Abstract
A brief overview of the problem statements related to high-speed beams is given, with an emphasis on the use of analytical solutions, and the results of numerical solution of some problems of this class are described. Within the framework of kinetic theory, the processes of interaction of groups of particles (molecules) are considered on the basis of the analytical method, assuming a high correlation of particle velocities (delta function as the distribution density). The problems of the interaction of beams with and without the elimination of particles are studied numerically using the method of direct statistical modeling. For the problem with the elimination of particles (intersection and interaction of thin beams), a good agreement with the analytical solution was obtained. For the problem without the elimination of particles (collision of flows), a numerical solution of the type of traveling shock wave of extreme compression formed when the flow collides with the wall is obtained. The role of shock transformants at the initial stage of the process is shown. The problem of beam penetration into a stationary gas up to the stage of plume formation is considered, and the similarity of its initial stage with the problem of thin beams is noted. The fruitfulness of using analytical methods at the stage of primary analysis of the problem and verification of numerical solutions is emphasized.