基于计算流体动力学的自然通风防辐射罩优化设计
基于计算流体动力学的自然通风防辐射罩优化设计(外文翻译,论文11300字)
摘要：地表气温在预知气候变化，气象灾害预警，进行天气预报，同化卫星资料方面起到重要作用。现代对于气温观测的精确度也越来越高。进行气温检测时，由于太阳辐射及其他环境因素会使温度传感器测得的温度高于真实的环境温度，温度传感器精度主要受太阳辐射的影响。传统的气象监测一般采取在温度传感器外装上防辐射罩和百叶箱。但是防辐射罩和百叶箱仍然带来许多问题，辐射误差较大。为了进一步提高地表气温观测的准确度从而提升在气候变化研究中的科学认识水平，本文在自然通风防辐射罩的基础上，利用计算流体动力学方法对自然通风防辐射罩的结构进行优化设计，使其具有更低的辐射误差。为得到影响因子随时间连续变化的方程，通过数据拟合分析，提出误差修订方程，进一步降低辐射误差。仿真结果显示该温度传感器具有较低的辐射误差，在地表附近通常条件下，误差量级在0.1 K，较传统的自然通风防辐射罩内1 K的误差量级，新型的温度传感器具有更为准确的气温观测结果。
关键词：温度传感器，计算流体动力学，太阳辐射，误差修正
Optimization Design of Natural Ventilation Radiation Shield Based on Computational Fluid Dynamics
Abstract: Surface temperature plays an important role in predicting climate change, warning of meteorological disasters, weather forecasting and assimilating satellite data. Modern temperature measurements are becoming more accurate. During temperature detection, the temperature measured by the temperature sensor will be higher than the real ambient temperature due to solar radiation and other environmental factors, and the accuracy of the temperature sensor is mainly affected by solar radiation. Conventional weather observations are usually made by outfitting temperature sensors with shelters and shelters. But shelters and shelters still cause many problems with big radiation errors. In order to further improve the accuracy of surface temperature observation and improve the level of scientific understanding in the research of climate change, this paper, on the basis of natural ventilation radiation shield, USES computational fluid dynamics method to optimize the structure of natural ventilation radiation shield design, so that it has a lower radiation error. In order to obtain the equation of the influence factor changing continuously with time, the error correction equation is proposed through data fitting analysis to further reduce the radiation error. The simulation results show that the temperature sensor has a low radiation error. Under normal conditions near the surface, the error is 0.1 K, which is more accurate than the error of 1 K in the traditional natural ventilation radiation shield. [资料来源：https://www.doc163.com]
Key words: Temperature sensor, computational fluid dynamics, solar radiation, error correction
[资料来源：http://www.doc163.com]
目 录
摘要 II
Abstract III
第一章 绪论 1
1.1 研究背景与意义 1
1.2 误差的来源 1
1.3 国内外研究现状 2
1.4 本文主要研究内容 3
第二章 计算流体动力学理论和基础方法 4
2.1 CFD基本概念 4
2.2 CFD三大基本方程 4
[资料来源：http://Doc163.com]
2.3 CFD网格划分和数值计算 5
第三章 新型自然通风防辐射罩的优化设计 6
3.1 新型自然通风防辐射罩的结构设计 6
3.2 仿真分析 6
3.2.1 计算流体动力学模型 6
3.2.2 ICEM网格划分 7
3.2.3 FLUENT参数设置 8
第四章 仿真结果分析 10
4.1误差验证 10
4.2尺寸优化 11
4.3 不同影响因子的研究 11
第五章 辐射误差修正 14
第六章 总结与展望 18
6.1 总结 18
6.2 展望 18
参考文献 19
致谢 21