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  • Three-dimensional flow simulation of transient

    2013-5-23 · The transient power failure process of a prototype pump-turbine was studied numerically by three-dimensional (3-D) simulations. Fluid coupling and dynamic mesh (DM) method were used to calculate the rotational speed of the runner. Simulations were performed based on turbulence model. Specific transient characteristics, such as the flow rate, head, rotational speed, were analyzed.

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  • Accuracy of Three-Dimensional (3D) Printed Dental

    Digital impression devices are used alternatively to conventional impression techniques and materials. The aim of this study was to evaluate the precision of extraoral digitalization of three types of photosensitive resin polymers used for 3D printing with the aid of a digital extraoral optical scanner. The alignment of the scans was performed by a standard best-fit alignment.

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  • Woodpecker Dental Products at Best Price Online ...

    Buy Woodpecker Dental Products. Woodpecker, the biggest ultrasonic scaler manufacturer, owns a maximal production and consumption of ultrasonic scaler in the world.The export volume of LED curing light is also in the leading position. In the past 26 years, Woodpecker has been focused on researching, developing, selling dental equipment.

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

    2014-6-16 · Three-Dimensional Navier-Stokes Simulations of Turbine Rotor-Stator Interaction; Part I - Methodology ... End-wall and tip-leakage effects and the geometry of the air-foils may contribute significantly to the three-dimensionality of the flow. Hence, an accurate simulation of the flow within ... Three-Dimensional Navier-Stokes Simulations of Turbine

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  • Study on an innovative three-dimensional wind

    2018-9-15 · 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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  • Study on an innovative three-dimensional wind

    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. The predictions from the wake model are practical.

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  • Numerical Simulation of the Three-Dimensional

    In order to study the internal flow characteristics of roto-jet pump, the standard turbulence model and SIMPLEC algorithm were used to calculate the three-dimensional turbulence flow field under design condition. The simulation results reveal the internal flow phenomena of roto-jet pump, which shows the pressure near the suction surface and the inlet edge of impeller is minimum, and the ...

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  • Three-Dimensional Simulation of Air Entrainment in

    The three-dimensional unsteady vortex flow in a sump pump is investigated by the computational fluid dynamics (CFD) method with the shear-stress transport (SST) k − ω model and the volume of fluid (VOF) multiphase model. The helicity density, involving both velocity and vortex, is especially used to discuss the mechanism of the process for air entrainment.

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  • Comparison of two-equation turbulence models for

    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. ... Flow Analysis in a Pump Diffuser—Part 2: Validation and Limitations of …

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  • A three-dimensional numerical study of the Magnus

    A three-dimensional numerical study of the Magnus wind turbine with different blade shapes Xiaojing Sun,1,2 Yueqing Zhuang,1,2 Yang Cao,3 Diangui Huang,1,2,a) and Guoqing Wu3 1Shanghai Institute ...

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  • Three-dimensional Navier-Stokes simulations of

    2012-5-23 · Three-dimensional Navier-Stokes simulations of turbine rotor-stator interaction. Part I - Methodology. Man Mohan Rai

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  • Three Dimensional Heat Transfer Analysis of High

    2010-2-16 · 'Three Dimensional Heat Transfer Analysis of High Pressure Turbine Blade.' Proceedings of the ASME Turbo Expo 2009: Power for Land, Sea, and Air. Volume 3: Heat Transfer, Parts A and B. Orlando, Florida, USA. June 8–12, 2009. pp. 71-79. ASME.

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  • Nonlinear, three-dimensional finite-element analysis

    Nonlinear, three-dimensional finite-element analysis of air-cooled gas turbine blades Cyclic stress-strain states in cooled turbine blades were calculated for a simulated mission of an advanced-technology commercial aircraft engine. The MARC, nonlinear, finite-element computer program was used for the analysis of impingement-cooled airfoils, with and without leading-edge film cooling.

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  • Accuracy of Three-Dimensional (3D) Printed Dental

    Digital impression devices are used alternatively to conventional impression techniques and materials. The aim of this study was to evaluate the precision of extraoral digitalization of three types of photosensitive resin polymers used for 3D printing with the aid of a digital extraoral optical scanner. The alignment of the scans was performed by a standard best-fit alignment.

    Get Price
  • Woodpecker Dental Products at Best Price Online ...

    Buy Woodpecker Dental Products. Woodpecker, the biggest ultrasonic scaler manufacturer, owns a maximal production and consumption of ultrasonic scaler in the world.The export volume of LED curing light is also in the leading position. In the past 26 years, Woodpecker has been focused on researching, developing, selling dental equipment.

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  • Three-Dimensional Calculations of the Flow Field

    Injection of coolant air from a showerhead injection system at the leading edge of a high pressure turbine blade is investigated using a fully implicit three-dimensional finite-volume method on multi-block grids. For various blowing rates, the calculation results for the velocity and pressure fields and turbulence intensity are compared with available experimental data.

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  • Numerical Simulation of the Three-Dimensional

    In order to study the internal flow characteristics of roto-jet pump, the standard turbulence model and SIMPLEC algorithm were used to calculate the three-dimensional turbulence flow field under design condition. The simulation results reveal the internal flow phenomena of roto-jet pump, which shows the pressure near the suction surface and the inlet edge of impeller is minimum, and the ...

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  • Acoustic streaming in an ultrasonic air pump with

    Acoustic streaming in an ultrasonic air pump with three-dimensional finite-difference time-domain analysis and comparison to the measurement Ultrasonics. 2014 Dec;54(8):2119-25. doi: 10.1016/j.ultras.2014.06.015. Epub 2014 Jun 24. Authors Yuji Wada 1 ...

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  • A three-dimensional numerical study of the Magnus wind ...

    A three-dimensional numerical study of the Magnus wind turbine with different blade shapes Xiaojing Sun,1,2 Yueqing Zhuang,1,2 Yang Cao,3 Diangui Huang,1,2,a) and Guoqing Wu3 1Shanghai Institute ...

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  • Two-Dimensional Computational Fluid Dynamics

    2020-2-24 · The vertical axis wind turbine (VAWT) is deemed to be potential in offshore wind energy utilization. A design of the offshore vertical axis wind turbine with a deflector is proposed and studied in this paper. Two-dimensional computational fluid dynamics (CFD) simulation is employed to investigate the aerodynamic performance of wind turbine.

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  • Three-Dimensional Gas Turbine Combustor

    2015-3-3 · ASME 1992 International Gas Turbine and Aeroengine Congress and Exposition June 1–4, 1992 ... HC. 'Three-Dimensional Gas Turbine Combustor Emissions Modeling.' Proceedings of the ASME 1992 International Gas Turbine and ... and helped to understand the influence of the combustor details and air admission arrangement on reaction rates and ...

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  • Numerical Simulation of the Three-Dimensional

    In order to study the internal flow characteristics of roto-jet pump, the standard turbulence model and SIMPLEC algorithm were used to calculate the three-dimensional turbulence flow field under design condition. The simulation results reveal the internal flow phenomena of roto-jet pump, which shows the pressure near the suction surface and the inlet edge of impeller is minimum, and the ...

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  • Three-Dimensional Optimization of a Gas Turbine

    2012-5-22 · A three-dimensional approach to the optimization of a gas turbine disc and blade attachment. R. ALDERSON , M. TANI , R. HILL and. D. TREE. 11th Propulsion Conference August 2012. 3D Optimization of the Fir-tree Design on the Turbine Disk/Blade attachment. Jian Ming Lee ,

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  • Three-Dimensional Unsteady Flow and Forces in

    1997-1-1 · Fatsis, A., 1993, “Three Dimensional Unsteady Flow Calculations in Radial Components,” presented at VKI LS 1993-01 “Spacecraft Propulsion.” 8. Fatsis, A., Van den Braembussche, R., 1994, “Evaluation of an Euler Code With Non-reflecting Boundary Conditions for the Analysis of 3D Flow in Radial Impellers,” ASME Paper No. 94-GT-147.

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  • Ag-Modified Cu Foams as Three-Dimensional Anodes for ...

    2019-4-29 · Afterward, Ag-modified three-dimensional anode is used in a rechargeable zinc–air battery, which presents a Coulombic efficiency of 94% after 80 cycles with 2 h cycle period. Besides, Ag-modified three-dimensional anode is free of Zn dendrites at different depth of discharge from 5% to 20%.

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  • Three-dimensional numerical studies of a jet airflow ...

    2013-6-8 · This paper presents the results of three-dimensional numerical studies of hydrodynamics and heat exchange on the models of flat plates in the jet airflow. These results are compared with the experimental data. A three-dimensional model for determining the thermal condition of the nozzle clusters in the conjugated formulation is proposed. Also presented are the data on optimization of the ...

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

    'I use background objects for 3D illustrations of new product designs. I couldn't possibly take time to model a Boeing 737 when it is not part of the new design but only a background object. 3D CAD Browser lets me download all of the objects I need by simply sharing my own.

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  • High power density Al-air batteries with commercial three ...

    2020-6-16 · Aluminum (Al) is the desired material for metal-air batteries, owing to its attractive electrochemical performance. Unfortunately, the actual power densities of the batteries are relatively low. This research describes a high power density Al-air battery equipped with commercial three-dimensional (3D) Al foam as the anode coupled with dual cathodes in NaOH electrolyte.

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  • FAULHABER Drive Systems

    2 天前 · Curves. The performance of a centrifugal pump can be shown graphically on a characteristic curve. A typical characteristic curve shows the total dynamic head, brake horsepower, efficiency, and net positive Suction head all plotted over the capacity range of the pump. Figures 5, 6, & 7 are non-dimensional curves which indicate the general shape ...

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  • Woodpecker Dental Products at Best Price Online ...

    Buy Woodpecker Dental Products. Woodpecker, the biggest ultrasonic scaler manufacturer, owns a maximal production and consumption of ultrasonic scaler in the world.The export volume of LED curing light is also in the leading position. In the past 26 years, Woodpecker has been focused on researching, developing, selling dental equipment.

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  • Comparison of two-equation turbulence models for

    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. ... Flow Analysis in a Pump Diffuser—Part 2: Validation and Limitations of …

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  • Best 3D models of Cars, Objects and more - Hum3D

    Spray Hose 20.00 - 150.00 50 Rolls (MOQ) White master batch 3.20 1 Kilogram (MOQ) MDH Compound Masterbatch for ACP _ DHFR B1 900.00 - 1,400.00 20 Metric Tons (MOQ) High density polyethylene HDPE/9503HF extrusion grade hollow grade food grade 1,400.00 25 Tonnes (MOQ)

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  • ECPlaza: Manufacturers, Suppliers, Exporters &

    2 天前 · Download Free AutoCAD Blocks on our site. AutoCAD Blocks it is an assistant for the architect. This program, rightly takes the first place among the software of computer-aided design (CAD), it is used by engineering services, as the engineering industry, and architecture. In addition, AutoCAD serves as a graphical basis for many CAD programs ...

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  • Turbine - Turbine selection on the basis of specific

    2021-7-10 · But by following these 6 simple rules, you can avoid premature pump failure and related pump piping pitfalls. 1. KEEP SUCTION PIPING AS SHORT AS POSSIBLE. Include a straight run pipe length equal to 5 to 10 times the pipe diameter between the pump …

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  • Subaru EE20 Diesel Engine - australiancar.reviews

    OutTac Gear GmbH - Messer, Tools, Lampen & Ausrüstung seit 1996 ! - 10% Neukundenrabatt

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  • Three-dimensional analysis of gas turbine combustors ...

    2012-5-23 · Three-dimensional analysis of gas turbine combustors. ... Fully explicit implementation of direct numerical simulation for a transient near-field methane/air diffusion jet flame. Computers & Fluids, Vol. 39, No. 8. Emissions. 29 June 2010.

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  • Aero-Structural Optimization of an Axial Turbine

    Sivashanmugam, VK, Arabnia, M, & Ghaly, W. 'Aero-Structural Optimization of an Axial Turbine Stage in Three-Dimensional Flow.' Proceedings of the ASME Turbo Expo 2010: Power for Land, Sea, and Air.

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  • A Computational Visualization of Three Dimensional

    2014-12-16 · Donahoo, EE, Camci, C, Kulkarni, AK, & Belegundu, AD. 'A Computational Visualization of Three Dimensional Flow: Finding Optimum Heat Transfer and Pressure Drop Characteristics From Short Cross-Pin Arrays and Comparison With Two Dimensional Calculations.' Proceedings of the ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition.

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  • Numerical Simulation of Three Dimensional Unsteady

    Unsteady flow of a single six-blade ruston turbine in stirred tank is numerically simulated by using the large eddy simulation. Then the effect of the turbine installation position on mixing flow field is studied. The result shows that with a relatively low paddle installation position, mixing effect at the bottom of tank is obvious, while which go against the materials at the top layer mixing.

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  • Three dimensional dynamic characteristics of solid ...

    2012-8-16 · American Institute of Aeronautics and Astronautics 12700 Sunrise Valley Drive, Suite 200 Reston, VA 20191-5807 703.264.7500

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  • A380 - Passenger aircraft - Airbus

    2021-2-12 · A strategy for fabricating three-dimensional porous architecture comprising metal oxides/CNT as highly active and durable bifunctional oxygen electrocatalysts and their application in rechargeable Zn-air batteries Chemical Engineering Journal ( IF 13.273) Pub Date : 2021-02-05, DOI: 10.1016/j.cej.2021.128815

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  • Free 3D Models - Download Free 3D Models 3DExport

    Three-dimensional guidance method for air to ground missile with impact time constraint Dong Guo Peng Jiang Zixuan Liang Zhang Ren 【摘要】: This paper presents a three-dimensional guidance method based on sliding mode control(SMC) theory for attacking fixed target with time constraint.

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  • Three Dimensional Development - Home | Facebook

    Download Free 3D Models. Some of these 3d models are ready for games and 3d printing. Available formats: c4d, max, obj, fbx, ma, blend, 3ds, 3dm, stl - 3DExport.com

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