跨声速风洞现代试验设计方法应用研究

In order to overcome the shortages of the one factor at a time (OFAT) wind tunnel tests, such as slow test efficiency, neglected variable interaction, and indirect expression of test results, a modern design of experiment (MDOE) method for wind tunnel experiments has been performed in a 2.4m×2.4m transonic wind tunnel. In this paper, the test space dividing, test data number calculating and data point distributing have been illustrated. The aerodynamic coefficients at tested points have been acquired through wind tunnel experiments. The response surface model has been established, and its accuracy has been verified by checking the additional acquisition data points within the 95% confidence interval. The results indicate that the proposed MDOE method only uses 20 percent of data points and 50 percent of experimental time of traditional methods. This method possesses a better performance in describing experiment results, providing response results, and revealing variable interaction relationship.