| 流速比对颗粒在液固两相平板混合层中沉降的影响 |
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| 引用本文： | 周欣,王赫阳,王希麟,张会强,郭印诚,林文漪. 流速比对颗粒在液固两相平板混合层中沉降的影响[J]. 工程热物理学报, 2000, 21(5): 587-589 |
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| 作者姓名： | 周欣 王赫阳 王希麟 张会强 郭印诚 林文漪 |
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| 作者单位： | 清华大学工程力学系,北京 100084;清华大学工程力学系,北京 100084;清华大学工程力学系,北京 100084;清华大学工程力学系,北京 100084;清华大学工程力学系,北京 100084;清华大学工程力学系,北京 100084 |
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| 基金项目： | 国家自然科学基金!（No．19672029） |
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| 摘 要： | 本文采用流动显示的方法对平板混合层中上下层流体速度比对固体颗粒在混合层中沉降的影响进行了研究。实验中分别采用粒径小于 ４０ ｕｍ,粒径 ９８～１０４ｕｍ,粒径 １５４～１６０ｕｍ的玻璃微珠以及环氧树脂作为固相颗粒,对这些颗粒在速度比分别为１：１．２、１：２和１：２．８的液相混合层中的运动进行了显示。结果表明混合层中大涡结构对固体颗粒的沉降具有迟滞作用,其作用程度取决于混合层中上下层流体速度比。速度比越大,颗粒的沉降越慢。
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| 关 键 词： | 混合层 液固两相流 流动显示 |
| 文章编号： | 0253-231X(2000)05-0587-03 |
| 修稿时间： | 1999-06-23 |
THE EFFECT OF VELOCITY RATIO ON THE PARTICLE SEDIMENTATION IN LIQUID-SOLID TWO PHASE PLANE MIXING LAYER |
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| ZHOU Xin,WANG Heyang,Wang Xilin,ZHANG Huiqiang,Guo Yincheng,Lin Wenyi. THE EFFECT OF VELOCITY RATIO ON THE PARTICLE SEDIMENTATION IN LIQUID-SOLID TWO PHASE PLANE MIXING LAYER[J]. Journal of Engineering Thermophysics, 2000, 21(5): 587-589 |
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| Authors: | ZHOU Xin WANG Heyang Wang Xilin ZHANG Huiqiang Guo Yincheng Lin Wenyi |
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| Abstract: | The effects of velocity ratio of free streams on the particle sedimentation in liquid-solid two phase plane mixing layer are studied by flow visualization method. The glass spheres with three diameter ranges (less than 40 um, 98~104 pm and 154~160 um) and epoxy particles are used as solid phase respectively. The motion of these solid phase particles are visualized in mixing layers with velocity ratio 1:1.2, 1:2 and 1:2.8, respectively. The visualization show that the large vortex structures counteract the sedimentation of particles in mixing layer. The intensity of counteraction is determined by the velocity ratio between two free streams of mixing layer. The more the velocity ratio, the slower the particle sedimentation. |
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| Keywords: | mixing layer liquid-solid two phase flow flow visualization |
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