Abstract
To indicate the characteristics of vorticity distribution in a cavitating flow field, cavitating flows around a hydronautics foil are measured by means of a digital particle image velocimetry (DPIV) system and a high-speed video camera. The results showed that changes of vorticity distributions in the flowing fields depend on the development of cavitation structures. Most vortices can be seen near the shear-layer area in all cases, and behave as vorticity bands. With decrease of cavitation numbers, the vorticity value lowers since there is no large grad in its velocity in the cavitation area, and the inceptive position of the lower vortex band moves downstream. At the cloud-cavitation stage, the vorticity bands become more dispersed and behave as many vorticity group.
| Original language | English |
|---|---|
| Pages (from-to) | 192-196 |
| Number of pages | 5 |
| Journal | Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology |
| Volume | 28 |
| Issue number | 3 |
| Publication status | Published - Mar 2008 |
Keywords
- Cavitating flows
- Digital particle image velocimetry (DPIV)
- Hydrofoil
- Vorticity distribution