吹吸扰动控制猝发过程中雷诺应力的实验

刘薇; 姜楠; 谷润平

吹吸扰动控制猝发过程中雷诺应力的实验

刘薇^1,2,
姜楠^3,4,
谷润平^1,2

1.
中国民航大学空中交通管理学院, 天津 300300
2.
天津市空管运行规划与安全技术重点实验室, 天津 300300
3.
天津大学机械工程学院力学系, 天津 300072
4.
天津市现代工程力学重点实验室, 天津 300072

基金项目: 国家自然科学基金重点资助项目(10832001); 国家自然科学基金(60832012); 国家重点基础研究发展计划(2012CB720101); 中国科学院力学研究所非线性国家重点实验室对外开放课题; 天津市高等教育学会“十二五”教育科学研究规划课题(125y065)

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出版历程
- 收稿日期: 2012-07-21
- 刊出日期: 2013-08-28

Experiments of Reynolds stress manipulation during burst by blow/suction disturbance

LIU Wei^1,2,
JIANG Nan^3,4,
GU Run-ping^1,2

1.
College of Air Traffic Management, Civil Aviation University of China, Tianjin 300300, China
2.
Tianjin Key Laboratory of Operation Programming and Safety Technology of Air Traffic Management, Tianjin 300300, China
3.
Department of Mechanics, School of Mechanical Engineering, Tianjin University, Tianjin 300072, China
4.
Tianjin Key Laboratory of Modern Engineering Mechanics, Tianjin 300072, China

摘要

摘要: 采用热线测速技术和双丝边界层热线探针,在风洞中以高于对应最小湍流时间尺度的分辨率,精细测量了平板湍流边界层施加不同频率周期性质量引射前后,不同流向和法向位置的瞬时流向、法向和展向速度分量的时间序列信号.采用流向脉动速度局部平均结构函数模极大值法检测了壁湍流猝发过程中拟序结构不同速度分量和雷诺应力分量的条件相位平均波形.发现在扰动源下游一定范围内,摩擦因数和雷诺应力幅值有所减小,扰动改变了法向或展向脉动速度与流向脉动速度的条件相位平均波形的相位差,使其保持在π/2的奇数倍左右,此时雷诺应力几乎为0,改变了湍流边界层原有雷诺应力的产生和扩散输运机制,抑制了湍流雷诺应力的产生和输运.
- 壁湍流 /
- 吹吸扰动 /
- 猝发 /
- 雷诺应力 /
- 相位差
Abstract: The time sequence signals of instantaneous longitudinal,normal and spanwise velocity components at different vertical locations on the turbulent boundary layer over a flat plate were finely measured by constant temperature anemometry and double-sensor hot-wire probe in a wind tunnel.By the criteria of the module-maximum of locally averaged longitudinal velocity structure function,the conditional phase-averaged waveforms of different velocity components and Reynolds stress were detected during the burst.After disturbance,it is found that the friction coefficients and the Reynolds stress are reduced;the phase-differences between the phase-averaged waveforms of longitudinal vertical velocity and the spanwise velocity components are changed.When their phase differences are about odd times of π/2,the Reynolds stress is depressed to about zero.The mechanisms of production,diffusion and transportation of Reynolds stress are changed in wall-bounded turbulent flow and the Reynolds stresses are restrained to a certain degree.
- wall turbulence /
- blowing and suction /
- burst /
- Reynolds stress /
- phase difference

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参考文献(18)

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