The Experts below are selected from a list of 315 Experts worldwide ranked by ideXlab platform

Yoonjei Hwang - One of the best experts on this subject based on the ideXlab platform.

  • Study on the performance of a centrifugal compressor considering running tip clearance
    International Journal of Refrigeration, 2016
    Co-Authors: Changhee Kim, Horim Lee, Changmin Son, Jangsik Yang, Yoonjei Hwang
    Abstract:

    A series of aero-thermo-mechanical analyses were carried out to predict the running tip clearance and the effects of impeller deformation on the performance using two different centrifugal compressors (blade type A and B). In operation, impeller deformation due to the combination of centrifugal force, aerodynamic pressure and thermal load results in non-uniform tip clearance profile. The results show that the maximum displacement occurs at the leading edge tip of the impeller blade but maximum stress takes place at the blade root of the impeller. A significant reduction of the tip clearance height has occurred at the leading edge and the trailing edge of the impeller. Due to the reduction of the tip clearance, the tip leakage flow has decreased by 19.4% and 16.2% in the blade type A and B, respectively. The Polytropic Efficiency of blade type A and B at operating condition has increased by 0.72% and 1.81%, respectively.

Changhee Kim - One of the best experts on this subject based on the ideXlab platform.

  • Study on the performance of a centrifugal compressor considering running tip clearance
    International Journal of Refrigeration, 2016
    Co-Authors: Changhee Kim, Horim Lee, Changmin Son, Jangsik Yang, Yoonjei Hwang
    Abstract:

    A series of aero-thermo-mechanical analyses were carried out to predict the running tip clearance and the effects of impeller deformation on the performance using two different centrifugal compressors (blade type A and B). In operation, impeller deformation due to the combination of centrifugal force, aerodynamic pressure and thermal load results in non-uniform tip clearance profile. The results show that the maximum displacement occurs at the leading edge tip of the impeller blade but maximum stress takes place at the blade root of the impeller. A significant reduction of the tip clearance height has occurred at the leading edge and the trailing edge of the impeller. Due to the reduction of the tip clearance, the tip leakage flow has decreased by 19.4% and 16.2% in the blade type A and B, respectively. The Polytropic Efficiency of blade type A and B at operating condition has increased by 0.72% and 1.81%, respectively.

Jian-feng Li - One of the best experts on this subject based on the ideXlab platform.

  • Effection of non-uniform entrance velocity profile on flow performance of centrifugal compressor stage
    Kung Cheng Je Wu Li Hsueh Pao Journal of Engineering Thermophysics, 2009
    Co-Authors: Z. X. Liu, G.l. Wang, Jian-feng Li
    Abstract:

    Based on the technology of CFD, the function of UDF was used to link the program of nonuniform entrance velocity profile with the core solver of CFD. The numerical simulation of the stage performance of centrifugal compressor in non-uniform entrance velocity profiles was carried out. In whole operating region, the Polytropic Efficiency and energy coefficient curves of non-uniform entrance velocity along radial and tangential direction were compared and analyzed in detail. The changing of performance affected by entrance conditions was gained and analyzed combining the corresponding internal flow field. It will offer a valuable guide to optimize the operating condition of centrifugal compressor stage.

Zhao Hong-min - One of the best experts on this subject based on the ideXlab platform.

  • Numerical Study of Flow Performance Affected by Non-uniform Entrance Velocity Profile in Centrifugal Compressor Stage
    Fluid Machinery, 2008
    Co-Authors: Zhao Hong-min
    Abstract:

    Based on the technology of CFD,the function of UDF was used to link the program of non-uniform entrance velocity distribution with the core solver of CFD.The numerical simulation of the stage performance of centrifugal compressor in non-uniform entrance velocity profile was carried out.In full working condition,the Polytropic Efficiency and energy coefficient curve of stage performance under non-uniform entrance velocity distribution alone radial direction were compared and analyzed in detail.The change trend of performance was gained in two kinds of entrance condition.It would offers reference to control working condition of centrifugal compressor.

Changmin Son - One of the best experts on this subject based on the ideXlab platform.

  • Study on the performance of a centrifugal compressor considering running tip clearance
    International Journal of Refrigeration, 2016
    Co-Authors: Changhee Kim, Horim Lee, Changmin Son, Jangsik Yang, Yoonjei Hwang
    Abstract:

    A series of aero-thermo-mechanical analyses were carried out to predict the running tip clearance and the effects of impeller deformation on the performance using two different centrifugal compressors (blade type A and B). In operation, impeller deformation due to the combination of centrifugal force, aerodynamic pressure and thermal load results in non-uniform tip clearance profile. The results show that the maximum displacement occurs at the leading edge tip of the impeller blade but maximum stress takes place at the blade root of the impeller. A significant reduction of the tip clearance height has occurred at the leading edge and the trailing edge of the impeller. Due to the reduction of the tip clearance, the tip leakage flow has decreased by 19.4% and 16.2% in the blade type A and B, respectively. The Polytropic Efficiency of blade type A and B at operating condition has increased by 0.72% and 1.81%, respectively.