S弯扩压器中四种湍流模型的比较.pdfVIP

23 10 Vol. 23 No. 10 2008 10 Journal of Aerospace Power Oct . 2008 : 2008) S 张丽芬, 刘振侠, 吕亚国 ( , 710072) : Realizable , SA ( SpalartA llmar a ) , SST ( Shear tre tr an port ) , RSM ( Reynold tre equation model ) S , . , : , ; SA , RSM , SST RSM ; . , . : ; S ; Realizable ; SA ( SpalartA llmara ) ; SST ( Shear tre tran port ) ; RSM ( Reynold tre equation model ) : V 211. 48; V2 11. 3 : A Comparison of four turbulence models in diffusing Sduct ZHA NG Lifen, LIU Zhenx ia, L Yaguo ( Scho ol of Pow er and Energy, Northw e tern Polytechnical Univer ity, Xi an 710072, China) Abstract: Four turbulence m odel : Realizable , SA ( Spalar tAllmara ) , SST ( Shear tr e tr an port) and RSM ( Rey nold tre equatio n m odel) , w ere co mpar ed by imulating eparated flow in a diffu ing Sduct . The numerical re ult how the capability of each tur bulence mo del in dealing w ith eparatio n. Before epar ation, the predicted re ult agree w ell w ith ex perim ent for four model , but in eparated reg io n, the turbulence model ha impor tant eff ect in imulating eparation. SST m odel i co mpared to RSM in imulating eparatio n and pre ur e coefficient, how ever not a clearly a RSM . SA m odel under predict the epa ratio n and the eparated r eg ion i m aller than experiment . Mach number i higher than ex perimental data for four m odel . Pr e ure recov erie are im ilar for different m odel , and ar e w ithin 0. 7% agreement w ith experimental data. Key