| 管内流体交变流动速度的横向分布研究 |
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| 引用本文： | 康慧芳,李青,周刚,张勇,李正宇. 管内流体交变流动速度的横向分布研究[J]. 低温工程, 2007, 0(3): 11-15 |
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| 作者姓名： | 康慧芳 李青 周刚 张勇 李正宇 |
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| 作者单位： | 中国科学院理化技术研究所,北京,100080;中国科学院研究生院,北京,100039;中国科学院理化技术研究所,北京,100080;华中科技大学制冷与低温实验室,武汉,430074 |
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| 摘 要： | 基于线性理论分析,考虑流体的可压缩性、速度横向分布的相位延迟,对微扰项使用Fourier变换,给出充分发展、层流交变流动管内速度分布解析解.给出的解析解适用于描述各种小振幅振型的振荡,体现出流体速度横向分布的相位延迟,并验证了交变流动状态下的"环形效应".关于流体速度横向分布的解析解给出了流体在谐振状态下的速度分布函数,与肖家华在热声研究中使用常规摄动分析方法假设微扰项以单一频率振荡条件下得到的解析解一致.分析了可压缩流体和不可压缩流体在理论模型上的区别.
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| 关 键 词： | 交变流动 横向速度分布 环形效应 热声 |
| 文章编号： | 1000-6516（2007）03-0011-05 |
| 修稿时间： | 2007-12-12 |
Transverse distribution of axial velocity on oscillating flow in circular tube |
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| Kang Huifang,Li Qing,Zhou Gang,Zhang Yong,Li Zhengyu. Transverse distribution of axial velocity on oscillating flow in circular tube[J]. Cryogenics, 2007, 0(3): 11-15 |
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| Authors: | Kang Huifang Li Qing Zhou Gang Zhang Yong Li Zhengyu |
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| Affiliation: | 1Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China;2 Graduate School of Chinese Academy of Sciences, Beijing 100039, China;3Cryogenic laboratory, Huazhong University of Science and Technology, Wuhan 430074, China |
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| Abstract: | The transverse distribution of axial velocity on oscillating flow in circular tube was reported.Based on the linear theory and introducing the assumption of fully developed parallel oscillating flow in circular tube,the transverse distribution of axial velocity has been found using Fourier transform as well as considering the compressibility of the fluid and the phase lag of the velocity along the radius.The analytical solution could describe the mode of low amplitude oscillation and present the phase lag of the axial velocity distribution.The phenomena of annular effect of oscillation flow have also been verified.By the property of Fourier transform,elements of simple harmonic part of the solution are given in the identical form with that of Xiao's solution.Moreover,the difference between the compressible and incompressible fluid has been analyzed. |
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| Keywords: | oscillating flow transverse velocity annular effect thermoacoustic |
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