Numerical Investigation of Components Length of China-Type Valveless Pulsejet

Due to its simplicity in structure and reliability in performance, the valveless pulsejet may be the most ideal low cost propulsion system for small-sized aerospace vehicle. A series of numerical simulations are performed to understand the variation of flow field and to research the performance in china type valveless pulsejet. CFD software (CFX11.0) is used to numerically predict components length´s influence on pulsejet´s performance. Evidence is provided that the frequency of china valveless pulsejet increases with the decrease of the length of the tail and the combustor. Pulsejet can´t work properly if tail length below the limitation. There is an optimized length for tail and combustor, which is the best for the performance and operation stability.