| 自由射流缩流机理研究 |
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| 引用本文： | 韩凤琴,肖业祥,久保田乔,刘洁.自由射流缩流机理研究[J].工程热物理学报,2004,25(3):421-423. |
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| 作者姓名： | 韩凤琴 肖业祥 久保田乔 刘洁 |
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| 作者单位： | 华南理工大学电力学院动力系,广东,广州,510640;华中科技大学,湖北,武汉,430074 |
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| 基金项目： | 国家自然科学基金(No.50379015) |
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| 摘 要： | 与喷到水中的水喷流(潜喷流 submerged jet)不同,喷到大气中水的喷流(自由喷流 free jet)从喷嘴喷出后会发生缩流,然后再渐渐扩散,但这种缩流的流动机理迄今都没有被非常清楚的描述。本文对喷管喷出的射流进行了详细的非定常粘性流动解析,究明了产生缩流时准自由射流区域内压能转化为动能的机理,并用数值计算方法对自由射流的缩流直径进行了预测。
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| 关 键 词： | 自由射流 多相流 数值解析CFD 缩流机理 能量损失 |
| 文章编号： | 0253-231X(2004)03-0421-03 |
| 修稿时间： | 2003年12月5日 |
STUDY ON THE CONTRACTION MECHANISM OF FREE JET |
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| HAN Feng-Qin,XIAO Ye-Xiang,KUBOTA Takashi,LIU Jie Electric Power School,South China University of Technology,GuangZhou ,China Huazhong University of Science and Technology,Wuhan ,China.STUDY ON THE CONTRACTION MECHANISM OF FREE JET[J].Journal of Engineering Thermophysics,2004,25(3):421-423. |
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| Authors: | HAN Feng-Qin XIAO Ye-Xiang KUBOTA Takashi LIU Jie Electric Power School South China University of Technology GuangZhou China Huazhong University of Science and Technology Wuhan China |
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| Institution: | HAN Feng-Qin,XIAO Ye-Xiang,KUBOTA Takashi,LIU Jie Electric Power School,South China University of Technology,GuangZhou 510640,China Huazhong University of Science and Technology,Wuhan 430074,China |
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| Abstract: | Different from the submerged jet, the water jet emerged out of the nozzle contract firstly,
then (the jet's section) enlarged gradually. Hitherto, the flow mechanism between the nozzle throat
and the contraction section is not clarity. The paper presents a lump sum numerical analysis of the
unsteady viscosity water jet flow, to clarify the flow niechanism of pressure energy transferred into
kinetic energy in the needle wake of semi-free jet. Moreover, the velocity and diameter of contraction
section will also be predicted through numerical analysis. |
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| Keywords: | free jet multi-phase flow numerical analysis CFD jet contraction mechanism energy loss |
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