Study of modeling unsteady blade row interaction in a transonic compressor stage part 2:influence of deterministic correlations on time-averaged flow prediction  

作　　者：Yang-Wei Liu Bao-Jie Liu Li-Peng Lu 

机构地区：[1]Group 404,National Key Laboratory of ScienceTechnology on Aero-Engine Aero-thermodynamics,School of Jet Propulsion,Beihang University,100191 Beijing,China

出　　处：《Acta Mechanica Sinica》2012年第2期291-299,共9页力学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (51006006,51136003,50976010,50976009);the National Basic Research Program of China (2012CB72 0205);the Aeronautical Science Foundation of China (2010ZB51);the 111 Project (B08009);the National Science Special Foundation for Post-doctoral Scientists of China (201104049)

摘　　要：The average-passage equation system （APES） provides a rigorous mathematical framework for account- ing for the unsteady blade row interaction through multistage compressors in steady state environment by introducing de- terministic correlations （DC） that need to be modeled to close the equation system. The primary purpose of this study was to provide insight into the DC characteristics and the in- fluence of DC on the time-averaged flow field of the APES. In Part 2 of this two-part paper, the influence of DC on the time-averaged flow field was systematically studied; Several time-averaging computations boundary conditions and DC were conducted with various for the downstream stator in a transonic compressor stage, by employing the CFD solver developed in Part 1 of this two-part paper. These results were compared with the time-averaged unsteady flow field and the steady one. The study indicat;d that the circumferential- averaged DC can take into account major part of the unsteady effects on spanwise redistribution of flow fields in compres- sors. Furthermore, it demonstrated that both deterministic stresses and deterministic enthalpy fluxes are necessary to reproduce the time-averaged flow field.The average-passage equation system （APES） provides a rigorous mathematical framework for account- ing for the unsteady blade row interaction through multistage compressors in steady state environment by introducing de- terministic correlations （DC） that need to be modeled to close the equation system. The primary purpose of this study was to provide insight into the DC characteristics and the in- fluence of DC on the time-averaged flow field of the APES. In Part 2 of this two-part paper, the influence of DC on the time-averaged flow field was systematically studied; Several time-averaging computations boundary conditions and DC were conducted with various for the downstream stator in a transonic compressor stage, by employing the CFD solver developed in Part 1 of this two-part paper. These results were compared with the time-averaged unsteady flow field and the steady one. The study indicat;d that the circumferential- averaged DC can take into account major part of the unsteady effects on spanwise redistribution of flow fields in compres- sors. Furthermore, it demonstrated that both deterministic stresses and deterministic enthalpy fluxes are necessary to reproduce the time-averaged flow field.

关 键 词：UNSTEADY Blade row interaction Compressor Deterministic correlation Average-passage equation system CFD 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程] TB877[一般工业技术—摄影技术]