光面式高压氢气泄漏快速可视化检测方法及数值仿真研究  

A Laser Sheet Method and Simulation for Rapid Visual Detection of High Pressure Hydrogen Leakage

作　　者：苗扬[1,2] 陈彦京 王凯[1] 齐巍 卢强 张蒙 MIAO Yang;CHEN Yanjing;WANG Kai;QI Wei;LU Qiang;ZHANG Meng(Beijing University of Technology,Faculty of Materials and Manufacturing,Beijing 100124,China;Beijing University of Technology,Beijing Key Laboratory of Advanced Manufacturing Technology,Beijing 100124,China;China Aerospace Science and Industry Corporation Limited,Beijing 100074,China;Beijing CATARC Technology Center Co.,Ltd.,Beijing 100070,China)

机构地区：[1]北京工业大学材料与制造学部,北京100124 [2]北京工业大学先进制造北京市重点实验室,北京100124 [3]中国航天科工集团第三研究院,北京100074 [4]北京卡达克科技中心有限公司,北京100070

出　　处：《计测技术》2020年第5期37-42,共6页Metrology & Measurement Technology

基　　金：国家自然科学基金项目(51975011);国家重点研发计划(2018YFE0105300)。

摘　　要：针对高压氢泄漏扩散的检测问题,国内外学者利用实验和数值模拟等方法进行了相关研究,提出了一些检测方法,这些检测方法结果可靠,但是普遍的不足之处是检测反应速度慢。本文提出了一种光面式高压氢气泄漏快速可视化检测方法,利用半导体激光器发射激光,通过柱面透镜组及反射镜后形成光面(laser sheet)照射储氢罐,利用安装在储氢罐上方特定位置的CCD相机拍照采集图像并传输至计算机,经数字图像处理后对高压氢气泄漏情况进行鉴别。基于该方法开展仿真实验,建立高压氢气射流的分层流动模型,实验结果与前人研究的实验公式吻合,证明了该方法的可行性;开展了泄漏口直径为1 mm时,3,5,7 MPa压强的仿真实验,以及压强为5 MPa时泄漏口直径为0.5,1,1.5 mm的仿真实验,获得了高压氢气泄漏口直径与特定高度、气射流边界层直径的解析关系,以及高压氢气压力与射流边界层直径的解析关系,为实现高压氢气泄漏快速准确检测提供了有力支撑。For the detection of high pressure hydrogen leakage and diffusion,domestic and foreign scholars have carried out relevant research by using experiment and numerical simulation,and put forward some detection methods.These detection methods have reliable results,but generally have the shortcomings of slow response.In this paper,a fast visual detection method of high pressure hydrogen leakage based on laser sheet is proposed.The laser is emitted by a semiconductor laser,and a laser sheet is formed after passing through a cylindrical lens group and a mirror to illuminate the hydrogen storage tank.A CCD camera installed at a specific locution above the hyarogen storage tank takes pictures and transmits them to a computer.The high-pressure hydrogen leakage was identified after digital image processing.Based on this method,the layered flow model of high-pressure hydrogen jet is established.The experimental results are consistent with the previous experimental formula,which proves the feasibility of the method;the simulation experiments of 3,5,7 MPa pressure when the leakage diameter is 1 mm,and 0.5,1,1.5 mm leakage diameter when the pressure is 5 MPa are carried out.The analytical relationship between the diameter of high pressure hydrogen leak and the specific height,the diameter of gas jet boundary layer,and the analytical relationship between the pressure of high pressure hydrogen and the diameter of jet boundary layer are obtained by the simulation experiment,which provides a strong support for the rapid and accurate detection of high-pressure hydrogen leakage.

关 键 词：氢气泄漏 传感器 仿真 光面 

分 类 号：TB9[一般工业技术—计量学]