Abstract
In order to reveal the relationship between the melting of pulse separation device (PSD) and the pressure oscillation, several melting moments were selected for research. Large eddy simulation (LES) was carried out for the numerical simulation of II pulse flow field, and the pressure-time curve and fast Fourier transformation (FFT) results were obtained successfully. The analysis results show that the additional disturbance in the flow field generated by opening PSD when the II pulse is working, and the acceleration of interstage narrow channel, are the main factors to obstacle vortex shedding caused by boundary layer separation. In the early ignition, the double pulse motor (DPM)is prone to slight pressure oscillation. With the PSD melting, the whole flow field becomes more and more stabilized.
| Original language | English |
|---|---|
| Pages (from-to) | 2553-2560 |
| Number of pages | 8 |
| Journal | Hangkong Dongli Xuebao/Journal of Aerospace Power |
| Volume | 30 |
| Issue number | 10 |
| DOIs | |
| State | Published - 1 Oct 2015 |
Keywords
- Double pulse motor
- Large eddy simulation
- Pressure oscillation
- Pulse separation device
- Sudden closing and sudden expansion
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