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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.
Get PriceDigital 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 PriceBuy 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.
Get Price2014-6-16 · 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
Get Price2018-9-15 · 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.
Get PriceAn 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.
Get PriceIn 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 ...
Get PriceThe 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.
Get Price2012-5-17 · 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 …
Get PriceA 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 ...
Get Price2012-5-23 · Three-dimensional Navier-Stokes simulations of turbine rotor-stator interaction. Part I - Methodology. Man Mohan Rai
Get Price2010-2-16 · '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.
Get PriceNonlinear, 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.
Get PriceDigital 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 PriceBuy 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.
Get PriceInjection 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.
Get PriceIn 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 ...
Get PriceAcoustic 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 ...
Get PriceA 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 ...
Get Price2020-2-24 · 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.
Get Price2015-3-3 · 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 ...
Get PriceIn 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 ...
Get Price2012-5-22 · 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 ,
Get Price1997-1-1 · 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.
Get Price2019-4-29 · 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%.
Get Price2013-6-8 · 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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Get Price2020-6-16 · 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.
Get Price2 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 ...
Get PriceBuy 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.
Get Price2012-5-17 · 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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Get Price2 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 ...
Get Price2021-7-10 · 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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Get Price2012-5-23 · 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.
Get PriceSivashanmugam, 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.
Get Price2014-12-16 · 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.
Get PriceUnsteady 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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Get Price2021-2-12 · 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
Get PriceThree-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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