可压缩流中变形氧化铝液滴曳力系数数值研究

In view of the solid rocket motor nozzle，the volume of fluid (VOF) method was used to simulate the droplet-gas two-phase flow，and the fuzzy theory and proportional differential control (PD) method were combined to control the droplet to reach a quasi-static state， so as to study the force characteristics of deformable alumina droplet in the flow field. The results showed that the fuzzy theory coupled with PD controller can make the droplet reach the quasi-steady state more efficiently and stably. The drag coefficient of the droplet increased with the increase of deformation degree and the relative Mach number between the flow field and the droplet，and there was no significant coupling between the relative Mach number and Weber number. The effect of droplet deformation and compressibility of flow field on gas-liquid phase interaction should be considered in accurate calculation of two-phase flow field for solid rocket motor. Compared with the drag coefficient model of the rigid sphere，droplet deformation could cause more thrust loss in the gas phase of solid rocket motor nozzle，and also result in smaller particle-free zone in the nozzle.