Abstract
To pursue the proper design criteria for gas-gas injector, the flow visualization technology with particle image velocimetry(PIV) system was adopted to investigate the mixing mechanism. The coaxial shear and swirl configurations were selected. The results show that the momentum ratio of oxygen to hydrogen prevails in the mixing process of coaxial shear injector, while the swirl numbers dominate the mixing part of coaxial swirl injector. Good mixing was gained at high momentum ratio and high swirl numbers. For the designer, the combination of high annular pressure drop and low center pressure drop is recommended for the coaxial shear injector, and the combination of low annular pressure drop and proper recess length of center post recommended for swirl injector.
| Original language | English |
|---|---|
| Pages (from-to) | 692-697 |
| Number of pages | 6 |
| Journal | Hangkong Dongli Xuebao/Journal of Aerospace Power |
| Volume | 26 |
| Issue number | 3 |
| State | Published - Mar 2011 |
Keywords
- Coaxial shear gas-gas injector
- Coaxial swirl gas-gas injector
- Mixing flowfield
- Momentum ratio
- Particle image velocimetry
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