【摘要】：使用雷諾應(yīng)力模型(RSM)模擬橫肋粗糙元地表的風(fēng)場(chǎng),將粗糙元橫截面的高寬比h/b、粗糙元間距寬度比w/b以及間距高度比w/h作為粗糙表面的特征參數(shù),利用數(shù)值方法定量研究了粗糙表面阻力隨粗糙元密度的變化規(guī)律以及粗糙元橫截面尺寸改變對(duì)阻力的影響。研究結(jié)果表明:粗糙元橫截面尺寸改變不影響粗糙表面阻力隨粗糙元分布密度的變化規(guī)律,粗糙元的間距高度比w/h是橫肋粗糙表面的關(guān)鍵特征參數(shù),且粗糙表面的平均總阻力在w/h=7時(shí)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.
【作者單位】： 蘭州大學(xué)西部環(huán)境與災(zāi)害力學(xué)教育部重點(diǎn)實(shí)驗(yàn)室土木工程與力學(xué)學(xué)院;
【基金】：國家自然科學(xué)基金委創(chuàng)新研究群體(11421062) 國家自然科學(xué)基金重大計(jì)劃項(xiàng)目(91325203);國家自然科學(xué)基金項(xiàng)目(11472121)
【分類號(hào)】：O357.5
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本文編號(hào)：2372195