Abstract
The unsteady numerical study of the mixed-compression inlet restarting flow with the single square pulse injection was performed. The results show that mass flow entering the inlet decreased and external normal shock is swallowed into lip with the joining of the injection on ramp, because of the blockage of the jet to incoming flow. As the mass flow of jet exceeds the threshold value of 5% of inlet mass flow, and the duration time of injection is less than 15 ms, needing at least 0.0014 kg gas for injection, the unstart flow of inlet will restart. And a high-frequency oscillation flow with 135 Hz arises when the mass flow of jet is less lightly than the threshold value. The duration time for restart and total gas mass reduce with the increase of mass flow of jet because of the faster flow response when the mass flow of jet exceeds the threshold value.
| Original language | English |
|---|---|
| Pages (from-to) | 2181-2187 |
| Number of pages | 7 |
| Journal | Hangkong Dongli Xuebao/Journal of Aerospace Power |
| Volume | 26 |
| Issue number | 10 |
| State | Published - Oct 2011 |
| Externally published | Yes |
Keywords
- Mixed-compression supersonic inlet
- Oscillation flow
- Restart performance
- Single square pulse injection
- Unsteady numerical simulation