时间倾斜算子在离心压缩机动/静相干非定常模拟中的应用  

APPLICATION OF THE TIME-INCLINED OPERATOR ON THE UNSTEADY NUMERICAL SIMULATION IN CENTRIFUGAL COMPERSSOR

作　　者：周莉[1] 席光[1] 高丽敏[1] 王尚锦[1] 

机构地区：[1]西安交通大学能源与动力工程学院,陕西西安710049

出　　处：《工程热物理学报》2005年第5期770-772,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50276047)

摘　　要：本文介绍了用时间倾斜算子来处理非定常计算中非等栅距的方法。通过引入时间倾斜算子对N-S方程进行转化,而不对几何结构作任何改变,且所计算的叶片通道数小,以确保有较好的计算效率。粘性的影响被归类到源项中来进行求解,在作时间倾斜的方程转换时,就不用忽略粘性应力项的影响,使得方程的求解更为真实。同商用软件的计算结果进行了比较,结果表明应用本文所发展的程序,能很好的预测离心压缩机级的非定常流动。A numerical method for the calculation of unsteady stator/rotor interaction in turbomachinery stage of arbitrary pitch ratio using time-inclined operator is presented. It is developed on the basis of the program solving the three dimensional, viscous, steady flowfield in the centrifugal compressor. Dual time-stepping is adopted to realize the unsteady simulation; time-inclined operator is employed to transform the Navier-Stokes equations. It is realized without an approximation to a ratio of small integers or to scale geometry, the passages used for computation are minimum, and the computation time is also small. The results using time-inclined operator are also compared with the computation using NUMECA. It shows the program developed by the author can predict the flowfield in the centrifugal compressor accurately.

关 键 词：时间倾斜算子 非等栅距 非定常 双时间步 

分 类 号：TK474[动力工程及工程热物理—动力机械及工程]