【摘要】：針對旋轉(zhuǎn)圓筒容器內(nèi)的兩種分層流體,應(yīng)用平面激光誘導(dǎo)熒光與高速攝影技術(shù)對互溶與不互溶液體進(jìn)行了實驗研究.結(jié)果表明,上下層液體密度梯度與黏度梯度方向是產(chǎn)生界面不穩(wěn)定的關(guān)鍵因素.當(dāng)二者的梯度方向相同時,起旋過程不會發(fā)生劇烈混合,降旋過程中輕流體會沖擊重流體;當(dāng)二者的梯度方向相反時,起旋過程中形成抽吸效應(yīng),其后期發(fā)生界面破碎,降旋過程中重流體沖擊輕流體.在旋轉(zhuǎn)的3個過程中,降旋過程對混合的作用最大,無論梯度方向是否相同,都會發(fā)生液體間的界面不穩(wěn)定.
[Abstract]:In this paper, two kinds of stratified fluids in a rotating cylinder vessel are studied experimentally by using planar laser-induced fluorescence and high-speed photography. The results show that the direction of density gradient and viscosity gradient of the upper and lower layers is the key factor for the instability of the interface. When the gradient direction of the two is the same, there will be no violent mixing in the starting spin process, and the light fluid will impact the heavy fluid in the process of descending rotation, and when the gradient direction of the two is opposite, the suction effect will be formed in the starting spin process, and the interface will be broken in the later stage. The heavy fluid impinges on the fluid in the process of descending rotation. In the three rotation processes, the downward rotation process has the greatest effect on the mixing, whether the gradient direction is the same or not, there will be instability of the interface between the liquids.
【作者單位】： 國民核生化災(zāi)害防護(hù)國家重點實驗室;清華大學(xué)航天航空學(xué)院;
【分類號】：TQ027.1

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