Departmental Bulletin Paper 吹込みノズルによる遠心圧縮機のサージングの制御:ノズル周方向開口幅の影響

山瀬, 英之

57pp.1 - 7 , 2016-03-24 , 法政大学大学院 理工学・工学研究科
ISSN:2187-9923
Description
In the present study, in order to examine the effect of nozzle opening width in circumferential direction of impeller on the extension of the stable operating range of centrifugal compressor with the nozzle injection system, the cross-section of injection nozzle was modified from a circular shape to a semi-doughnut ne, in which the shape of cross-section was specified by the arc length in the circumferential direction of the inner wall of the suction pipe and the height in the radial direction measured from the inner wall. The performance tests for the centrifugal compressor with the nozzle injection system were carried out by using the four types of injection nozzles with the semi-doughnut cross-section which were different in the arc length in the circumferential direction but had the same cross-sectional area as that of the nozzle with the circular cross-section. The present experimental results showed that the expansion of nozzle opening width in ircumferential direction with the fixed cross-sectional area moved the flow rate at surge inception to the higher flow rate. Key Words : Centrifugal Compressor, Nozzle Injection, Surge
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http://repo.lib.hosei.ac.jp/bitstream/10114/12338/1/14R1138%e5%b1%b1%e7%80%ac%e8%8b%b1%e4%b9%8b.pdf

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