哈尔滨工程大学学报2024，Vol.45Issue(6)：1152-1161,10.DOI:10.11990/jheu.202202003
水下平板通气减阻特性研究
Drag reduction characteristics of an underwater air lubrication flat plate
摘要
Abstract
To study the effect of ventilation jets on the resistance characteristics of underwater flat plates,the mix-ture multiphase flow model and Realizable k-ε turbulence model investigated the flow feather of a three-dimensional underwater flat vented jet,obtaining the structure and drag reduction characteristics of the gas-liquid flow field on the underwater flat surface.Numerical results showed that after the gas was injected,it was affected by the incom-ing flow and developed downstream closely along the wall.When the gas stably covered the plate wall,the resist-ance coefficient of the plate was 16.73%lower than the unventilated case.Because of the injection of gas on the wall boundary layer,the wall velocity gradient was increased,and the wall fluid viscosity coefficient was reduced;in the gas film coverage area(αl>80%),because the decrease in the fluid viscosity coefficient was much greater than the increase in the velocity gradient,the fluid viscosity coefficient played a decisive role in the drag reduction rate in the core region of the gas film;for the wall far from the core area of the gas film,the contribution of the tan-gential velocity gradient to the friction resistance coefficient was enhanced.关键词
通气射流/平板/减阻率/粘性系数/速度梯度/核心区/数值模拟/摩擦系数Key words
ventilation jet/flat plate/drag reduction rate/viscosity coefficient/velocity gradient/core area/nu-merical simulation/friction coefficient分类
能源科技引用本文复制引用
余恒安,张焕好,陈志华,郑纯,彭江舟..水下平板通气减阻特性研究[J].哈尔滨工程大学学报,2024,45(6):1152-1161,10.基金项目
瞬态物理重点实验室基金项目(614260403041802). （614260403041802）
