Abstract
A cold flow experimental system was built to study the influence of mean flow velocities on pressure oscillation. By putting trace particles into the flow field, its vortex movement in tester was obtained with continuous laser sheet displaying of flow and high speed digital camera. The results show that vortex shedding frequency rises with the increasing of mean flow velocity.By comparing the pressure oscillation data and the high speed visualization image sequence, it can be concluded that when the vortex shedding frequency is close to the frequency of one of resonant acoustic modes of the experimental facility, pressure oscillation occurs. The closer the two frequencies are, the higher the amplitude is.
| Original language | English |
|---|---|
| Pages (from-to) | 426-430 |
| Number of pages | 5 |
| Journal | Guti Huojian Jishu/Journal of Solid Rocket Technology |
| Volume | 34 |
| Issue number | 4 |
| State | Published - Aug 2011 |
Keywords
- Acoustic-vortex coupling
- Cold flow experiment
- Obstacle vortex-shedding(OVS)