首页 | 本学科首页   官方微博 | 高级检索  
     

沟槽表面边界层湍动能分布规律
引用本文:胡海豹,宋保维,刘占一,黄明明,黄桥高. 沟槽表面边界层湍动能分布规律[J]. 航空学报, 2009, 30(10): 1823-1828
作者姓名:胡海豹  宋保维  刘占一  黄明明  黄桥高
作者单位:西北工业大学航海学院,陕西西安,710072;西北工业大学航海学院,陕西西安,710072;西北工业大学航海学院,陕西西安,710072;西北工业大学航海学院,陕西西安,710072;西北工业大学航海学院,陕西西安,710072
基金项目:国家自然科学基金,全国优秀博士学位论文基金,西北工业大学科技创新基金 
摘    要: 通过对不同风速下不同尺寸V型沟槽表面及光洁平板表面边界层内湍动能的测试,对比分析了沟槽表面边界层湍动能的分布规律。试验在一小型专用风洞中开展,流场测试中使用恒温式IFA300智能型流动分析仪,测试模型则采用有机玻璃材质的矩形平板结构;而在沟槽表面理论零点及壁面摩擦速度的计算中,采用基于湍流边界层Spalding壁面律公式同时计算壁面理论零点和壁面摩擦速度的改进方法。最终研究结果表明,沟槽结构主要影响边界层流场的近壁区,沟槽的存在提高了边界层中黏性底层内湍流脉动所具有的动能,有效降低了边界层中过渡区内的湍动能,最大相对降幅超过10%,较好地验证了基于“二次涡”的沟槽表面减阻理论。

关 键 词:沟槽表面  边界层  湍动能  风洞  二次涡

Research on Characteristics of Turbulence Kinetic Energy in Boundary Layer over Riblet Surfaces
Hu Haibao,Song Baowei,Liu Zhanyi,Huang Mingming,Huang Qiaogao. Research on Characteristics of Turbulence Kinetic Energy in Boundary Layer over Riblet Surfaces[J]. Acta Aeronautica et Astronautica Sinica, 2009, 30(10): 1823-1828
Authors:Hu Haibao  Song Baowei  Liu Zhanyi  Huang Mingming  Huang Qiaogao
Affiliation:College of Marine Engineering, Northwestern Polytechnical University
Abstract:By performing a number of experiments on the turbulence kinetic energy of smooth plate surfaces and different V-riblet surfaces in various sizes at different wind velocities, the distributing rule of the turbulence kinetic energy over the riblet surfaces in the boundary layer is acquired. The experiments are carried out in a self-made special small-size wind tunnel. The flow field is tested with a TSI-IFA300 hot wire anemometer. The test models, which are made of organic glass, are so placed as to make sure the riblets are streamwise. In the calculation of the virtual origin and wall friction velocity of the riblet surfaces, a modified method is adopted, which can obtain virtual origin and wall friction velocity together by the least-squares fitting method based on the Spalding formula in the turbulent boundary layer. Ultimate results show that the existence of the riblets mainly change the near-wall flow field,and the turbulence kinetic energy in the viscous sublayer of the riblet surface boundary layer is increased, while the turbulence kinetic energy in the buffer zone of the riblet surface boundary layer is reduced dramatically,with the greatest relative reduction quantity of above 10%. This indirectly proves that the drag reduction mechanism of riblet surfaces based on the “secondary vortex” theory is reasonable.
Keywords:riblet surface  boundary layer  turbulence kinetic energy  wind tunnel  secondary vortex
本文献已被 万方数据 等数据库收录!
点击此处可从《航空学报》浏览原始摘要信息
点击此处可从《航空学报》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号