| 实验速度场测量技术及对流边界层特征研究 |
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| 作者姓名： | LI Pingyang JIANG Weimei SUN Jianning YUAN Renmin |
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| 作者单位： | Department of Atmospheric Sciences，Nanjing University，Nanjing 210093 National Meteorological Center of China，Beijing 100081，Department of Atmospheric Sciences，Nanjing University，Nanjing 210093，Department of Atmospheric Sciences，Nanjing University，Nanjing 210093，Department of Earth and Space Sciences，University of Science and Technology of China，Hefei 230026 |
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| 摘 要： | 在对流槽中对对流边界层(CBL)温度场实验研究的基础上,进一步尝试通过实验技术测量速度场并分析研究CBL中的速度场特征。在应用PIV测量技术时选用铝粉作示踪粒子。实验证明了在混合层中速度分布明显具有对流边界层热泡特性;混合层顶部的速度分布很好地反应出夹卷层的结构特征;湍流速度特征量的垂直分布合理,与野外实测结果和类似的对流槽实验结果接近;误差分析表明示踪粒子的跟随性良好,粒子速度的测量结果能真实地反应流体的运动特征,从而得证了分析结果的可靠性。
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| 关 键 词： | 对流边界层 水槽实验 PIV技术 速度场特征分析 |
A Laboratory Modeling of the Velocity Field in the Convective Boundary Layer with the Particle Image Velocimetry Technique |
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| LI Pingyang,JIANG Weimei,SUN Jianning,YUAN Renmin.A Laboratory Modeling of the Velocity Field in the Convective Boundary Layer with the Particle Image Velocimetry Technique[J].Advances in Atmospheric Sciences,2003,20(4):631-637. |
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| Authors: | LI Pingyang JIANG Weimei SUN Jianning and YUAN Renmin |
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| Affiliation: | Department of Atmospheric Sciences, Nanjing University, Nanjing 210093;National Meteorological Center of China, Beijing 100081,Department of Atmospheric Sciences, Nanjing University, Nanjing 210093,Department of Atmospheric Sciences, Nanjing University, Nanjing 210093,Department of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026 |
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| Abstract: | Based on the research of the convective boundary layer (CBL) temperature field in a convectivetank, this paper studies the characteristics of the CBL velocity field in the convective tank. Aluminiumpowder (400 order s) is used as a tracer particle in the application of the particle image velocimetry (PIV)technique. The experiment demonstrates: the velocity distribution in the mixed layer clearly possessesthe characteristics of CBL thermals; the velocity distribution in the top zone of the mixed layer showsentrainment layer characteristics; the vertical distribution of turbulent characteristic variables is reasonable,which is similar to field observations and other tank results; the error analysis demonstrates the validityof aluminium powder, which implies the reliability of the results. |
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| Keywords: | velocity field convective boundary layer (CBL) convective water tank PIV technique |
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