Blade-to-Blade Flow at Centrifugal Impeller Exit Under Rotating Stall

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概要

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• This study presents the unsteady fluctuation measurements of impeller discharge flow for a centrifugal compressor in unstable operating region. The characteristics of the blade-to-blade flow under rotating stall were investigated by measuring unsteady velocity fluctuations at several different diffuser axial distances using a hot wire anemometer and high frequency pressure transducers mounted on the shroud wall. The flow characteristics in terms of the radial and tangential velocity components and turbulence intensity at the impeller exit were analyzed by using double phase-locked ensemble averaging techniques. During one stall period, a deep wake core was observed on the suction surface near the hub for the maximum radial velocity instant. On the other hand, large wake region existed in the middle of the passage near the shroud side. For the radial velocity increasing instant a quite strong core flow was generated at the pressure side, however, for the decreasing instant comparatively strong core flow was developed near the suction side.

• 一般社団法人日本機械学会の論文
• 2003-02-15

著者

• Kim Kwang

  Thermal Flow Control Research Center Korea Institute Of Science And Technology

• Shin You

  Thermal Flow Control Research Center Korea Institute Of Science And Technology

関連論文

• Unsteady Pressure Measurements around Rotor of an Axial Flow Fan under Stable and Unstable Operating Conditions(Experimental Mechanics in Heat and Fluid Flow)
• Blade-to-Blade Flow at Centrifugal Impeller Exit Under Rotating Stall

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