unsteady characteristic research of startup and cutoff process of secondary hot gas injection thrust vector control system
- Paper number
IAC-08.C4.1.11
- Author
Ms. min xiang, China
- Year
2008
- Abstract
Start-up and cutoff of hot gas secondary injection thrust vector control system of Solid Rocket Motor are simulated numerically with three-dimensional unsteady flow model. The influence of hot gas bleeding and secondary injecting in transient process on internal flow filed and interior ballistic performance of Solid Rocket Motor is investigated in order to clear about dynamic characteristics of the flow field and influence on flow field structures, flow parameters and system performance. In the unsteady characteristic of startup process of secondary hot gas injection thrust vector control system, the distribution and change of flow parameters in the main/second flow interaction section present complex diversity. During the process of startup, visible difference on dynamic performance is displayed, compared with the situation of steady operation. Especially lateral control force, chamber pressure and motor thrust are changed remarkably. The effect of unsteady characteristic should be paid attention in aero craft design. In the unsteady characteristic of shutoff process of hot gas secondary injection thrust vector control system, the strong pressure oscillation occurs in the flow field about the hot gas ejecting hole and secondary hot gas injection hole. Dynamic load resulted from unsteady process should bring structure oscillation of aero craft. Residual influence of jet flow disturbing force is obvious and reduces with the time slowly. The effect of unsteady delayed characteristic should be paid attention in control design. Therefore, conclusions obtained above provide technical guidance for future research on hot gas secondary injection thrust vector control system.
- Abstract document
- Manuscript document
IAC-08.C4.1.11.pdf (🔒 authorized access only).
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