关键词: 风洞实验, 翼型, 数据处理, 洞壁干扰修正

Abstract: In the conventional airfoil tests using, end-plates, the free vortex may be drawn around end-plates. Based on the experimental observations, the vortex system model for such an airfoil test was established. Using the model, the effective aspect ratio of the wins with the end-plates may be found, and then the results can be transformed into 2 -D data by lifting line theory and the wall interference can be corrected by image method. Even for the pressure results on middle sections of the model with end plates, 2-D transformation and wall correction are necessary, in the way similar to force tests. Such the data reduction process will ensure accurate and reliable airfoil results. Some experimental demonstration evidences are presented in this paper for several different airfoils in two wind tunnels with close and open jet respectively.

Key words: Wind tunnel tests, airfoils, data processing, Wind tunnel correction