In this paper, the mechanism and parameters affecting the contact time of droplet impacting on the solid surface were studied by incorporating numerical simulation method and water spring theory. An empirical correlation of dimensionless contact time was obtained and an exploring idea with the application of wettability-controlled surface was proposed to control the contact time. The results show that, the water spring theory can be extended to the situation of droplet impacting on cylindrical surface. And the introduction of surface wettability makes this theory more adaptive. The increase of Weber number or decrease of cylinder diameter augments the anisotropy and reduces the contact time effectively. And the surface wettability has the greatest effect on the contact time. The surface wettability or anisotropy caused by geometric modification can be introduced in the surface center as much as possible to control the contact time.

结合数值模拟方法和水弹簧理论，研究了影响液滴与固体表面接触时间的机理和参数。获得了无量纲接触时间的经验相关性，并提出了利用可湿性控制表面来控制接触时间的探索思想。结果表明，水弹簧理论可以推广到液滴撞击圆柱面的情况。表面润湿性的引入使该理论更具适应性。韦伯数的增加或圆柱直径的减小增加了各向异性并有效地减少了接触时间。表面润湿性对接触时间影响最大​​。