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Effects of adverse pressure gradient on Reynolds stresses inturbulent boundary layers

Effects of adverse pressure gradient on Reynolds stresses inturbulent boundary layers
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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. The effects of adverse pressure gradient （APG） on Reynolds stresses in turbulent boundary lay ers （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 develop- ment 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.
作者 LUO Xiao-tian ZHANG Ce MA Wei TENG Jin-fang LUO Xiao-tian ZHANG Ce MA Wei TENG Jin-fang(School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai 200240, Chin)
机构地区 School of Aeronautics and Astronautics
出处 《航空动力学报》 EI CAS CSCD 北大核心 2017年第2期463-469,共7页 Journal of Aerospace Power
基金 Natural Science Foundation of Shanghai(15ZR1422500) Initiative Projects of Shanghai Jiao Tong University Young Teachers(AF4130024)
关键词 turbulent boundary layer adverse pressure gradient zero pressure gradient Reynolds stresses flat plate turbulent boundary layer adverse pressure gradient zero pressure gradient Reynolds stresses flat plate
分类号 V231.3 [航空宇航科学与技术—航空宇航推进理论与工程] O357.52 [理学—流体力学]
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航空动力学报
2017年 第2期

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