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Numerical visualization of vortex flow behavior in square jets in cross-flow

Maidi, Mohamad; Yao, Y.

Authors

Mohamad Maidi

Yufeng Yao Yufeng.Yao@uwe.ac.uk
Professor in Aerospace Engineering



Abstract

Direct numerical simulations have been performed in this study to visualize the flow behavior of single and multiple square jets issuing normally into a cross-flow. Three configurations are considered, a single jet located in the centre of the domain, twin jets in side-by-side (SBS) arrangement in the spanwise direction and triple jets in tandem arrangement with twin jets at the front and a third jet in downstream along the centre line. Simulation uses a jet to cross-flow velocity ratio of 2.5 and the Reynolds number 225, based on the free-stream quantities and the jet width. While the vortical structures predicted from single jet case were in good qualitatively agreement with the findings of other researchers, our results show that the process of merging between two counter-rotating vortex pairs (CRVP) in twin jets configurations is strongly dependent on the jet-to-jet edge distance. Further downstream in the far-field, results from the SBS twin jets show a most dominating larger CRVP accompanied with a smaller inner vortex pair. The observations are in good qualitative agreement with the experimental findings in the literature. The resulting flow structures of triple jets in tandem configuration have revealed, for the first time, more complicated flow interactions between individual jets and cross-flow, providing further insights of complex flow physics and its potential engineering applications. © 2008 The Visualization Society of Japan.

Citation

Maidi, M., & Yao, Y. (2008). Numerical visualization of vortex flow behavior in square jets in cross-flow. Journal of Visualization, 11(4), 319-327. https://doi.org/10.1007/BF03182200

Journal Article Type Article
Publication Date Jan 1, 2008
Journal Journal of Visualization
Print ISSN 1343-8875
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
Volume 11
Issue 4
Pages 319-327
DOI https://doi.org/10.1007/BF03182200
Keywords numerical visualization, jets in cross-flow, vortex flow
Public URL https://uwe-repository.worktribe.com/output/1008541
Publisher URL http://dx.doi.org/10.1007/BF03182200