.' Proceedings of the ASME 1989 International Gas Turbine and Aeroengine Congress and Exposition.

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  • Unsteady and Three-dimensional CFD Simulation of a ...

    Three different turbine placement positions at different heights are investigated to observe Cp - λ curve sensitivity at various tip speed ratios. Position 1 and Position 2 are at the edge of the building, whereas position 3 is a few meters away from the edge, directed towards the geometric center of a building.

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  • Three-dimensional unsteady gas turbine flow measurement -

    Three-dimensional unsteady gas turbine flow measurement . By J. Batt. ... 21E - Jet turbine engines, gas turbine engines, 20I - Fluid mechanics, TURBOMACHINERY, ... please submit an Update/Correction/Removal Request. About.

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  • HEROfill - Micro-Mega

    HEROfill, endodontic obturation system. Obturation guarantees the three-dimensional sealing of canals and conditions the success of the endodontic treatment in the long term. The HEROfill system is a 3rd generation endodontic obturator which was developed to allow the practitioner a fast and reliable means of obturating a root canal. The ...

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  • E 26 Three Dimensional Modeling for Design Fall 2017

    2019-2-3 · Project Report Guidelines (One report per group) Due Wed. Dec. 14 at the final exam Cover (title) page - picture (color) of your wind turbine, the title of the project (descriptive and specific), the entity for which the report was written, i.e., University of California, Mechanical Engineering Dept. E26, names of the team members, group number, name of the instructor, and the

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  • Three-dimensional flow field around and downstream of a ...

    Three-dimensional, three-component mean velocity fields have been measured around and downstream of a scale model vertical axis wind turbine (VAWT) operated at tip speed ratios (TSRs) of 1.25 and 2.5, in addition to a non-rotating case. The five-bladed turbine model has an aspect ratio (height/diameter) of 1 and is operated in a water tunnel at a Reynolds number based on turbine diameter of ...

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  • Comparison of two-equation turbulence models for boundary ...

    2012-5-17 · Optimum design of a saw-tooth-shaped dental air-turbine using design of experiment. ... Assessment of eight turbulence models for a three-dimensional boundary layer involving crossflow and streamwise vortices. ... Turbine blade heat transfer prediction in flow transition using k …

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  • 3D Models, CAD Solids - 3D CAD Browser

    '3D CAD Browser is an indispensible part of my illustration toolkit. I work in concept art for film where the deadlines come fast and furious. This site 3d models provide me with the ability to put together a quick template on which to build a final illustration in a fraction …

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