液滴─固壁高速撞击问题的流体动力学分析

将液滴—固壁撞击的流体动力学过程分为两个阶段。对于第一阶段运用矢量分析和激波理论关系，建立了适用于高速撞击条件的非线性激波模型。该模型克服了传统理论的局限性，能够在宽广的速度范围内计算所有撞击参数，同时能考虑固体的可压缩性。计算结果与已有的实验值吻合良好。模型采用无量纲形式，极适用于工程实际。

HYDRODYNAMIC STUDY ON HIGH-SPEED COLLISION OF A LIQUID DROPLET WITH A SOLID PLANE

The dynamics of high-speed impact of a compressible liquid droplet with a solid surface is investigated analytically.Vector analysis and shock wave theory are applied to the initial phase during which the contact periphery expands more quickly than the compression wave fronts in the droplet.The presented work develops a nonlinear model that takes the convective motion of the liquid and compressibility of the solid into account.All impact parameters can be calculated.A good agreement of the calculated results with available experimental data for water is found.This new model is non-dimensional and suitable for engineering application.