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In this study, numerical investigations of flow characteristics of a pumpjet propulsor based on Computational Fluid Dynamics (CFD) method have been presented. The Zwart-Gerber-Belamri (Z-G-B) cavitation model based on the Reynolds Averaged Navier-Stokes (RANS) method is employed. The structured gird is applied. A four-blade skewed E779A propeller has been used to verify the numerical method. The comparison...
A method to generate vehicle maneuvering forces from a propulsor alone has been applied to a generic undersea vehicle. Open and ducted post-swirl propulsors were configured with an upstream rotor and downstream stator row. During normal operation, the downstream stator blades are all situated at the same pitch angle and generate a roll moment to counter the torque produced by the rotor. By varying...
Thermal flow simulation based on computational fluid dynamics (CFD) is applied to the thermal design of electronic equipment. This paper discusses the applicability of the multiple reference frame (MRF) approach, which is a new method for modeling an axial cooling fan, to the thermal flow simulation of electronic equipment. In this study, we performed flow visualization of the exhaust air flow pattern...
The Compressor Aerodynamics Research Laboratory at Wright-Patterson Air Force Base is currently investigating, experimentally and numerically, the effects of inlet distortion on transonic fan performance. The experimental investigation will quantify the flowfield for a cold-tested diffuser-fan with distortion screens, and a coupled diffuser-fan system. Each of these experiments will be mirrored numerically...
In the field of hydraulic turbine Computational Fluid Dynamics (CFD) is routinely used today in research and development as well as in design. The Navier-Stokes steady flow analysis has been applied to successfully predicted flow characteristics and energy losses in different hydraulic turbine components. It has been used to design and optimize hydraulic turbine components. With the increasing of...
In the field of hydraulic turbine computational fluid dynamics (CFD) is routinely used today in research and development as well as in design. A special attention is paid to the hydraulic turbine stability with the increasing of unit power and size. In order to get solutions to the stability problem an unsteady flow analysis is necessary. Different numerical schemes are discussed for the rotor-stator...
The three-dimensional multi-stage turbomachinery flow simulation is calculated on the PC cluster environment in NCHC. The UTRC large-scale turbine is employed here as the baseline configuration. A compressible viscous finite volume algorithm solving Reynolds averaged Navier-Stokes equations with artificial dissipation terms similar to Jameson's method is adopted circumferential average is performed...
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