Numerical simulation of acoustic-vortex interactions in a large solid propellant rocket motor
- Paper number
IAC-11,C4,2,14.p1,x10390
- Author
Dr. Xiang-yu Zhang, College of Astronautics,Northwestern Polytechnical University, China
- Coauthor
Prof. Guoqiang He, Northwestern Polytechnical University, China
- Coauthor
Prof. Pei-Jing Liu, Northwestern Polytechnical University, China
- Coauthor
Prof. Qiang Li, Northwestern Polytechnical University, China
- Year
2011
- Abstract
Large length/diameter solid propellant rocket motors tend to exhibit thrust and pressure oscillations, due to a periodic vortex shedding phenomenon. In this study, a large (L/D) solid rocket motor exhibited pressure oscillatory behavior in the test and a full-scale large eddy simulation has been carried out considering combustion model of solid propellant. The simulation indicates strong coupling between the vortex shedding frequency at the first backward facing step in the flow field and the first longitudinal acoustic mode of the chamber. Another low-frequency mode is also observed in the middle and rear of the chamber. This mode is probably determined by the convection and merging pattern of the shed vortices downstream. The fine structure and curves of pressure oscillation in the position of the vortices formation and convection were analyzed. The head-end pressure oscillation correlated most to that at the first step of the chamber.
- Abstract document
- Manuscript document
(absent)