为开展确定应力耦合效果的研究,基于三维定常Denton程序发展了三维非定常计算程序,以多级跨声速压气机近失速点为算例,进行确定应力耦合精度的研究。除定常计算和非定常计算外,还采用了三种计算方式,分别是多级环境下非定常时均方程耦合确定应力的解(COU2),提取非定常精确解时均的值作为S2进口边界条件进行单独S2计算域的定常计算(ST1);在ST1基础上耦合确定应力的解(COU1)。结果表明:三维压气机算例中出口总压和马赫数的径向曲线对比显示COU1的误差水平分别为ST1的53%和34%;验证了确定应力项的耦合可以使定常计算的结果更接近非定常计算的时均解;对比发现ST1计算精度较COU2高,误差水平分别降低至37%和32%。说明在该算例中精确的边界条件比精确的确定应力发挥更大的作用。非定常时均结果中近压力面的熵值比近吸力面的熵值要高,反映出非定常相互作用中上游尾迹向压力面迁移的效应,Adamczyk时均方程耦合确定应力后得到了类似的结果。 In order to study the effect of stress coupling, a three-dimensional unsteady calculation program is developed based on the three-dimensional steady Denton program. A multi-stage transonic compressor near stall point is taken as an example to study the stress coupling accuracy. In addition to the regular and unsteady calculations, three computational methods are also used, which are COU2 solutions for the coupled unsteady mean-time equations in a multistage environment and the values ​​obtained when the unscented exact solutions are extracted as the S2 import boundary Condition Calculate the steady state of individual S2 calculation domain (ST1). Coupled with ST1 to determine the stress solution (COU1). The results show that the comparison of radial curves of total outlet pressure and Mach number in three-dimensional compressor shows that the error level of COU1 is 53% and 34% of that of ST1, respectively. It is verified that the coupling of determining stress term can make the result of stationary calculation closer Compared with COU2, the error of ST1 was reduced to 37% and 32% respectively. It shows that the precise boundary conditions in this study play a bigger role than the accurate determination of stress. In the unsteady time-averaged result, the entropy value of the near-pressure surface is higher than that of the near-suction surface, which reflects the migration of upstream wake to the pressure surface in the unsteady interaction. Adamczyk’s time- result.