A novel experimental method to evaluate the impact of volute's asymmetry on the performance of a high pressure ratio turbocharger compressor  

作　　者：LIN Yun ZHENG XinQian JIN Lei TAMAKI Hideaki KAWAKUBO Tomoki 

机构地区：[1]State Key Laboratory of Automotive Safety and Energy,Tsinghua University,Beijing 100084,China [2]IHI Corporation,Tokyo,Japan

出　　处：《Science China(Technological Sciences)》2012年第6期1695-1700,共6页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 50806040)

摘　　要：All components of a turbocharger compressor are axisymmetric except for the spiral-shaped,gas-collecting overhung volute.In this paper,a novel experimental method to evaluate the impact of the volute's asymmetry on centrifugal compressor performance is proposed and applied to a high pressure-ratio turbocharger compressor.This method can isolate the impact of the volute's asymmetry on the compressor performance for the first time.Experiments prove the considerable impact of the volute's asymmetry on the compressor performance,especially the stability and efficiency.The impact of the volute's asymmetry on compressor stability correlates with rotational speed and thus with the pressure ratio,constricting the stable flow range by up to 47 percent and decreasing the maximum efficiency by 4.8 percent at the design speed.The results provide evidence to exploit the potential of intrinsic non-axisymmetric flow induced by asymmetric volute to improve the performance of turbocharger compressor with a high pressure ratio.

关 键 词：high pressure-ratio TURBOCHARGER centrifugal compressor volute IC engine 

分 类 号：TK423.52[动力工程及工程热物理—动力机械及工程] TH452[机械工程—机械制造及自动化]