天然气管道泄漏孔径对激光检测的影响研究

发布时间：2018-08-28 20:02

【摘要】：管道作为输送流体的传输工具,在天然气的输配过程中扮演着巨大的作用。然而天然气管道破裂而引起的泄漏产生的危害很大,采用激光检测技术是及时发现泄漏并采取防护措施的重要手段,但泄漏扩散过程对激光检测产生一定的影响。基于对泄漏过程的分析,建立了架空天然气管道泄漏扩散和激光检测过程模型,数值分析了不同泄漏孔径下管道泄漏天然气扩散过程,探讨了其对激光检测的影响。研究结果表明:天然气管道泄漏孔径对其气体扩散影响较大,高速泄漏时随着泄漏孔径的增大,天然气扩散浓度增大,激光检测信号强度变弱。研究结果可以对管道进行有效的评价和控制,为应急救援提供依据。
[Abstract]:As a transportation tool of fluid, pipeline plays an important role in the process of natural gas transmission and distribution. However, the leakage caused by the rupture of natural gas pipeline is very harmful. Laser detection technology is an important means to detect leakage and take protective measures in time, but the leakage diffusion process has a certain impact on laser detection. Based on the analysis of leakage process, a model of leakage diffusion and laser detection for overhead natural gas pipeline is established. The diffusion process of pipeline leakage gas with different leak aperture is numerically analyzed, and its influence on laser detection is discussed. The results show that the leakage aperture of natural gas pipeline has a great influence on the gas diffusion. With the increase of the leakage aperture at high speed, the concentration of natural gas diffusion increases and the signal intensity of laser detection becomes weaker. The results can effectively evaluate and control the pipeline and provide basis for emergency rescue.
【作者单位】：广东省特种设备检测研究院茂名检测院;杭州市特种设备检测研究院;东北石油大学土木建筑工程学院;
【基金】：广东省质量技术监督局科技项目(216CT12) 国家质检总局科技计划项目(2016qk143) 国家自然科学基金项目(51274071) 中国石油科技创新基金研究项目(2015D-5006-0605)
【分类号】：TE973.6;TN247

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