Abstract: A new combined power generation scheme based on the Brayton cycle and the semiconductor thermoelectric principle is proposed for the high temperature shell of the flying vehicle combustor. A theoretical model is built and a computational analysis of the temperature is carried out. The calculation results of a key node of the Brayton cycle and the temperatures of the semiconductor thermoelectric generator are used to calculate the overall generation capacity and the basic performance parameters of the combined generation system. The result may provide some guidance and reference for the applications of combined generation technology for aerospace vehicles.