翼沉浮运动推力来源的数值研究  

Numerical study of thrust generation mechanism of heaving wings

作　　者：文敏华[1] 胡文蓉[2] 刘洪[1] 

机构地区：[1]上海交通大学航空航天学院,上海200240 [2]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《水动力学研究与进展（A辑）》2012年第2期154-161,共8页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金项目(11072152);海洋工程国家重点实验室自主研究课题资助~~

摘　　要：用数值模拟研究沉浮运动机翼的推力来源,并分析了雷诺数、沉浮幅度、翼型厚度以及外形等因素的影响。结果表明:非定常情况下的流场和流体动力与定常情况下完全不同;不同条件下粘性力和压差力对推力的贡献也很不一样;流体动力与流场涡结构密切相关,在某些情况下粘性力有可能成为推力的主要来源。In this paper, we investigate the thrust generation mechanism of heaving wings using numerical method. The effects of Reynolds number, heaving amplitude, thickness, shape and three-dimensional conditions are analyzed. The results show that the fluid field in unsteady flow is very different from that of steady condition. The contribution to thrust generation from viscous force and pressure difference force varies in different conditions. And the fluid dynamics is closely associated with the vortex structures. In addition, viscous force can produce thrust in certain particular conditions.

关 键 词：沉浮翼 推力来源 不可压缩N-S方程 

分 类 号：O35[理学—流体力学]