Numerical study of a turbulent impinging jet for different jet-to-plate distances using two-equation turbulence models

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• 作者：Julia Wienand ; ^{julia.wienand@itlr.uni-stuttgart.de} ; Andris Riedelsheimer ; Bernhard Weigand
• 关键词：Impinging jet ; RANS turbulence model ; Kato&ndash ; Launder ; Heat transfer ; Near-wall treatment
• 刊名：European Journal of Mechanics - B/Fluids
• 出版年：2017
• 出版时间：January-February 2017
• 年：2017
• 卷：61
• 期：part_P2
• 页码：210-217
• 全文大小：1208 K
• 卷排序：61

文摘

Numerical results of a turbulent impinging jet on a flat plate are compared with experimental reference data from ERCOFTAC. Four different jet-to-plate distances from H/D=2H/D=2 to 1414 have been considered at a jet Reynolds number of 2323,000000. Local flow and heat transfer characteristics are analyzed using the SST turbulence model by Menter and an additional turbulence production limiter by Kato and Launder. For the smaller jet-to-plate distances of H/D=2H/D=2 and 66, the Kato–Launder turbulence production limiter reproduces the heat transfer in the stagnation region very well. At the higher values H/D=10H/D=10 and 1414, the modification underpredicts the reference data.The near-wall grid resolution at the target plate has been varied for a jet-to-plate distance of H/D=6H/D=6. The results show the influence of the dimensionless distance of the first node near the wall on flow and heat transfer characteristics. A comparison of a hybrid and a block-structured grid assesses the influence on the mesh topology.