实验所得栅前平均Ma准确性的数值模拟研究

Numerical Simulation Study on the Accuracy of the Average Ma Front the Cascade

为了探究实验所得栅前平均Ma的准确性,即与中间截面真实的栅前平均Ma的差异,以某平面叶栅风洞实验段为模型,使用数值模拟技术对叶栅实验器进行全场模拟,得到实验所得栅前平均Ma是不准确的;表现在:使用实验方法得到的栅前平均Ma变化的没有中间截面处直接得到的栅前平均Ma剧烈,而且使用实验方法得的栅前平均Ma低于中间截面处的栅前平均Ma。

In order to explore the accuracy of average Ma front cascade during the wind tunnel＇ s test, for the cascade wind tunnel＇ s test section as the model, and contrast the results with the Ma got from the mid-section of the cascade tunnel. Numerical simulation technology was Used to simulate the full flow filed of the model. And it found that the average Ma which got from test was not accurate. The Ma got from the test, that the change is not so acute like which got from the mid-section, and the average Ma got from test is lower than that of the average Ma got from the mid-section.