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Title: ターボチャージャ用遠心圧縮機内部流れの数値解析(環状溝による流動特性改善)
Other Titles: Numerical Study of the Internal Flow in a Centrifugal Compressor for Turbochargers (Improvement of Flow Characteristics by the Ring Groove Arrangement)
Authors: 坂口, 大作 / 石田, 正弘 / 植木, 弘信
Authors (alternative): Sakaguchi, Daisaku / Ishida, Masahiro / Ueki, Hironobu
Issue Date: Jan-2010
Publisher: 長崎大学工学部
Citation: 長崎大学工学部研究報告, Vol.40(74), pp.20-25 ; 2009
Abstract: In turbochargers for diesel engines, a high pressure ratio and a wide operating range are required to achieve extremely low exhaust emissions. In the present study, the ring groove arrangement was adopted to enhance a operating flow range in a centrifugal compressor for automobile turbochargers. The upstream groove was located at the casing wall of the suction pipe and the downstream groove was located at the shroud casing wall near the leading edge of the splitter blades, where both grooves were connected by an annular bypass. According to the numerical results by using ANSYS-CFX, it becomes clear that the ring groove arrangement is effective for suppression of separation at the leading-edge of main blade even in small flow rates. The reverse flow zone on the shroud casing is sucked out from downstream groove and the flow incidence at the main blade leading edge is reduced successfully by about 5 degrees due to the increased incoming flow rate.
Keywords: Numerical Simulation / Centrifugal Compressor / Range Enhancement / ANSYS-CFX
URI: http://hdl.handle.net/10069/22705
Relational Links: http://www.lb.nagasaki-u.ac.jp/reports/kougaku/preview.php?id=89
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:Volume 40, No. 74

Citable URI : http://hdl.handle.net/10069/22705

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