百叶箱内部风场特征仿真分析  

Simulation Analysis of Wind Field Characteristics inside the Reinforced Plastics Screen

作　　者：杨显轲 严家德[1] 郭建侠[3] 王巍巍[1,2] 刘倩[1,2] 姜枫 YANG Xianke;YAN Jiade;GUO Jianxia;WANG Weiwei;LIU Qian;JIANG Feng(Key Laboratory for Aerosol–Cloud–Precipitation of China Meteorological Administration,Nanjing University of Information Science and Technology,Nanjing 210044;Integrated Meteorological Observing Training and Practice Base of China Meteorological Administration(Nanjing),Nanjing 210044;Meteorological Exploration Center,China Meteorological Administration,Beijing 100081)

机构地区：[1]南京信息工程大学中国气象局气溶胶与云降水重点开放实验室,南京210044 [2]中国气象局气象综合观测培训实习基地(南京),南京210044 [3]中国气象局气象探测中心,北京100081

出　　处：《气候与环境研究》2018年第4期493-503,共11页Climatic and Environmental Research

基　　金：国家自然科学基金(NSFC41505136);公益性行业(气象)科研专项(GYHY201106049);南京信息工程大学本科生地球科学类实验课程创新项目(SYCX201627)~~

摘　　要：流经传感器的风速是决定百叶箱气温测量精度的主要因素之一。基于计算流体动力学CFD仿真,对我国地面气象观测中广泛应用的玻璃钢百叶箱内部风场特征进行了研究。结果表明,受长方体结构特征以及侧面叶片导流的影响,百叶箱内部风场具有明显的非均一性特征,在水平剖面和垂直剖面上分别出现明显的梭形流场和环形流场;百叶箱对环境空气的流动具有明显的阻挡作用,平均相对风速减小率在箱体中轴线上存在明显的垂直差异,最小值53%出现在0.08 m附近,同时在0.25 m和0.55 m高度附近分别存在值为85%和88%的局部最大值。平均相对风速减小率随环境风向的改变而呈周期性变化,当环境风向与箱体侧面成45°、135°、225°和315°时,出现极小值73%,当环境风向与箱体侧面成0°、90°、180°和270°时,出现极大值93%。The wind flowing through the sensor is one of the main factors determining the accuracy of the temperature measurement of reinforced plastics screen.Based on the computational fluid dynamics(CFD)simulation,the relationship between the wind of reinforced plastics screen and the environmental wind which is widely used in surface meteorological observation is studied.The results show that due to the influence of the cuboid structure and the lateral vane diversion,the wind of reinforced plastics screen is obviously inhomogeneous.Obvious fusiform flow and annular flow fields appear on the horizontal and vertical profiles,respectively.Reinforced plastics screen has significant blocking effect on the flow of air.There is vertical difference in the average relative wind speed reduction ratio along the axis of reinforced plastics screen,and the minimum is 53%at around 0.08-m height.At the heights of around 0.25 m and 0.55 m,the local maximum values of average relative wind speed reduction ratio can reach up to 85%and 88%,respectively.The average relative wind speed reduction ratio varies periodically with changes in the environmental wind direction.When the wind directions are 45°,135°,225°,and 315°,the minimum value is 73%.When the wind direction is 0°,90°,180°,and 270°,the maximum value is 93%.

关 键 词：风速风向 玻璃钢百叶箱 CFD仿真 平均相对风速减小率 

分 类 号：P461[天文地球—大气科学及气象学]