  A new approach for the supercavitating hull optimization was proposed, which
combines the CFD simulation and analytical methods. The high-speed penetration
into water at the velocity 1 km/s was considered with the fixed body mass and
caliber. Six different axisymmetric hulls with disc, 30{\deg} and 10{\deg}
conical cavitators were simulated with the use of FLUENT at the first stage of
penetration (till the 6 m depth). The optimized hull shapes were calculated
with the use of quasi-steady approach and the characteristics obtained by CFD
simulation. The use of slender cavitators drastically decreases the local
pressures, but the higher friction drag also reduces the depth of
supercavitating penetration. Optimized conical hulls can ensure much deeper
penetration in comparison with the initial cylindrical hulls. The slenderest
cavitator with the cylindrical hull ensures small loads and very deep
penetration.
