等效动压洞壁干扰修正方法的研究与应用

Research and Application on Wall Interference Correction Method of Equivalent Kinetic Pressure

带螺旋桨飞机模型风洞实验进行洞壁干扰修正时 ,必须考虑螺旋桨滑流的影响。运用等效动压法对运八飞机带螺旋桨模型风洞实验数据进行洞壁干扰修正 ,分析洞壁对带螺旋桨飞机模型试验数据的影响 ,并与壁压信息修正方法进行了比较。两种修正方法的修正结果基本一致 ,壁压信息法能实际反映洞壁干扰影响 ,但壁压信息法需要进行准确的壁压测量 ,增加实验工作量 ;等效动压法是以经典的洞壁干扰修正公式为基础 ,考虑了螺旋桨滑流的影响 ,而且带螺旋桨飞机模型实验的迎角一般在中等迎角以下 ,不会出现像大迎角那样的分离特性 。

The effect of propeller induced slipstream to the experiment data must be corrected. In this paper, the wall correction method of equivalent kinetic pressure and wall pressure signature correction method are used to correct the wall interference from wind tunnel experiment of scaled Y8 model with propellers. The author analyses the effect of the wall to the experiment data. Moreover, the difference of the different correction methods for model with propellers is analyzed. The results of the two wall correction methods are similar overall. Walls pressure signature correcting method responses the effect of the wall interference actually. However, it needs accurate measuring pressure and increases lots of work. The wall correction method of equivalent kinetic pressure is based on the classical wall correction method of equivalent kinetic pressure is more simple and applicable.