【摘要】：從真實流體所具粘滯耗散特性出發(fā),以數(shù)學(xué)解析法嚴(yán)謹(jǐn)?shù)卣撟C了淹沒射流因沿程能量通量漸減,加以其動量通量沿程守恒,故其質(zhì)量通量必然沿程遞增,從而衍生出射流卷吸及附壁效應(yīng),于是,在專門設(shè)計的腔體中就會發(fā)生流控振蕩現(xiàn)象.發(fā)生流控振蕩的腔體的兩個出口會交替地輸出兩股非共面動量通量射束并在其后形成順流螺旋渦,在繞水平軸旋渦的流場中,重于水的沙粒將獲得附加的懸浮功增量,而輕于水的氣泡或藻菌團(tuán)的上浮行動將受阻礙.前者會加大河流的挾沙能力,后者的影響將導(dǎo)致水藻所賴以滋長的光合能量銳減而枯萎,從而改善水質(zhì).
[Abstract]:Based on the viscous and dissipative characteristics of real fluid, the mathematical analytical method is used to prove that the submerged jet must increase its mass flux along the path because the energy flux of the submerged jet decreases gradually and the momentum flux is conserved along the path. Thus, the jet entrainment and wall attachment effect are derived, so the fluid-controlled oscillation will occur in the specially designed cavity. The two outlets of the cavity in which the fluid-controlled oscillation occurs will alternately output two non-coplanar momentum flux beams and then form a downstream spiral vortex. In the flow field around the horizontal axis vortex, the sand particles that are heavier than water will obtain additional suspended power increments. The floating action of bubbles or algae colonies lighter than water will be hindered. The former will increase the sediment carrying capacity of the river, and the latter will cause the photosynthetic energy on which algae grow to decline and wither, thus improving the water quality.
【作者單位】： 北京建筑大學(xué)土木與交通工程學(xué)院;北京建筑大學(xué)環(huán)境與能源工程學(xué)院;
【基金】：北京市自然科學(xué)基金(No.3952004)~~
【分類號】：X143

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1 孫厚鈞;高軍;;用振蕩射流抑制藍(lán)藻滋長防止泥沙淤積[J];武漢大學(xué)學(xué)報(工學(xué)版);2009年06期

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