Study on Determination of Vortex Core Radius

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Study on Determination of Vortex Core Radius

更新时间：2023-11-28

- Study on Determination of Vortex Core Radius
- Advanced Engineering Sciences Vol. 40, Issue 4, Pages: 58-61(2008)
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- Published：2008，
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叶茂,伍超,姜跃良.立轴旋涡涡核半径的研究[J].工程科学与技术,2008,40(4):58-61.

Study on Determination of Vortex Core Radius. [J]. Advanced Engineering Sciences 40(4):58-61(2008)
叶茂,伍超,姜跃良.立轴旋涡涡核半径的研究[J].工程科学与技术,2008,40(4):58-61. DOI：

Study on Determination of Vortex Core Radius. [J]. Advanced Engineering Sciences 40(4):58-61(2008) DOI：

摘要

中文摘要: 涡核半径是旋涡流场中切向速度最大位置对应的半径。由于旋涡运动的复杂性，通过测量全流场的切向速度来确定涡核半径的难度较大，而其它的确定方法也存在一定差异。通过一个易于确定的特征参数——旋涡水面线最大曲率点到中轴线的距离，来间接计算涡核半径的方法。论证了该参数与涡核半径之间存在着一个十次隐式方程的关系，讨论了关系式解的唯一性，并根据计算结果绘制了两者之间的无量纲关系曲线。对不同试验测量的旋涡水面线，采用本方法计算了涡核半径。

Abstract

Abstract:The vortex core radius is a radius at the maximum tangential velocity in the vortex flow field.As the vortex motion is complex

it is difficult to determine the vortex core radius by the measurement of the tangential velocity in the whole flow field.Besides

other determinations methods lead to some discrepancies.In this paper

an indirect determination method is proposed. The vortex core radius is calculated by an easily determined characteristic parameter

i.e.The distance from the position of the maximum water surface curvature to the vortex symmetry axis. A order tenth implicit equation between the vortex core radius and the parameter is deduced

and the unique root of the equation is discussed.According to the solution of the equation

a dimensionless curve between the two parameters is plotted.With the proposed method

the vortex core radius is determined by the vortex water surface profile

关键词

涡核半径确定方法水面线曲率

Keywords

vortex core radiusdeterminationwater surfacecurvature

references

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陈云良.伍超.叶茂.陈建叶.陈宗娜立轴旋涡多圈螺旋流场特性研究 [J].

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