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槽道内涡波流场展向涡的分布特征

陈彬 刘阁 金兴 邓阳琴

陈彬, 刘阁, 金兴, 等 . 槽道内涡波流场展向涡的分布特征[J]. 北京航空航天大学学报, 2017, 43(11): 2240-2248. doi: 10.13700/j.bh.1001-5965.2016.0934
引用本文: 陈彬, 刘阁, 金兴, 等 . 槽道内涡波流场展向涡的分布特征[J]. 北京航空航天大学学报, 2017, 43(11): 2240-2248. doi: 10.13700/j.bh.1001-5965.2016.0934
CHEN Bin, LIU Ge, JIN Xing, et al. Distribution characteristics of spanwise vortex of vortex wave field in channel flow[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(11): 2240-2248. doi: 10.13700/j.bh.1001-5965.2016.0934(in Chinese)
Citation: CHEN Bin, LIU Ge, JIN Xing, et al. Distribution characteristics of spanwise vortex of vortex wave field in channel flow[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(11): 2240-2248. doi: 10.13700/j.bh.1001-5965.2016.0934(in Chinese)

槽道内涡波流场展向涡的分布特征

doi: 10.13700/j.bh.1001-5965.2016.0934
基金项目: 

国家自然科学基金 51375516

重庆市基础与前沿研究计划 cstc2016jcyjA0185

详细信息
    作者简介:

    陈彬  男, 博士, 教授。主要研究方向:流体动力学

    通讯作者:

    陈彬, E-mail:hustchb@163.com

  • 中图分类号: O357.4+3

Distribution characteristics of spanwise vortex of vortex wave field in channel flow

Funds: 

National Natural Science Foundation of China 51375516

Chongqing Basic and Frontier Research Project cstc2016jcyjA0185

More Information
  • 摘要:

    通过2DPIV测量了槽道内涡波流场的瞬态速度矢量场,利用雷诺分解和旋转强度的λci准则进行了展向涡的识别;并从识别的逆时针和顺时针展向涡的尺度属性、力学属性和运动属性方面分析了展向涡的分布特征。结果表明,流场中的顺时针展向涡的数量大于逆时针展向涡的数量;在法向位置0.05~0.45范围内,逆时针展向涡的旋转强度呈抛物线形状变化,顺时针展向涡整体呈下降趋势;逆时针展向涡的平均直径和椭圆平均长轴长度随着法向位置的增加而缓慢增加,而顺时针展向涡趋于下降;逆时针展向涡的椭圆长轴倾角最大值为67.28°,顺时针展向涡的等效椭圆的离心率呈下降趋势,似圆性较好;逆时针展向涡对全局平均的〈z〉分量在法向位置0.15处出现最大值61%;展向涡对流场雷诺应力的影响较小;逆时针展向涡的数量密度在0~0.08法向位置范围内呈急剧上升趋势,并达到最大值0.36,顺时针展向涡数量密度整体呈倒U形分布;不同旋向的展向涡占总展向涡数量密度的比值都大于0.3;展向涡的流向对流速度整体上小于流场的平均速度,且在槽道中心区域差值较大;展向涡的法向对流速度随着法向距离增加,从负值上升到正值,在中心主流两侧分别发生喷射和扫掠2种现象。

     

  • 图 1  实验系统

    Figure 1.  Experimental system

    图 2  涡波流场的展向涡λci准则识别结果

    Figure 2.  Identification results of spanwise vortex λci criteria in vortex wave field

    图 3  展向涡的平均直径和平均长轴长度

    Figure 3.  Mean diameter and mean length of long axis of spanwise vortex

    图 4  展向涡的长轴倾角和离心率

    Figure 4.  Long axis inclination angle and eccentricity of spanwise vortex

    图 5  展向涡的旋转强度和涡量

    Figure 5.  Rotational strength and vorticity of spanwise vortex

    图 6  展向涡对的〈z〉分量和雷诺应力分量

    Figure 6.  z〉 component and Reynolds stress component of spanwise vortex pair

    图 7  展向涡的数量密度和数量比值

    Figure 7.  Population density and quantity ratio of spanwise vortex

    图 8  展向涡的对流速度

    Figure 8.  Convective velocity of spanwise vortex

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出版历程
  • 收稿日期:  2016-12-12
  • 录用日期:  2017-01-20
  • 刊出日期:  2017-11-20

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