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A New Loss Generation Body Force Model For Fan/Compressor Blade Rows: Application To Uniform And Non-Uniform Inflow In Rotor 67, Syamak Pazireh, J. J. Defoe
A New Loss Generation Body Force Model For Fan/Compressor Blade Rows: Application To Uniform And Non-Uniform Inflow In Rotor 67, Syamak Pazireh, J. J. Defoe
Mechanical, Automotive & Materials Engineering Publications
Despite advances in computational power, the cost of time-accurate flows in axial compressor and fan stages with spatially non-uniform inflow is still too high for design-stage use in industry. Body force modeling reduces the computation time to practical levels, mainly by reducing the problem to a steady one. These computations are important to determine efficiency penalties associated with non-uniform inflows. Previous studies of body force methods have, in most cases, relied on computations with the presence of the blades to calibrate loss models. In some recent studies, uncalibrated models have been used, but such models can drop off in accuracy …
The Effect Of Blade Count On Body Force Model Performance For Axial Fans, Palek Saini, Jeffrey J. Defoe
The Effect Of Blade Count On Body Force Model Performance For Axial Fans, Palek Saini, Jeffrey J. Defoe
Mechanical, Automotive & Materials Engineering Publications
Body force models enable inexpensive numerical simulations of turbomachinery. The approach replaces the blades with sources of momentum/energy. Such models capture a “smeared out” version of the blades’ effect on the flow, reducing computational cost. The body force model used in this paper has been widely used in aircraft engine applications. Its implementation for low speed, low solidity (few blades) turbomachines, such as automotive cooling fans, enables predictions of cooling flows and component temperatures without calibrated fan curves. Automotive cooling fans tend to have less than 10 blades, which is approximately 50% of blade counts for modern jet engine fans. …