11403 Effect of Air Injection on Performance Characteristics of Centrifugal Compressor

Gu, Ronglei; Ikeda, Shu‐ichi; Tanida, Kousuke; Komatsubara, Shinji; Tsujita, Hoshio; Mizuki, Shimpei

doi:10.1299/jsmekanto.2007.13.351

Cited by 1 publication

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“…In the previous studies on the control of surge in a centrifugal compressor, the injection nozzle system was employed, in which a part of the flow in the discharge duct was recirculated to the inlet of the impeller, and controlled the inceptions of rotating stall and surge [7]. Moreover, optimization of the parameters affecting on the performance of the injection nozzle system such as a position of injection has been performed [8]. Furthermore, the dependency of the optimum injection position on the rotational speed of the impeller has been investigated [9].…”

Section: Introductionmentioning

confidence: 99%

Control of Surge in Centrifugal Compressor by Using a Nozzle Injection System: Universality in Optimal Position of Injection Nozzle

Hirano

Uchida

Tsujita

2012

International Journal of Rotating Machinery

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The passive control method for surge and rotating stall in centrifugal compressors by using a nozzle injection system was proposed to extend the stable operating range to the low flow rate. A part of the flow at the scroll outlet of a compressor was recirculated to an injection nozzle installed on the inner wall of the suction pipe of the compressor through the bypass pipe and injected to the impeller inlet. Two types of compressors were tested at the rotational speeds of 50,000 rpm and 60,000 rpm with the parameter of the circumferential position of the injection nozzle. The present experimental results revealed that the optimum circumferential position, which most effectively reduced the flow rate for the surge inception, existed at the opposite side of the tongue of the scroll against the rotational axis and did not depend on the compressor system and the rotational speeds.

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Section: Introductionmentioning

confidence: 99%