To study the effect of heavy rainfall on the aerodynamic characteristics of gliding-guided projectiles,a model based on the Euler-Lagrange method with two-way momentum coupling,the Transition SST(shear stress transport turbulence model)and the MUSCL format with third-order accuracy were developed to calculate the aerodynamic properties of the projectiles under heavy rainfall.The results reveal that heavy rainfall creates an advective water film layer on the projectile surface,but the subsequent impact of raindrop particles on the surface results in craters forming and increasing surface roughness.The study shows that the rainstorm environment significantly impacts the lift and drag coefficients of the projectile,with a 27.39%increase in drag coefficient and an 18.09%decrease in lift coefficient observed when Ma=0.8 under a rainfall intensity of 2 200 mm/h.Additionally,the study shows that with an increase in rainfall intensity,the drag of the shell exhibits an initial increase,followed by a decrease,and then an increase again.However,this trend disappears as the projectile's flight speed increases while the lift coefficient decreases.These findings can aid in optimizing the performance of gliding-guided projectiles in adverse weather conditions.When the rain intensity remains unchanged and the projectile velocity reaches Ma=0.95,the drag coefficient increases by 32.29%and the lift coefficient decreases by 18.38%.When the projectile velocity reaches Ma=1.2,the drag coefficient increases by 21.76%and the lift coefficient decreases by 18.87%.
extreme rainfallgliding guided projectilesaerodynamic characteristicwater film
国家科技期刊平台
NSTL
万方数据
