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《Fluid Machinery》 2010-08
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Investigation on the Performance Prediction of Single-Stage Axial Compressor by Using Different Turbulence Models

WANG Yi-tian1,2,ZHANG Zhao-lei1,XU Jing2,WANG Dong2,HUANG Shu-jian1 (1.School of Power and Energy Engineering of Xi'an Jiaotong University,Xi'an 710049,China;2.Shanxi Blower(group) Co.,Ltd.,Xi'an 710075,China)  
The Numerical Simulations of the steady flow were performed by using Spalart-Allmaras,k-ε,k-ω,BSL,SST and ω turbulence models in the single-stage axial compressor at different flow rates.The predicted overall performances were compared to the reliable experimental data.The results show that relatively accurate predictions can be obtained at,or close to,the design point,but the reliability of the predictions was questionable at off-design conditions,especially near the stall point and chock point.Therefore,an investigation was achieved to find out the cause of the deviations by analyzing the pressure coefficient,polytropic effecinecy,pressure ratio as well as difference in temperature.The reason was that the viscous losses of the flow were underestimated in the turbulence models,especially near the stall point and chock point.In the six turbulence models,the k-ω model has more accuracy with large predictable operation range and less CPU time,and Spalart-Allmaras model saves CPU time but less accurate.
【CateGory Index】: TH453
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