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| 基于多普勒激光雷达低空风切变的数值仿真 | |
| 引用本文： | 蒋立辉,田百全,熊兴隆,庄子波,姚彬. 基于多普勒激光雷达低空风切变的数值仿真[J]. 红外与激光工程, 2012, 41(7): 1761-1766 |
| 作者姓名： | 蒋立辉 田百全 熊兴隆 庄子波 姚彬 |
| 作者单位： | 1. 中国民航大学民航气象研究所,天津,300300 2. 中国民航大学智能信号与图像处理天津市重点实验室,天津,300300 3. 总参通信训练基地,北京,102400 |
| 基金项目： | 国家自然科学基金，中央高校基金 |
| 摘 要： | 多普勒激光雷达是目前在晴空条件下对低空风切变最有效的一种探测手段。完成了基于多普勒激光雷达探测所需的微下击暴流、侧风切变和低空急流等三维变化风场的数值仿真,仿真结果得到了各种风场的基本特征。依据多普勒激光雷达的波束扫描方式,选取雷达扫描仰角为5°,扫描半径为8 km,雷达径向步长为100 m来扫描仿真风场,最后得到雷达探测变化风场的仿真径向数据。这对于深入理解风切变的产生机理以及实现由激光雷达对风切变的探测、识别和预报等后续研究具有重要意义。仿真过程建立的变化风场模型简单,模型参数变化灵活、方便实用。 |
| 关 键 词： | 数值仿真 激光雷达 风切变 Fluent软件 |
Numerical simulations of low attitude wind shear based on Doppler lidar |
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| Jiang Lihui , Tian Baiquan , Xiong Xinglong , Zhuang Zibo , Yao Bin. Numerical simulations of low attitude wind shear based on Doppler lidar[J]. Infrared and Laser Engineering, 2012, 41(7): 1761-1766 | |
| Authors: | Jiang Lihui Tian Baiquan Xiong Xinglong Zhuang Zibo Yao Bin |
| Affiliation: | 1.Civil Aviation Meteorological Institute,Civil Aviation University of China,Tianjin 300300,China; 2.Intelligent Signal and Image Processing Laboratory,Civil Aviation University of China,Tianjin 300300,China; 3.The Communication Training Base of General Staff Headquarters,Beijing 102400,China) |
| Abstract: | The Doppler lidar is one of the most effective tools for detecting the wind shear in sunny days.To meet the needs of the detecting of Doppler lidar,numerical simulations of the microburst,side wind shear and low level jet stream were accomplished first,and the simulation results showed the main characteristics of the wind fields well.The simulation wind field based on the beam scanning way of Doppler lidar was scanned,and the simulation lidar radial data was obtained.The parameters of lidar such as the scanning elevation is 5 degrees,scanning radius is 8 km and the radial step is 100 m.This is great meaningful not only for helping to understand the occurring mechanism of the wind shear,but also for the next study of realizing the detecting,recognizing and forecasting the wind shear by Doppler lidar.The simulation models are simple,flexible,convenient and functional.The parameters of the models can be changed agilely. |
| Keywords: | numerical simulation laser lidar wind shear Fluent software |
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