Design and Analysis of Valveless Pulsejet

Abstract

In this work, a valveless pulsejet is designed using a reference for designing a valved pulsejet. The designed static thrust of the current pulsejet is 10 Lbs at standard sea level. The reference has been proved and validated experimentally for valved pulsejet but not for valveless pulsejet. The designed valveless pulsejet is then investigated numerically to check the performance. To have a better confidence level, the simulation setup was first validated by comparing its result with valveless pulsejet simulation for the same pulsejet model. The same simulation setup is then used to analyze the designed pulsejet. The simulation results show that the engine’s static thrust is 52,9 N. This thrust is 19% higher than its target. It is possibly due to two things: 1. The simulation results is too optimistic or 2. The design method, which is best for valved pulsejet, gives higher thrust when used to design a valveless pulsejet. However, since the numerical method has been validated, the higher thrust probably resulted from the used design method.