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水下条纹沟槽表面近壁区流场的数值分析
引用本文:胡海豹,潘光,宋保维,毛昭勇.水下条纹沟槽表面近壁区流场的数值分析[J].上海力学,2004,25(1):96-100.
作者姓名:胡海豹  潘光  宋保维  毛昭勇
作者单位:西北工业大学航海工程学院,西北工业大学航海工程学院,西北工业大学航海工程学院,西北工业大学航海工程学院 西安 710072,西安 710072,西安 710072,西安 710072
摘    要:近年来对于水下条纹沟槽表面减阻的研究多集中在试验方面,理论分析和数值计算进行的却不多。而由于受实验条件的限制,条纹沟槽表面减阻的微观机理也一直没有搞清楚。本文正是通过理论方面的分析和计算来进一步揭示条纹沟槽表面的微观流场。首先基于“第二涡群”论对条纹沟槽表面流场的减阻特性进行了理论分析,阐述了其减阻机理;在此基础上采用B.L两层代数模型,建立了条纹沟槽表面水下流场的简化数学模型;并利用有限差分法对近壁区流场进行了数值计算.首次通过理论计算的方法获得了条纹沟槽表面水下微观流场的速度分布;为以后进一步从理论和实验上研究条纹沟槽减阻特性奠定了重要的基础。

关 键 词:第二涡群  水下条纹沟槽  表面减阻  近壁区流场  数值分析  减阻机理  液体力学
文章编号:0254-0053(2004)01-0096-05

Numerical Analysis of Near-wall Fluid Field on Grooved Surface under Water
HU Hai-bao,PAN Guang,SONG Bao-wei,MAO Zhao-yong.Numerical Analysis of Near-wall Fluid Field on Grooved Surface under Water[J].Chinese Quarterly Mechanics,2004,25(1):96-100.
Authors:HU Hai-bao  PAN Guang  SONG Bao-wei  MAO Zhao-yong
Abstract:The researches of drag reduction by grooved surface in water are mostly concentrated in experimentations recently, and researches in theory and numerical calculation are lacked. The microcosmic mechanism about the drag reduction by grooved surface is not very clear since of the confines in experimentations. Based on the "Second vortex" theory, the characteristic of drag reduction about fluid field on the grooved surface was analyzed and the mathematical model was established. Then the calculation for near-wall fluid field with numerical method was accomplished. At last, the distributions of velocity in near-wall fluid field on the grooved surface was gotten, which was the important base for the further research of drag reduction by grooved surface in theory and experimentation.
Keywords:second-vortex  grooved surface  near-wall  fluid field
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