Abstract
Aim: Vortex valve control is increasingly important for controlling the variable thrust of SRM (solid rocket motor). Starting from our theoretical paper[9], we calculate the effects of relevant parameters on such control. Section 2 of the full paper uses the 3D numerical model to calculate the effects of geometrical structure on vortex valve control of variable thrust SRM. Subsection 2.1 analyzes the effect of the number of control gas injection orifices on the SRM performance. Subsection 2.2 discusses the effect of the diameter of the injection orifice. Subsection 2.3 presents the effect of the height of vortex chamber. Subsection 2.4 deals with the effect of the diameter of the vortex chamber. Section 3 analyzes the effects respectively of the molecular weight, flow rate and temperature of the control gas on the SRM performance. The analysis of the calculation results, given in Tables 1 through 4 and Figs. 4 and 5, shows preliminarily that; (l)the thrust modulation ratio increases with increasing mass flow rate of the control gas; (2) the SRM performance can be enhanced by reducing the diameter of the injection orifice to an appropriate level; (3) the SRM performance can also be enhanced by reducing the height of the vortex chamber but this may increase the flow loss due to increased friction between gas and wall; (4)the increase of the radius of vortex chamber can enhance the SRM performance but raises the passive mass of the SRM.
| Original language | English |
|---|---|
| Pages (from-to) | 178-183 |
| Number of pages | 6 |
| Journal | Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University |
| Volume | 27 |
| Issue number | 2 |
| State | Published - Apr 2009 |
Keywords
- Numerical simulation
- Rocket engines
- Solid rocket motor (SRM)
- Variable thrust
- Vortex valve