The possibility of improving the efficiency of the diffuser at supersonic speeds is analyzed in the research. The aim of the work is to investigate ways to increase the total pressure in the working part of the diffuser due to the reorganisation of the shock-wave structure formed by the interaction of the shock wave with the heated region. The study is carried out by means of numerical modelling of the problem in Ansys Fluent. The geometry of a diffuser with a central pipe has been proposed, and the effect of energy input on the stability of the system of shock waves has been investigated. It is found out that no strong local heating is required to create such a shock-wave structure and its control. The regime at which the pressure rise has a pulsation character is obtained and described in detail.