Mathematical model and computer program development for online modeling of pulse jet engine working cycle, parameters, and characteristics

The work is devoted to the development of a mathematical model and a program for online modeling of the pulse jet engine working cycle and characteristics to assess the possibility of its use on unmanned aerial vehicles. The developed universal thermodynamic model describes the instantaneous change in pressure and temperature, taking into account the mixing of flows, combustion, and heat exchange in the combustion chamber of valved and valveless types of pulse jet engines, as well as the flows through the pipes and reed valves of various designs. Unlike the known works, a special online program, Pulsejet-Sim, for pulsejet modeling by a wide range of users has been developed for the first time, which is posted on a special website as a web-oriented software service that does not require downloading to the user’s computer and allows for instant calculation using server resources and secure data cloud storage. Using the developed software, preliminary mathematical modeling of known samples of pulse jet engines was performed, which showed generally satisfactory qualitative and quantitative agreement of the modeling results (error less than 10%) with the available experimental data on thrust, specific fuel consumption, cycle frequency, and other parameters.