Thermophysical and gas dynamics problems of anti-meteorite protection for modern spacecrafts

The results of numerical calculations of the destruction of the protective shields of the spacecraft under the action of a micrometeorite impact are presented. A gas-dynamic numerical simulation of the process of high-speed penetration by micrometeorite of a spaced protective shield of a spacecraft has been carried out, taking into account fragmentation and the formation of a cloud of fragments after passing through the protective shield. In a three-dimensional formulation, the calculated configurations of the cloud of fragments of the impactor and the target for the initial velocities of the impactor up to 10 km/s are obtained. The high efficiency of the used design of a protective screen made of multidirectional corrugated grids as a means of fragmentation and dispersion of the kinetic energy of impact of small high-speed particles, reducing the average pressure pulse on the protected device by two to three orders of magnitude, is shown.