Conversion of the supernova energy into the mechanical energy of a star cluster

A gravitational mechanism for the conversion of the energy of the expanding shell of a supernova into the energy of a star cluster is suggested. It is assumed that as long as the supernova shell continues to expand, it does not go beyond the cluster, and once its expansion has completely stopped, the shell material gets mixed with the interstellar material of the cluster. Thus, the gas does not leave the limits of the cluster, but the "bubbles" pulsating in it convert some of the supernova energy into mechanical energy of the stars. It is demonstrated that frequent supernova bursts in a dense cluster rich in gas (for example, in a galactic nucleus) provide for a substantial inflow of mechanical energy and can perceptibly affect the evolution of the cluster as a whole.