紀要論文

吹込みノズルによる遠心圧縮機のサージングの制御 : 壁面噴射型ノズルの適用

CONTROL OF SURGE IN CENTRIFUGAL COMPRESSOR BY USING NOZZLE INJECTION SYSTEM : APPLICATION OF WALL INJECTION TYPE OF NOZZLE

jpn

24368083

https://doi.org/10.15002/00025277

法政大学大学院理工学研究科

法政大学大学院紀要. 理工学研究科編

63

1

6

2022-03-24

Version of Record

In this study, new type of injection nozzle was proposed to control the surge occurring at the low flow rate in a centrifugal compressor of automotive turbocharger. In the old type, the injection nozzle composed of circular pipe was installed on the inner wall surface of suction pipe, and consequently becomes an obstacle to the primary flow into the compressor impeller. The new type one was designed by considering the practical installation and its opening end is located on the inner wall surface of suction pipe. The performance tests for the compressor with the new type one were carried out at the rotational speed of 60,000 rpm. The results showed that the new type one possessed less effective for the surge suppression than that of old type one. Then the jet flow behaviors from the injection nozzles were numerically analyzed to improve the new type of nozzle. The computed results suggested that the jet from the new type one should be so deflected in the axial direction as to flow along the inner wall surface of the suction pipe.

Article