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Subject Keyword Abstract Author
 
 
Large eddy simulation of flow characteristics in an unconfined slot impinging jet with various nozzle-to-plate distances

Hongyun So, Hyun Gi Yoon*, Myung Kyoon Chung
The Journal of Mechanical Science and Technology, vol. 25, no. 3, pp.721-729, 2011

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

Keyword : Buckling of the jet; LES (large eddy simulation); Slot impinging jet; Stability; Vortex pair

 
 
 
 
 
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