基于计算流体动力学的探空温度传感器太阳辐射误差修正方法  

A Method Based on Computational Fluid Dynamics for Solar Radiation Error Correction of Sounding Temperature Sensors

作　　者：张利 刘清惓[1,2] 杨荣康 张加宏[1,2] 李敏[1,2] 戴伟 

机构地区：[1]江苏省气象探测与信息处理重点实验室,南京210044 [2]南京信息工程大学,电子与信息工程学院,南京210044 [3]中国气象局气象探测中心,北京100081 [4]南京信息工程大学,大气物理学院,南京210044

出　　处：《传感技术学报》2013年第1期78-83,共6页Chinese Journal of Sensors and Actuators

基　　金：国家公益性行业(气象)科研专项(GYHY200906037、GYHY201106048);国家自然科学基金项目(41075026);江苏高校优势学科建设工程(“传感网与现代气象装备”项目);江苏省科技支撑计划重点项目(BE2011006)共同资助

摘　　要：高空大气温度是天气预报和气候变化研究所需的关键观测资料,随着对防灾减灾和应对气候变化能力要求的提高,希望探空温度传感器的准确度达到0.1℃量级,而太阳辐射引起的误差可达3℃量级甚至更高,已成为制约探空温度观测精度提高的瓶颈。本文利用计算流体动力学(CFD)方法对探空温度传感器从地面到32 km高空不同气压和多种引线夹角以及太阳高度角条件下的辐射误差效应进行求解,获得了辐射误差—海拔高度曲线族。研究结果表明,引线夹角以及太阳高度角是太阳辐射误差的重要影响因子。海拔高度与太阳辐射误差之间呈现出随海拔高度的增加斜率不断增大的类抛物线关系。Air temperature of high altitude is considered as an important factor in both weather forecast and climate change research. Due to the increasing amount of attention that has been focused on disaster prevention as well as the need of dealing with climate change, it is expected that the accuracy of the measurement air temperature with high altitude can reach to 0.1 ℃. However,the errors caused by solar radiation may reach 3 ℃ or worse in upper air, which has become the bottleneck when improving the accuracy. A computational fluid dynamics （CFD） method is employed to study the errors induced by solar radiation, under the condition of various air pressures, lead angle, solar incident angle, from sea level to 32 km altitude. The results show that lead angle and solar incident angle are important factors that affect the errors. With the increasing of sea level elevation, the solar heating error appears a parabola correlation ,which owns a growing slop.

关 键 词：温度传感器 太阳辐射误差 计算流体动力学 珠状热敏电阻 探空仪 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]