横肋粗糙元地表的风场阻力特征研究
发布时间：2018-12-11 08:05
【摘要】：使用雷诺应力模型(RSM)模拟横肋粗糙元地表的风场,将粗糙元横截面的高宽比h/b、粗糙元间距宽度比w/b以及间距高度比w/h作为粗糙表面的特征参数,利用数值方法定量研究了粗糙表面阻力随粗糙元密度的变化规律以及粗糙元横截面尺寸改变对阻力的影响。研究结果表明:粗糙元横截面尺寸改变不影响粗糙表面阻力随粗糙元分布密度的变化规律,粗糙元的间距高度比w/h是横肋粗糙表面的关键特征参数,且粗糙表面的平均总阻力在w/h=7时取得最大值。
[Abstract]:The Reynolds stress model (RSM) is used to simulate the wind field on the surface of the rough element with transverse ribs. The aspect / width ratio (h / b) of the cross section of the rough element, the ratio w / b of the distance between the rough elements, and the ratio of the distance to height (w / h) are taken as the characteristic parameters of the rough surface. The variation of rough surface resistance with the density of rough element and the influence of cross section size of rough element on the resistance were studied quantitatively by numerical method. The results show that the change of cross section size of rough elements has no effect on the variation of surface resistance with the distribution density of rough elements. The distance between rough elements and the height ratio of rough elements w / h is the key characteristic parameter of rough surface of transverse ribs. And the average total resistance of rough surface reaches the maximum at w / h = 7.
【作者单位】： 兰州大学西部环境与灾害力学教育部重点实验室土木工程与力学学院;
【基金】：国家自然科学基金委创新研究群体(11421062) 国家自然科学基金重大计划项目(91325203);国家自然科学基金项目(11472121)
【分类号】：O357.5
，
本文编号：2372195
[Abstract]:The Reynolds stress model (RSM) is used to simulate the wind field on the surface of the rough element with transverse ribs. The aspect / width ratio (h / b) of the cross section of the rough element, the ratio w / b of the distance between the rough elements, and the ratio of the distance to height (w / h) are taken as the characteristic parameters of the rough surface. The variation of rough surface resistance with the density of rough element and the influence of cross section size of rough element on the resistance were studied quantitatively by numerical method. The results show that the change of cross section size of rough elements has no effect on the variation of surface resistance with the distribution density of rough elements. The distance between rough elements and the height ratio of rough elements w / h is the key characteristic parameter of rough surface of transverse ribs. And the average total resistance of rough surface reaches the maximum at w / h = 7.
【作者单位】： 兰州大学西部环境与灾害力学教育部重点实验室土木工程与力学学院;
【基金】：国家自然科学基金委创新研究群体(11421062) 国家自然科学基金重大计划项目(91325203);国家自然科学基金项目(11472121)
【分类号】：O357.5
，
本文编号：2372195
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