| 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 |
| An laser sheet method and simulation for rapid visual detection of high pressure hydrogen leakage |
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| 中文摘要: |
| 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，但是普遍存在反映速度慢的不足。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。 |
| 英文摘要: |
| 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 light 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. 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. |
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| 中文关键词: 氢气泄漏 传感器 仿真 光面 |
| 英文关键词:hydrogen leakage sensor simulation laser sheet |
| 基金项目: |
| DOI：10.11823/j.issn.1674-5795.2020.05.07 |
| 引用本文：苗扬1,2，陈彦京3，王凯1，齐巍4，卢强4，张蒙1.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[J].计测技术,2020,(5):. |
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