Volume 32 Issue 1
Jan.  2017
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Influence of diffuser on basic stage performance[J]. Journal of Aerospace Power, 2017, 32(1): 248-256. doi: 10.13224/j.cnki.jasp.2017.01.033
Citation: Influence of diffuser on basic stage performance[J]. Journal of Aerospace Power, 2017, 32(1): 248-256. doi: 10.13224/j.cnki.jasp.2017.01.033

Influence of diffuser on basic stage performance

doi: 10.13224/j.cnki.jasp.2017.01.033
  • Received Date: 2016-03-06
  • Publish Date: 2017-01-28
  • The effects of vaneless diffusers and vaned diffusers with different entrance installation angles on a centrifugal compressor basic stage were studied with numerical calculations and tests. For compressor basic stage with vaneless diffuser, inner flowfield characteristics at nearsurge point, design point, and nearchoke point were analyzed, showing that vortex existed in the inlet and outlet of impeller blade and back of reflux blade at nearsurge point while flow state was good at designpoint and nearchoke point; as for nearchoke point, friction resistance loss increased with large flow speed, causing stage efficiency drop quickly. For compressor basic stage with single arc vaned diffuser, the effects on surge margin, choke margin and efficiency were analyzed with five different vaned diffuser entrance installation angles. The results show that when entrance installation angle of vaned diffuser decreases 3 degrees than the design value while outlet installation angle is fixed, the polytropic efficiency and polytropic energetic coefficient of stage achieve the best value.

     

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  • [1]
    Dubitsky O,Japikse D.Vaneless diffuser advanced model[J].Journal of Turbomachinery,2008,130(1):125-128.
    [2]
    Aalburg C,Simpson A,Schmitz M B,et al.Design and testing of multistage centrifugal compressors with small diffusion ratios[J].Journal of Turbomachinery,2012,134(4):1667-1676.
    [3]
    Anish S,Sitaram N.Computational investigation of impeller diffuser interaction in a centrifugal compressor with different types of diffusers[J].Journal of Power and Energy,2009,223(2):167-178.
    [4]
    YANG Ce,ZHANG Dianzuo,MA Chaochen.Investigation into the interaction of centrifugal compressor impeller and vaneless diffuser[J].Journal of Beijing Institute of Technology,2006,15(3):273-277.
    [5]
    高丽敏,刘波,王欢.无叶扩压器对离心压缩机流场及性能影响的数值研究[J].中国机械工程,2008,19(17):2098-2102. GAO Limin,LIU Bo,WANG Huan.Numerical investigation of the influence of vaneless diffusers on the flow and performance of a centrifugal compressor[J].Journal of China Mechanical Engineering,2008,19(17):2098-2102.(in Chinese)
    [6]
    高丽敏,席光,王尚锦,等.用热线风速仪测量叶轮后叶片扩压器流场[J].工程热物理学报,2005,26(4):599-601. GAO Limin,XI Guang,WANG Shangjin,et al.Experimental investigation on a vaned diffuser flowfield behind a centrifugal impeller using constant temperature anemometer[J].Journal of Engineering Thermophysics,2005,26(4):599-601.(in Chinese)
    [7]
    刘海清,张宏武,高闯.某带无叶扩压器的离心压缩机内部流动特性与稳定性分析[J].风机技术,2013(4):17-22. LIU Haiqing,ZHANG Hongwu,GAO Chuang.Analysis of flow field and stability in a centrifugal compressor with vaneless diffuser[J].Compressor Blower and Fan Technology,2013(4):17-22.(in Chinese)
    [8]
    Reddy T C,Murty G V,Prasad M V,et al.Experimental studies on the effect of impeller width on centrifugal compressor stage performance with low solidity vaned diffusers[J].Journal of Power and Energy,2007,221(4):519-533.
    [9]
    Ziegler K U,Gallus H E,Niehuis R.A study on impellerdiffuser interaction:Part Ⅰ influence on the performance[J].Journal of Turbomachinery,2003,125(1):173-182.
    [10]
    Ziegler K U,Gallus H E,Niehuis R.A study on impellerdiffuser interaction:Part Ⅱ detailed flow analysis[J].Journal of Turbomachinery,2003,125(1):183-192.
    [11]
    Jongsik O,Agrawal G L.Numerical investigation of low solidity vaned diffuser performance in a high pressure centrifugal compressor:Part Ⅰ influence of vane solidity[R].ASME Paper 2007-GT-27260,2007.
    [12]
    Jongsik O,Buckley C W,Agrawal G L,et al.Numerical investigation of low solidity vaned diffuser performance in a highpressure centrifugal compressor:Part Ⅰ influence of vane stagger[R].ASME Paper 2008-GT-50178,2008.
    [13]
    Jongsik O,Buckley C W,Agrawal G L,et al.Numerical investigation of low solidity vaned diffuser performance in a highpressure centrifugal compressor:Part Ⅲ tandem vanes[J].Journal of Turbomachinery,2012,134(6):061025.1-061025.8.
    [14]
    Gaetani P,Persico G,Mora A,et al.Impellervaned diffuser interaction in a centrifugal compressor at off design conditions[J].Journal of Turbomachinery,2012,134(6):061034.1-061034.9.
    [15]
    Gaetani P,Persico G,Mora A,et al.Impellervaned diffuser interaction in a centrifugal compressor at the best efficiency point[R].ASME Paper 2011-GT-46223,2011.
    [16]
    Gallier K,Lawless P B,Fleeter S.Particle image velocimetry characterization of highspeed centrifugal compressor impellerdiffuser interaction[J].Journal of Propulsion and Power,2010,26(4):784-789.
    [17]
    Khalfallah S,Ghenaiet A.Analyses of impellervanelessdiffuserscroll interactions in a radial compressor[J].Journal of Power and Energy,2010,224(6):851-867.
    [18]
    舒信伟,陈婷.分流叶片位置对离心压缩机级内部流动和性能影响的数值研究[J].流体机械,2015,43(9):31-35. SHU Xinwei,CHEN Ting.Numerical investigation of the influence of the splitter position on the flowfield and performance of a centrifugal compressor stage[J].Journal of Fluid Machinery,2015,43(9):31-35.(in Chinese)
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