1 中国海洋大学海洋遥感研究所,山东 青岛 266100
2 青岛海洋科学与技术国家实验室区域海洋动力学与数值模拟功能实验室,山东 青岛 266100
低空风效应是指在特定的风况条件下,机场建筑物或其他位于跑道附近的人工结构对气流 造成显著扰动的现象,该效应易引起湍流甚至是出现风切变,进而给飞机的升降过程带来困难。 采用计算流体动力学(Computational fluid dynamics, CFD)方法对首都机场进行风场模拟, 并基于CFD在输入风速设置上的局限性,提出一种将高精度、高分辨率的激光雷达测风数据 导入CFD的方法,来研究这些地物对首都机场风速的影响。通过对模拟结果的分析,在风速 为11～15 m/s的西北风条件下的东跑道以及在同等风速的东南风条件下的西跑道与中间跑道均受到较大影响。
低空风效应 激光雷达 计算流体动力学方法 风场模拟 low-level wind effect lidar computational fluid dynamics nethod wind field simulation 大气与环境光学学报
2019, 14(4): 259
Author Affiliations
Abstract
Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
To increase the photoelectronic conversion efficiency of the single discharge tube and to meet the requirements of the laser cutting system, optimization of the discharge tube structure and gas flow field is necessary. We present a computational fluid dynamic model to predict the gas flow characteristics of high-power fast-axial flow CO2 laser. A set of differential equations is used to describe the operation of the laser. Gas flow characteristics, are calculated. The effects of gas velocity and turbulence intensity on discharge stability are studied. Computational results are compared with experimental values, and a good agreement is observed. The method presented and the results obtained can make the design process more efficient.
高功率轴快流CO2激光器 放电管结构 气体流动特性 计算流体动力学方法 优化设计 000.4430 Numerical approximation and analysis 140.3425 Laser stabilization 140.3470 Lasers, carbon dioxide Chinese Optics Letters
2011, 9(1): 011401
