Effect of Double Air Injection on Performance Characteristics of CentrifugalCompressor

作     者：Toshiyuki Hirano Tatsuya Ogawa Ryutaro Yasui Hoshio Tsujita 

作者机构：Mechanical Engineering Course Department of Science and Engineering Kokushikan University 4-28-1 SetagayaSetagaya City Tokyo 154-8515 Japan Graduate School of Engineering Program in Mechanical Engineering Kokushikan University Nexco-East Engineering Company Limited Department of Mechanical Engineering Faculty of Science and Engineering Hosei University 3-7-2 Kajino-choKoganei City Tokyo 184-8584 Japan 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2017年第26卷第1期

页      面：11-17页

核心收录：

学科分类：080703[工学-动力机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 

主　　题：Centrifugal Compressor, Performance, Nozzle Injection, Surge 

摘      要：In the operation of a centrifugal compressor of turbocharger, instability phenomena such as rotating stall and surge are induced at a lower flow rate close to the maximum pressure ratio. In this study, the compressed air at the exit of centrifugal compressor was re-circulated and injected to the impeller inlet by using two injection nozzles in order to suppress the surge phenomenon. The most effective circumferential position was examined to reduce the flow rate at the surge inception. Moreover, the influences of the injection on the fluctuating property of the flow field before and after the surge inception were investigated by examining the frequency of static pressure fluctuation on the wall surface and visualizing the compressor wall surface by oil-film visualization technique.