Abstract
In order to discover the mechanism of thrust oscillation characteristics in solid rocket motors, large-eddy simulation with Wall-Adapting Local Eddy-Viscosity subgrid-scale turbulence model is carried out to study the oscillating flow field induced by obstacle vortex shedding based on the subscale motor of P230. An integrated method is presented to describe the relationship between thrust amplitude and pressure amplitude. The results indicate that the ratio of thrust amplitude to pressure amplitude is mainly determined by the throat to port area ratio J, and it varies inversely as J. It is concluded that odd-order acoustic modes have the greatest contribution to the thrust amplitude, while the effect of even order acoustic modes on thrust amplitude can be ignored. The contribution of vortex-shedding to the thrust amplitude is less than that of the odd order acoustic modes, and it increases with the level of vortex sound coupling.
| Original language | English |
|---|---|
| Pages (from-to) | 835-841 |
| Number of pages | 7 |
| Journal | Yuhang Xuebao/Journal of Astronautics |
| Volume | 32 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Apr 2011 |
Keywords
- Solid rocket motor
- Throat to port area ratio
- Thrust oscillation
- Vortex/sound coupling