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J055032 Unsteady Flow Structures in the Vaneless Diffuser of a Transonic Centrifugal Compressor
J055032 遷音速遠心圧縮機の羽根なしディフューザにおける非定常流れ構造(〔J055-03〕流体機械の研究開発におけるEFD/CFD(3))

Takashi NISHIZAWA, Ryuichi HASHIMOTO, Kazutoyo YAMADA, Masato FURUKAWA, Seiichi IBARAKI, Isao TOMITA
2013 The Proceedings of Mechanical Engineering Congress Japan  

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Trallsonic centri釦 gal compressors fbr automotive turbochargers operate f} om near surge limit to choke limit 」 n order to improve the perfc ) rmance , it is indispensable to understand unsteady flow phenomena in the centri血 gal compressors at off − design point . In this study , the flow fields in the vaneless diffuser of a transonic centri 血 gal compressor at ot正 」 design points have been investigated by DES ( Detached Eddy Simulation ) . The numerical simulation results show that the jet −
more » ... ke structure discharged from the impeller becomes 1arger with a decrease in the flow rate . At the disturbance onset point , the jet − wake structure flows into the scroll , so that non − uniform pressure distribution
doi:10.1299/jsmemecj.2013._j055032-1 fatcat:e4bizqoxevfllbo7cce7a6cc3a
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Takashi NISHIZAWA, Ryuichi HASHIMOTO, Kazutoyo YAMADA, Masato FURUKAWA, Seiichi IBARAKI, Isao TOMITA. "J055032 Unsteady Flow Structures in the Vaneless Diffuser of a Transonic Centrifugal Compressor." The Proceedings of Mechanical Engineering Congress Japan 2013.0 (2013) _J055032-1-_J055032-5