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本文建立了一种工程实用的跨音速叶栅流场分析系统,可进行跨音速叶栅无粘绕流和无粘流-边界层迭代计算。叶栅无粘绕流的计算以Denton拟流向“相对差分”方法为基础,y向采用松驰线性插值算法,所形成的解法能保证以较少的网点获得较准确的结果。边界层的计算采用积分方法,并考虑了紊流边界层的分离问题,文中还介绍了无粘流-边界层的耦合方式。应用本文方法对国内外多种压气机和涡轮叶栅进行了计算分析,所得结果与实验的吻合程度较好,因此,所提出的叶栅流场分析系统,可望为工程设计上实用的计算手段。
In this paper, a practical transonic cascade flow field analysis system is established to simulate the transonic cascades with no viscous flow and no-flow-boundary layer. The computation of cascade flow without viscous flow is based on the Denton quasi-flow “relative difference” method and the relaxation linear interpolation method in the y direction. The resulting solution can ensure more accurate results with fewer network points. The calculation of the boundary layer adopts the integral method, and the problem of the separation of the boundary layer of the turbulent flow is taken into consideration. The coupling method of the non-viscous flow-boundary layer is also introduced. In this paper, a variety of compressors and turbine cascades at home and abroad are calculated and analyzed. The results are in good agreement with the experimental results. Therefore, the proposed cascade flow field analysis system is expected to be useful for engineering design means.