三角形绕流问题的分析解

三角形截面导弹气动性能的研究主要依靠实验，理论研究尚显不足。该文构造了一种从圆柱绕流到三角形绕流的近似解析变换，给出了复势、复速度、压力系数的表达式与典型算例。这种变换可便捷地给出三角形绕流的流动图谱、流速分布以及压力系数分布。其结果对认识三角形绕流以及其他非圆截面气动性能的研究具有重要意义。

An Analytical Solution to the Triangular Flow

The aerodynamic characteristic for the triangular body missiles has been investigated chiefly by experiments, whereas its theoretical study is still not sufficient. In this paper, an analytical transformation function from the cylindrical flow to the triangular flow has been constructed. The formulae of the complex potential, the complex velocity, and the pressure coefficient in the triangular flow are derived, and some typical expamples have also been given. Using this transformation, the flow pattern, the velocity distribution and the pressure coefficient in the triangular flow can be given conveniently. The results are important for understanding triangular flow and for studing aerodynamic characteristic of other noncircular body.