摘要
鲨鱼皮的盾鳞形沟槽形状是鲨鱼保持高速前行的关键。将鲨鱼皮表面沟槽结构应用到高速列车领域,采用格子Boltzmann方法模拟了盾鳞形沟槽表面对流动阻力的影响,根据模拟结果计算阻力损失系数,并与光滑表面阻力损失系数进行对比分析,得到不同雷诺数下的沟槽表面减阻能力。根据盾鳞形沟槽表面内流线图分析了沟槽的减阻机理。
The placoid groove surface shape of shark skin is the key for the high speed movement of sharks.When applied to the high-speed trains,the lattice Boltzmann method will simulate the placoid grooved surface effects on flow resistance,calculate the resistance loss coefficient.Compare with the pressure loss coefficient of smooth surface,the drag reduction abilities of grooved surface under different Reynolds numbers are obtained.In this paper,the drag reduction mechanism is analyzed based on the grooved surface streamlined diagram.
出处
《城市轨道交通研究》
北大核心
2015年第1期28-31,共4页
Urban Mass Transit
基金
国家自然科学基金项目(51206179)
