| 摘要: |
| 热源羽流是普遍存在于日常生活与工作中的一种气流形态，但对通风气流营造舒适的室内环境会造成明显干扰。为避免测试仪器对热源羽流场的干扰，本文采用2D-PIV系统拼接技术对不同热源强度、尺寸的面源羽流进行竖向区域测量，得到更加准确的运动特征方程和全局流场分布。以此实测数据，对面源羽流的轴心速度、扩展半径公式进行拟合系数讨论，得到一个简便且较为准确的圆形面源羽流轴心速度表达式，并对式中的系数进行拟合修正。结果表明：在热源半径为0.050～0.125m，热源散热量为40～120W之间能够较好的反映出热羽流轴心速度随远离热源高度的变化关系。 |
| 关键词: 热源羽流 PIV系统 轴心速度 热源尺寸 |
| DOI： |
| 投稿时间：2020-02-29 修订日期：2020-11-25
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| 基金项目:上海市自然科学基金项目（16ZR1423200）,机械行业创新平台项目（2019SA-10-07）和山东省建设厅开发项目（K2019370）资助。 |
|
| Experimental Investigation on Axisymmetric Surface Source Plume with Particle Image Velocimetry |
|
Wang Xin, Song Bingyan, Zhang Yujie, Xu Yukun, Wang Fei
|
| (School of Environment and Architecture, University of Shanghai for Science and Technology) |
| Abstract: |
| Heat source plumes are a type of airflow pattern that universally exists in daily life and work. However, it causes a considerable interference to the ventilation airflow which helps in creating a comfortable indoor environment. In this study, to avoid the interference of the test instrument on the heat source plume, a two-dimensional particle image velocimetry system with splicing technology was applied to measure the vertical area of the surface-source plumes with different heat source strengths and sizes so that more accurate motion characteristic equations and global airflow distribution can be obtained. Based on the measured data, the axial velocity and expansion radius of the surface-source plume were fitted by formulas and the fitting coefficients were discussed. A simple and accurate expression of the axial velocity of the plume from a circular area source was obtained and the coefficients in the formula were fitted and corrected. The radius of the heat source was in the range of 0.05–0.125 m, while the heat dissipation capacity was in the range of 40–120 W, which could better reflect the relationship between the axial velocity of the thermal plume and height away from the heat source. |
| Key words: heat source plume particle image velocimetry system axis speed heat source size |
