沟槽面湍流边界层减阻特性研究  

Drag-Reduction Characteristics of Turbulent Boundary Layer Flow over Riblets Surfaces

作　　者：王晋军[1] 兰世隆[1] 苗福友[1] 

机构地区：[1]北京航空航天大学

出　　处：《中国造船》2001年第4期1-5,共5页Shipbuilding of China

摘　　要：在光滑平板中分别嵌入一段不同尺寸的沟槽板 ,通过分析沟槽板前后流场速度分布、紊动特性等的变化 ,得出 :沟槽板上粘性底层厚度比沟槽板上、下游光滑平板处增大 ,沟槽板上流速分布对数公式中的 C值也比上、下游光滑平板的 C值大 ,说明沟槽板上局部摩擦阻力较小 。The riblet plates with different dimension are inserted in the smooth plate respectively. Based on the comparison between the distributions of velocity and turbulent intensity over the smooth plates down stream and up stream of the riblet plate and those over the riblet plate, it is found that both the thickness of viscous sublayer and the integral constant C in log law have larger values for riblet surfaces, and this implies that the local friction of the flow is reduced. Moreover, the local drag reduction characteristics is discussed in detail.

关 键 词：减阻特性 沟槽板 湍流边界层 湍流强度 阻力特性 

分 类 号：O357.54[理学—流体力学] O357[理学—力学]