Predictive Study on Commonly Used Turbulence Models for Rotor Blade Tip Leakage Flow in a Low Speed Axial Compressor
In order to study the ability of commonly used turbulence models to predict the rotor blade tip leakage flow(TLF)in axial compressor,experimental studies and numerical simulations of a low-speed axial compressor were conducted to compare and analyze the differences and similarities of the flow field distribution,swirl characteristics,and blockage characteristics of the rotor blade tip leakage flow predic-ted by different turbulence models with the experimental results.The results show that for the tip leakage vortex(TLV),both the trajectory slope of the TLV at the near-stall point,the location distribution along the circumferential direction and the area of the TLV core predicted by the k-w model match best with the measured results;for the blockage characteristics of the TLF,the BSL model matches best with the experimental results before obtaining the peak value of the blockage coefficient,while the k-ε model matches best with the experimental results after obtaining the peak value of the blockage coefficient.The distribution law of the blockage coefficient along the streamwise direction simulated by the k-ω model is the closest one compared with measured results though its value in all the streamwise locations is a little higher than the measured results.
turbulence modelblade tip leakage flowaxial compressor
万方数据
维普
