An approach to the mathematical modeling of an aircraft power plant with a piston engine

Abstract

The peculiarity of the approach, presented in this article, to the mathematical modeling of a power plant (PP) based on an aircraft piston engine (APE) with a supercharger is the absence of a thermodynamic calculation of the APE for power strokes, due to the direct setting of the diagram completeness coefficient. This approach simplifies the modeling of the APE workflow, with sufficient accuracy of the results within the framework of the task assigned to the author. The theoretical aspects of this approach are adopted from the methodology for calculating the characteristics of the APE by M.M. Maslennikov, on the basis of which the presented mathematical model (MM) of the PP with an APE was developed. To understand the structure of the developed MM, the procedure for organizing the calculation of the parameters and characteristics of the PP with an APE is described, conventionally divided into three stages: thermal calculation, calculation of altitude-speed characteristics (ASC) and calculation of external characteristics. When describing the MM, attention is paid to the features of calculating the parameters of the work process using generalized dependencies, as well as diesel engines. The results obtained using the developed MM of the PP with an APE for reliability and adequacy were checked by comparing the calculated data with data from the technical description of the Yak-18T aircraft with a PP based on the M-14P APE