Research on problem of deterministic stress coupling in transonic compressor

Two-dimensional steady/unsteady, and three-dimensional unsteady calculation programs were developed based on three-dimensional steady Denton program. Researches on deterministic stress coupling were conducted on two cases: two-dimensional transonic compressor cascade and three-dimensional single-stages transonic compressor near stall point. It is found that, there are some deviations from time-averaged value of solution and unsteady solution of time-averaged equations when deterministic stresses are applied to coupling processing. The deviation of the coupling error originated from three sources: spatial difference discrete, viscosity correlation terms, mixing-plane processing. In multi-row coupling cases, the influences of mixing-plane are vital. It has a vital effect on the coupling calculation results. The simple mixing-plane processing can't get an ideal effect.