某型飞机表面局部压力计算

根据流场的叠加原理，用平面点源、点汇、二元直匀流叠加而成的流场模型，模拟某型飞机机身的表面流场。该流场模型的主要参数与机身几何参数一一对应，只要代入机身几何数据，就可以求出该模型的精确表达式。再根据实际飞行条件，把该流场模型转化为三元流场，根据流场特性，可以确定机身表面的压力分布规律。通过与该型飞机实验数据的比较可知，此模型及计算程序精度较高，具有普遍的适用性。

A Local Pressure Algorithm of a Certain Airplane Surface

The pressure of a certain airplane surface is calculated. Based on the superpose principle of current field, a two-dimension model with a planar point-fountain, a point-converge and a constant current of current field is established. According to the corresponding relationship between the main parameters of the model and the geometric parameters of the airframe, the model can be translated to three-dimension and expressed accurately. The rule of pressure distributing on the airframe surface can be gained from the characteristics of the current field. Finally, the contrast between the experiment and the calculation shows that the model and the procedure are exact, and the model can be used in a wide range.