Dynamic characteristics of multiple droplets impinging on the wall of a liquid droplet radiator

In this paper, a numerical simulation method is used to study the process of multiple droplets impact on the wall of a liquid droplet radiator in a space environment. The effects of droplet spacing, droplet velocity, wall properties and other factors on the evolution of droplet impact on the wall are analyzed. The results show that the critical Reynolds number of droplets without splashing decreases and then remains unchanged as the droplet spacing of silicone oil increases. Thin liquid film promotes droplet splashing, while thick liquid film inhibits droplet splashing. The larger the initial incident velocity of the droplets, the larger the number of splashing droplets and the smaller their diameters. The critical Reynolds number of silicone oil droplets decreases monotonously with the increase of the inclination angle between the wall and the vertical direction. Finally, a 15 frustum of a cone model is chosen to simulate the actual working process of the liquid droplet radiator to verify the conclusions. The results of the study can provide guidance for the optimal design of droplet collectors.