所属单位：航空学院
发表刊物：Proc. Int. Bhurban Conf. Appl. Sci. Technol., IBCAST
摘要：Associating with a grooved cylinder, our research group designs a new type of low-wind-pressure conductor. Based on the OpenFOAM v5.0 platform, five different types of three-dimensional low-wind-pressure conductors and the standard conductor are numerically simulated by using the Large Eddy Simulation with Wall-adapting local eddy-viscosity (WALE) SGS model at Re=1.4×105. Firstly, the flow around a circular cylinder is calculated to prove the reliability of computation in this paper. The calculation results are then analyzed for the comparison of the drag coefficient, flow field characteristics and surface pressure coefficient of the low-wind-pressure conductors and the standard conductor, respectively. The drag coefficient agrees well with the experimental value. The reason for drag reduction in low-wind-pressure conductors is proved to be the generation of small-scale vortices in the surface grooves, which delay flow separation and reduce pressure drag. By comparing the average drag coefficient of the five types of low-wind-pressure conductors, the rougher surface gives rise to a worse drag reduction effect. © 2019 IEEE.
是否译文：否
发表时间：2019-03-13
合写作者：Chao, Ma,Mingnian, Wu,Yaojun, Miao
通讯作者：张军
发表时间：2019-03-13