进气道物面贴体坐标生成的几何自适应控制方法

The Geometric Self-Adaptive Controlling Method for the Boundary-Fitted Coordinate in Surface of Inlet

针对轴对称进气道跨音速绕流问题的特点，用几何自适应的方法和椭圆型方程构筑了适合流场特征的贴体坐标系，并用AF3格式计算了A－27进气道物面上的压力分布。计算结果表明：几何自适应方法能够控制进气道物面上网点的疏密，给出进气进物面上网点的良好分布，从而为进气道跨音速绕流问题的准确计算奠定了基础。

According to the property of transonic flow fields 0f axisymmetric inlet, This article generates the boundary-fitted Coordinate system, which is fit for the property of flow fields, by geometric self-adaptive meth0d and elliptic differential equations. Then the pressure distributions of A- 27 inlet are c0mputed using the implicit appr0ximate fact0rizati0n schemes 3 (in short, AF3). The numerical calculations have shown that the geometric self - adaptive method can c0ntr0l grid points in surfaces of inlet and give go0d density distribution for computing transonic nacelle flow fields of inlet.