A Laboratory Modeling of the Velocity Field in the Convective Boundary Layer with the Particle Image Velocimetry Technique |
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作者姓名: | 李萍阳 蒋维楣 孙鉴泞 袁仁民 |
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作者单位: | [1]NationalMeteorologicalCenterofChina,Beijing100081 [2]DepartmentofAtmosphericSciences,NanjingUniversity,Nanjing210093 [3]DepartmentofEarthandSpaceSciences,UniversityofScienceandTechnologyofChina,Hefei230026 |
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摘 要: | Based on the research of the convective boundary layer (CBL) temperature field in a convective tank, this paper studies the characteristics of the CBL velocity field in the convective tank. Aluminium powder (400 orders) 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 possesses the characteristics of CBL thermals; the velocity distribution in the top zone of the mixed layer shows entrainment 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 validity of aluminium powder, which implies the reliability of the results.
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关 键 词: | 对流边界层 对流槽 PIV技术 速度场特征 实验 激光粒子成像速度场测量技术 大气动力学 运动特征 |
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