A fast computational method of the aerodynamic performance of fan and booster with inlet distortion

Abstract

A fast computational method of the aerodynamic characteristics of fan and booster with inlet distortion is developed in this paper. This method is based on a time-marching throughflow model, and the governing equations are circumferentially averaged Navier-Stokes equations. A model of distributed inviscid blade force and viscid blade force is adopted to reproduce the flow deflection and loss. The deviation angle and loss parameters are interpolated from a database which is extracted from 3-D simulation results of compressor with uniform inlet. After a validation case is performed, the aerodynamical performances of a multistage fan and booster with inlet radial and circumferential distortion are computed. The results show the predictive ability of this method, and the acceptable computational time cost indicates the future application potential of this method during the design stage of a new turbomachinery.

A Three-Dimensional Body Force Modeling of Fans in Windmilling Condition and Its Application

“…The body force model is reasonable in predicting the variation pattern of fan rotational speed. When a fan rotor in normal working condition experiences distortion at the inlet, the interaction between the fan rotor and the distorted flow field makes the parameters at the fan outlet tend to uniform in the circumferential direction due to the suction effect of the blade row [24,33,34]. This effect mitigates the distortion impact.…”