The article discusses a microturbine used as a power unit for wheeled vehicles operating in difficult operating conditions, including exposure to high and low temperatures, strong electromagnetic fields and radiation. The results of a study of the impellers of a reversible microturbine using computer and physical modeling methods are presented. Various design solutions of impellers are described. Visual materials demonstrating the flow pattern of the working fluid and the spatial distribution of the flow velocity are presented. Areas of low efficiency of the working volume have been identified.