Investigation of model development for deterministic correlations associated with impeller-diffuser interactions in centrifugal compressors  

作　　者：LIU BaoJie ZHANGBo LIU YangWei 

机构地区：[1]National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics, School of Energy and Power Engineering,Beihang University [2]Collaborative Innovation Center of Advanced Aero-Engine

出　　处：《Science China(Technological Sciences)》2015年第3期499-509,共11页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.51376001,51006006,51420105008 and 51376014);the National Basic Research Program of China("973"Project)(Grant Nos.2012CB720205,2014CB046405);the Aeronautical Science Foundation of China(Grant No.2012ZB51014);the Beijing Higher Education Young Elite Teacher Project;the Fundamental Research Funds for the Central Universities

摘　　要：The average-passage equation system(APES)provides a rigorous framework to account for the deterministic unsteady effects by the so-called deterministic correlations(DC),which include both deterministic stress correlations(DCS)and deterministic total enthalpy correlations(DCH).These correlations should be modeled to close the system of equations.In this paper,the distribution of DC in a transonic centrifugal compressor is presented,and its relative importance is revealed.The assumption made by Adamczyk that the pure unsteady fluctuation is significantly smaller than the spatial fluctuation is verified at the impeller-diffuser interface.The decomposition of DCH is also discussed to determine its two different physical mechanisms.Finally,the transport equations in terms of DCS in cylindrical coordinates are derived,and the terms are evaluated to determine the ones that are necessary to model.All these analyses significantly contribute to our model development for DC in centrifugal compressors.

关 键 词：centrifugal compressors impeller-diffuser interactions deterministic correlations transport equations 

分 类 号：TH452[机械工程—机械制造及自动化] X703[环境科学与工程—环境工程]