Effect of double air injection on performance characteristics of centrifugal compressor
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- 作者：Toshiyuki Hirano ; Tatsuya Ogawa ; Ryutaro Yasui…
- 关键词：Centrifugal Compressor ; Performance ; Nozzle Injection ; Surge
- 刊名：Journal of Thermal Science
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：26
- 期：1
- 页码：11-17
- 全文大小：
- 刊物类别：Physics and Astronomy
- 刊物主题：Classical and Continuum Physics; Engineering Fluid Dynamics; Engineering Thermodynamics, Heat and Mass Transfer;
- 出版者：Science Press
- ISSN：1993-033X
- 卷排序：26
文摘
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.