非对称射流形成的几何理论(二)

The geometrical theory for the formation of asymmetric jet(Ⅱ)

1.
Institute of Applied Physics and Computational Mathematics, Beijing 100088, China

摘要: 将平板非对称正碰撞形成射流满足的定常方程组封闭条件推广到非正碰情况，提出了平面二维条件下非对称射流形成的一般理论，给出了射流形成的临界条件和出流射流的理论公式。对斜碰撞情形下非对称射流的出流方向、厚度随碰撞角和来流初始位形的变化规律进行了理论预测和数值模拟，理论解与二维欧拉程序的仿真结果符合较好。
- 流体力学 /
- 斜碰撞 /
- 解椭圆 /
- 非对称射流 /
- 数值模拟
Abstract: A generalized extension for the close condition of equations, which is satisfied with asymmetrical jet formation problem, is developed from head-on collision to asymmetrical oblique collision between two incoming streams. The geometrical theory of 2D planar asymmetric jet formation is presented. The critical condition and theoretical formula are obtained, which describe the formation of asymmetric jet. Variations of the width and direction of outgoing flows with collision anlge and initial configuration are theoretically predicted and numerically simulated under oblique collision. Theoretical results are in agreement with numerical results.
- solid mechanics /
- oblique collision /
- solution ellipse /
- asymmetric jet /
- numerical simulation