| Effects of adverse pressure gradient on Reynolds stresses inturbulent boundary layers |
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| 作者姓名： | LUO Xiao tian ZHANG Ce MA Wei TENG Jin fang |
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| 作者单位： | School of Aeronautics and Astronautics,Shanghai Jiao Tong University,Shanghai 200240,China |
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| 基金项目： | Natural Science Foundation of Shanghai (15ZR1422500); Initiative Projects of Shanghai Jiao Tong University Young Teachers (AF4130024) |
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| 摘 要： | The effects of adverse pressure gradient (APG) on Reynolds stresses in turbulent boundary layers (TBLs) with APG were analyzed. The difficulty of this work was attributable to the Reynolds stresses in TBLs with APG under two combined effects, i.e.: effect of upstream flow and effect of APG. The effect of upstream flow is an inherent effect no matter pressure gradient exists or not. The individual effect was analyzed from absolute developments of Reynolds stresses in TBLs with zero pressure gradient (ZPG) firstly. Effect of APG was then analyzed from absolute developments of Reynolds stresses in TBLs with APG. Result showed that, for absolute development of mean streamwise Reynolds stresses, APG accelerated its development in TBL with ZPG; for absolute development of mean normal or shear Reynolds stresses, APG increased their magnitude in the outer part, and decreased their extent of large value region.
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| 关 键 词： | turbulent boundary layer adverse pressure gradient zero pressure gradient Reynolds stresses flat plate |
| 收稿时间： | 2015/5/18 0:00:00 |
Effects of adverse pressure gradient on Reynolds stresses inturbulent boundary layers |
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| LUO Xiao tian,ZHANG Ce,MA Wei,TENG Jin fang.Effects of adverse pressure gradient on Reynolds stresses inturbulent boundary layers[J].Journal of Aerospace Power,2017,32(2):462-469. |
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| Authors: | LUO Xiao-tian ZHANG Ce MA Wei TENG Jin-fang |
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| Institution: | School of Aeronautics and Astronautics,Shanghai Jiao Tong University,Shanghai 200240,China |
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| Abstract: | The effects of adverse pressure gradient (APG) on Reynolds stresses in turbulent boundary layers (TBLs) with APG were analyzed. The difficulty of this work was attributable to the Reynolds stresses in TBLs with APG under two combined effects, i.e.: effect of upstream flow and effect of APG. The effect of upstream flow is an inherent effect no matter pressure gradient exists or not. The individual effect was analyzed from absolute developments of Reynolds stresses in TBLs with zero pressure gradient (ZPG) firstly. Effect of APG was then analyzed from absolute developments of Reynolds stresses in TBLs with APG. Result showed that, for absolute development of mean streamwise Reynolds stresses, APG accelerated its development in TBL with ZPG; for absolute development of mean normal or shear Reynolds stresses, APG increased their magnitude in the outer part, and decreased their extent of large value region. |
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| Keywords: | turbulent boundary layer adverse pressure gradient zero pressure gradient Reynolds stresses flat plate |
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