离心压气机确定应力场分析
Analysis of deterministic stresses in a centrifugal compressor
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摘要: 采用定常和非定常数值模拟技术,研究了某跨声离心压气机内的固有非定常流动.对比分析了定常流场和非定常时均流场之间的差别,着重分析了通道内确定应力的分布规律以及交界面确定应力的分布特点.结果表明,叶轮和扩压器中的确定应力在数值上相当,通道内的确定应力沿周向分布有较大的梯度、沿流向分布的总体趋势是从交界面向两侧迅速衰减,交界面处的确定应力和其空间相关项之间在数值上存在一定的偏差.Abstract: Steady and unsteady simulations were conducted in the investigation of deterministic unsteady phenomenon in a transonic centrifugal compressor with splitter blade.Results from the steady and unsteady simulations were compared firstly and then the distributions of deterministic stresses in the blade passage and the components of deterministic stresses based on velocity decomposition at the impeller/diffuser interface were studied in depth.The study indicates that the deterministic stresses in the impeller and diffuser are of similar magnitudes,and that the stresses in the passage have large gradients in circumferential direction and decrease rapidly from the interface towards two sides in flow direction,and also shows that the spatial correlations have some discrepancies with the deterministic stresses at the impeller/diffuser interface.
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[1] Krain H.A study on centrifugal impeller and diffuser flow[J].Journal of Engineering for Power,1981,103:688-697. [2] Martin P,Mohamad S.A numerical investigation of the unsteady flow in centrifugal stages[R].ASME 2000-GT-426. [3] Shum Y K P,Tan C S,Cumpsty N A.Impeller-diffuser interaction in a centrifugal compressorFJ].ASME J.Turbomach,2000,122:777-786. [4] Adamczyk J J.Model equation for simulation flows in multistage turbomachinery[R].ASME Paper 86-GT-226. [5] Adamczyk J J,Mulac R A,Celestina M L.A model for closing the invisid form of the average passage equation system[J].Journal of Turbinemachinery,1986,108 (2):180-186. [6] Rhie C M,Gleixner A J,Fischberg C J,et al.Development and application of a multistage Navier-Stokes solver Part 1:Multistage modeling using body-forces and deterministic stresses[R].ASME Paper 95-GT-342. [7] Sondak D L,Dorney D J,Davis R L.Modeling turbomaehinery unsteadiness with lumped deterministic stresses[R].AIAA-96-2670. [8] Hall E J.Aerodynamic modeling of multistage compressor flow fields Part 2:Modeling deterministic stresses[J].Proc.Instn Mech.Engrs,Part G,Journal of Aerospace Engineering,1998,212(G2)..91-107. [9] He L,Ning W.Efficient approach for analysis of unsteady viscous flows in turbomachines[J].AIAA Journal,1998,36(11):2005-2012. [10] Van de Wall A G,Kadamhi J R,Adamczyk J J.A transport model for the deterministic stresses associated with turbo-machinery blade row interaction[J].Journal of Turboma-chinery,2000,122:593-603. [11] 季路成.轴流式叶轮机转子/静子干扰非定常流动探索研究[D].北京;北京航空航天大学,1998.JI Lucheng.Exploration on rotor/stator interaction unsteady flow in axial turbomachinery[D].Beijing:Beijing University of Aeronautics and Astronautics,1998. [12] 高丽敏.离心压缩机级内流动的数值分析与实验研究[D].西安:西安交通大学,2002.GAO Limin.Numerical &experimental study on the three-dimensional flow field inside centrifugal compressor stage[D].Xi'an:Xi'an Jiaotong University,2002. [13] 柳阳威,刘宝杰.跨声压气机确定应力场分析[J].航空学报,2007,28(增刊):1-6.LIU Yangwei,LIU Baojie.Analysis of deterministic stresses in a transonic compressor[J].Acta Aeronautica et Astronautica Sinica,2007,28 (Sup.):1-6.
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