Abstract
Based on the CFD numerical simulation, the flow mechanism of the ultra-compact serpentine convergent-divergent nozzle was studied. According to the phenomenon of flow separation in the flow field, the flow control method of suction technology was adopted and the effect caused by the changing of the location of the installation, the angle of suction jet and the pressure ratio of suction were analyzed in detail. The computational results showed that the local acceleration zones existed near the upper wall of the first turning and the down wall of the second turning. There is a pair of vortex in the cross section of the throat, and the flow separation occurs after the first turning which lead to a separation zone. The separation zone basically disappeared when sucked before the separation point, the total pressure recovery coefficient and thrust coefficient increased about 1.08% and 3.71% respectively in comparison with the prototype when sucking before the separation point with sucking ratio of 3 and sucking angle of 45◦, leading to the best control effect.
| Original language | English |
|---|---|
| Pages (from-to) | 1718-1724 |
| Number of pages | 7 |
| Journal | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics |
| Volume | 39 |
| Issue number | 8 |
| State | Published - 1 Aug 2018 |
Keywords
- Flow mechanism
- Flow separation
- Serpentine nozzle
- Sucking control