Experimental investigation on the mean flow field and impact force of a semi-confined round impinging jet.
- Resource Type
- Article
- Authors
- X K Wang; G-P Niu; S-Q Yuan; J X Zheng; S K Tan
- Source
- Fluid Dynamics Research. Apr2015, Vol. 47 Issue 2, p1-1. 1p.
- Subject
- *PARTICLE image velocimetry
*REYNOLDS number
*HEAT transfer
*JETS (Fluid dynamics)
*FLOW visualization
- Language
- ISSN
- 0169-5983
Based on combined particle image velocity (PIV) and force measurements, the flow structures and the impact force of a fully-developed turbulent round jet impinged normally onto a flat plate were investigated. The Reynolds number based on the exit bulk velocity and the jet diameter was varied from Re = 9800 to 46 550, and the distance between the jet exit and the plate was varied from to 30. The mean velocity field and the mean impact force coefficients on the impingement plate were found to be highly dependent on but relatively insensitive to Re within the range examined. Depending on the value of the development of the mean velocity along the centerline can be classified into two, three or four distinct zones. Each zone can be approximated by a quasi-linear fit with a distinct decay rate (slope). [ABSTRACT FROM AUTHOR]