有障碍圆形浮力射流的绕流流态研究

槐文信; 方神光

有障碍圆形浮力射流的绕流流态研究

槐文信¹,
方神光²

水资源与水电工程科学国家重点实验室武汉大学,武汉 430072;2.清华大学水利系,北京 100084

基金项目: 国家自然科学基金资助项目(50479038)

详细信息

作者简介:
槐文信(1963- ),男,陕西乾县人,教授,博士(联系人.Tel:+86-27-68772206;Fax:+86-27-68772310;E-mail:wxhuai@whu.edu.cn).

中图分类号: O358
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- 文章访问数: 2484
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出版历程
- 收稿日期: 2005-04-02
- 修回日期: 2006-05-12
- 刊出日期: 2006-08-15

Research on Rounded Flowing States of Obstructed Buoyant Jet

HUAI Wen-xin¹,
FANG Shen-guang²

State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, P. R. China;

摘要

摘要: 针对静止环境中有障碍圆形浮力射流出现的正常绕流现象与非正常绕流现象（反射与分叉现象），分析了其主要的3个影响因素：障碍盘直径D/d（D和d分别是障碍盘和射流出口的直径），射流出口密度Froude数以及障碍盘离射流孔口的距离H/d与发生非正常绕流之间的相互关系．得到了H/d=2,4,6,8在不同D/d值时发生非正常绕流的临界密度Froude数．对直径为D/d的障碍盘，当其离射流孔口的距离H/d达到某一值时，流动仅为正常绕流流态．基于大量计算给出了不同障碍盘所要求的H/d值，综合以上因素得到了临界密度Froude数的拟合公式．对非正常绕流中射流出现反射与分叉的规律性进行了探讨．对D/d=1的有障碍浮力射流进行的数值计算表明，所有工况下的流态均为正常绕流，并得到了不同H/D条件下的轴线稀释度．
- 有障碍浮力射流 /
- 圆形射流 /
- 数值模拟 /
- 绕流流态 /
- 稀释度
Abstract: The mutual relationships of three effective factors,the diameter D/d(d is the diameter of exit) of obstructed plate,exit densimetric Froude number and the distance H/d of the plate from jet orifice for obstructed buoyant jet in static ambient,were analyzed to explain normal and abnormal rounded flowing(reverberated and bifurcated flowing).The critical Froude numbers for obstructed buoyant jets with H/d=2,4,6,8 which distinguished normal and abnormal flowing pattern were obtained.Normal rounded flowing is found only for a plate under a special value of H/d.A fitted formula of critical Froude numbers with H/d and D/d was presented to distinguish rounded flowing types.The occurring of reverberated or bifurcated flowing in abnormal rounded flow was analyzed.Based on the results of obstructed buoyant jets with D/d=1,normal rounded flowing occurred only for all conditions and axial dilution behind the plate under different H/D is obtained.
- obstructed buoyant jets /
- round jets /
- numerical simulation /
- rounded flowing pattern /
- dilution

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参考文献(17)

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[2]	Noutsopoulos G C, Yannopoulos P C. The round vertical turbulent buoyant jet [J].Journal of Hydraulic Research,1988,25(4):481—502.
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[12]	槐文信，方神光，戴会超. 静水中正方形孔口有障碍浮力射流的研究（Ⅰ）——数学模型及计算方法的验证[J].应用数学和力学，2006,27(5):571—578.
[13]	槐文信，方神光，戴会超.静水中正方形孔口有障碍浮力射流的研究（Ⅱ）——流场特性分析[J].应用数学和力学，2006,27(5):579—587.
[14]	槐文信，方神光.静止环境中有阻力圆盘浮射流特性的研究（Ⅰ）——数学模型及计算方法的验证[J].水科学进展，2004,15(5):549—554.
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[17]	HUAI Wen-xin, Komatsu T, ZENG Xiao-hui. Numerical simulation of residual circulation due to bottom roughness variability under tidal flows in a semi-enclosed bay[J].China Ocean Engineering,2005,19(4):601—612.

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有障碍圆形浮力射流的绕流流态研究

作者简介:
槐文信(1963- ),男,陕西乾县人,教授,博士(联系人.Tel:+86-27-68772206;Fax:+86-27-68772310;E-mail:wxhuai@whu.edu.cn).

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Research on Rounded Flowing States of Obstructed Buoyant Jet

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留言板

有障碍圆形浮力射流的绕流流态研究

作者简介: 槐文信(1963- ),男,陕西乾县人,教授,博士(联系人.Tel:+86-27-68772206;Fax:+86-27-68772310;E-mail:wxhuai@whu.edu.cn).

计量

出版历程

Research on Rounded Flowing States of Obstructed Buoyant Jet

计量

出版历程

目录

作者简介:
槐文信(1963- ),男,陕西乾县人,教授,博士(联系人.Tel:+86-27-68772206;Fax:+86-27-68772310;E-mail:wxhuai@whu.edu.cn).