Large eddy simulation of flow characteristics in an unconfined slot impinging jet with various nozzle-to-plate distances |
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Authors: | Hongyun So Hyun Gi Yoon Myung Kyoon Chung |
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Affiliation: | (1) Mechanical Engineering Department, Benha High Institute of Technology, Benha, 13512, Egypt |
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Abstract: | To study the detailed flow structure of the unconfined plane impinging jet, a 3-dimensional flow analysis is carried out focused
on the flow mechanism with the non-dimensional distance, L/d, as flow parameter by using the LES turbulent technique. The
symbols d and L represent the nozzle width and the nozzle-to-plate distance, respectively. Then, the flow structures along
both the stream-wise and spanwise direction are investigated. For these purposes, the plane impinging jet with Reynolds number
of 11,000 is analyzed. The nozzle width was fixed at 1.5mm, but the nozzle-to-plate distance was varied between 4mm and 24mm.
As a result, the plane impinging jet shows different flow patterns with L/d. In conclusion, the plane impinging jet is classified
into three types with the non-dimensional variable, L/d. L/d≤4: Stable impinging jet, 4<L/d<11: periodically-stable impinging
jet and L/d≥11: Unstable impinging jet. |
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Keywords: | |
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