Skin friction reduction characteristics of variable ovoid non-smooth surfaces

作     者：Xiao-wen SONG Peng-zhe LIN Rui LIU Pei ZHOU 

作者机构：State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang University Hangzhou 310027 China 

基　　金：Project supported by the National Natural Science Foundation of China (No. 51375439) 

出 版 物：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 (浙江大学学报（英文版）A辑（应用物理与工程）)

年 卷 期：2017年第18卷第1期

页      码：59-66页

摘      要：The use of bionic non-smooth surfaces is a popular approach for saving energy because of their drag reduction property. Conventional non-smooth structures include riblets and dimples. Inspired by sand dunes, a novel variable ovoid non-smooth structure is proposed in this study. The body of the variable ovoid dimple was designed based on three size parameters, the radius, semimajor, and depth, and a 3D model was created based on UG software. The constructed variable dimples were placed in a rectangular array on the bottom of a square tube model. Following ANSYS meshing, the grid model was imported into FLUENT, where the flow characteristics were calculated. Results of skin friction reduction were achieved and the effect of the design parameters on different variable ovoid dimples was obtained by orthogonal testing. Various aspects of the skin friction reduction mechanism were discussed including the distribution of velocity vectors, variation in boundary layer thickness, and pressure distribution.

主 题 词：Variable ovoid dimple Non-smooth surface Numerical simulation Skin friction reduction 

学科分类：0810[工学-土木类] 08[工学] 082304[082304] 080203[080203] 080204[080204] 0805[工学-能源动力学] 0802[工学-机械学] 0812[工学-测绘类] 0823[工学-农业工程类] 

核心收录：

D　O　I：10.1631/jzus.A1500324

馆 藏 号：203210440...