Smoke-wire flow visualization is used to investigate the behavior of a round jet issuing from a straight tube and impinging on a convex surface. Video analysis of the impinging jet shows the initiation and growth of ring vortices in the jet shear layer and their interaction with the cylindrical surfaces. Effects of relative curvature, nozzle-to-surface distance, and Reynolds number on vortex initiation, vortex separation from the surface and vortex breakup are described. Examples of vortex merging are discussed.
Bibliographical noteFunding Information:
This material is based upon work completed while A.S. Fleischer was supported under a National Science Foundation Graduate Research Fellowship. Support by the Engineering Research Program of the Office of Basic Energy Sciences at the Department of Energy is gratefully acknowledged.
- Curved surface
- Flow visualization
- Jet dynamics
- Jet impingement
- Jet impingement cooling