Numerical method by solving Reynolds-averaged Navier-Stokes equations is presented to solve the vertical high-speed water entry problem of a cone-cylinder. The results of the trajectory and cavity shape agree well wit...Numerical method by solving Reynolds-averaged Navier-Stokes equations is presented to solve the vertical high-speed water entry problem of a cone-cylinder. The results of the trajectory and cavity shape agree well with the results obtained by the analytical model from literatures. The velocity of the projectile decays rapidly during the penetration,which is about 90% losing in 80D penetration depth. Pressure distributions are also discussed and the results show that the largest pressure appears on the tip of the cone and the lowest pressure occurs inside the cavity and causes vapor generation. For inside the cavity,there is always a supplement of air from outside before the splash closed,after that,the cavity is mainly filled with vapor.展开更多
基金Sponsored by the Special Fund Project for Technology Innovation Talent of Harbin(Grant No.2013RFLXJ007)the Fundamental Research Funds for the Central Universities(Grant No.HIT.NSRIF.201159)
文摘Numerical method by solving Reynolds-averaged Navier-Stokes equations is presented to solve the vertical high-speed water entry problem of a cone-cylinder. The results of the trajectory and cavity shape agree well with the results obtained by the analytical model from literatures. The velocity of the projectile decays rapidly during the penetration,which is about 90% losing in 80D penetration depth. Pressure distributions are also discussed and the results show that the largest pressure appears on the tip of the cone and the lowest pressure occurs inside the cavity and causes vapor generation. For inside the cavity,there is always a supplement of air from outside before the splash closed,after that,the cavity is mainly filled with vapor.
