空气动力学学报2016，Vol.34Issue(4)：517-523,7.DOI:10.7638/kqdlxxb-2015.0025
横肋粗糙元地表的风场阻力特征研究
Research on wind resistance characteristics of transverse rod-roughened surface
摘要
Abstract
The wind field above transverse rod-roughened surface is investigated using the Reynolds stress model (RSM).The RSM abandons Boussinesq hypothesis that the Reynolds stress has linear relationship with mean velocity gradient.The RSM is more realistic because the convection and diffusion effects of Reynolds stress are considered.The pitch width ratio w/b 、as-pect ratio h/b and pitch height ratio w/h are regarded as the main characteristics parameters of transverse rod-roughened surface to study the effect of roughness elements distribution density and cross section size on rough surface resistance.Numerical results indicate that the mean fric-tional resistance first decreases then rises with the increasing of w/b ,while the variation of mean form resistance and mean skin resistance show contrary trends and the variation of h/b has noth-ing to do with these trends.The w/b corresponding to the maximum mean skin resistance increa-ses with h/b ,and the w/h corresponding to that keeps around 7.It suggests that the pitch height ratio is the key parameter of transverse rod-roughened surface and the maximum skin resistance occurs at w/h =7.关键词
横肋粗糙元/摩擦阻力/形状阻力/平均总阻力Key words
transverse rod roughness/frictional resistance/form resistance/skin resistance分类
数理科学引用本文复制引用
李冰,江岸,武建军..横肋粗糙元地表的风场阻力特征研究[J].空气动力学学报,2016,34(4):517-523,7.基金项目
国家自然科学基金委创新研究群体(11421062) （11421062）
国家自然科学基金重大计划项目(91325203) （91325203）
国家自然科学基金项目(11472121) （11472121）
