摘要
天然气管道小孔泄漏是一种常见且隐蔽的泄漏形式,对能源效率和环境安全带来威胁。探讨天然气管道泄漏孔径对周围温度变化的影响,研究采用测温实验系统,通过控制不同的泄漏孔径,观察其对周围温度变化的影响。实验过程中,重点考察了焦耳-汤姆逊效应和涡流效应在泄漏初期的温度变化特征,同时考虑了背景温度对泄漏过程中温度变化的影响。实验结果显示,随着泄漏孔径的增大,周围温度的下降速度加快,温度变化率也显著提高。在泄漏初期,由于焦耳-汤姆逊效应和涡流效应的共同作用,温度变化最为明显。此外,背景温度较高时,温度变化率也随之增大。通过对实验数据的分析,验证了泄漏孔径平方与温度变化率成正比的关系。这一现象为基于温度变化的天然气泄漏监测方法提供了有力的理论依据,并可为天然气管道安全监测技术的发展提供参考。
Small-hole leakage in natural gas pipelines is a common and concealed form of leakage,posing threats to energy efficiency and environmental safety.This study explores the influence of natural gas pipeline leakage hole diameter on the surrounding temperature changes.A temperature measurement experimental system is adopted,where different leakage hole diameters are controlled to observe their effects on the surrounding temperature variations.During the experiment,the temperature change characteristics of the Joule-Thomson effect and eddy current effect in the initial stage of leakage are focused on,while the impact of background temperature on temperature changes during the leakage process is also considered.The experimental results show that as the leakage hole diameter increases,the rate of temperature drop in the surrounding area accelerates,and the temperature change rate also significantly increases.In the initial stage of leakage,the temperature change is most obvious due to the combined effect of the Joule-Thomson effect and eddy current effect.In addition,when the background temperature is higher,the temperature change rate also increases accordingly.Through the analysis of experimental data,it is verified that the relationship that the square of the leakage hole diameter is proportional to the temperature change rate.This phenomenon provides a strong theoretical basis for natural gas leakage monitoring methods based on temperature changes,and may offer references for the development of natural gas pipeline safety monitoring technology.
作者
赵越东
王海明
杜磊
徐宝昌
李中林
蔡永军
ZHAO Yuedong;WANG Haiming;DU Lei;XU Baochang;LI Zhonglin;CAI Yongjun(China University of Petroleum(Beijing);Science and Technology Research Institute,PipeChina;Central China Branch,PipeChina;Northeast Branch,PipeChina)
出处
《油气田地面工程》
2025年第12期23-30,共8页
Oil-Gas Field Surface Engineering
基金
国家重点研发计划项目“跨地域复杂油气管网安全高效运行状态监测传感系统及应用”(2022YFB3207600)。
关键词
天然气管道小孔泄漏
温度变化率
泄漏孔径
背景温度
small-hole leakage of natural gas pipelines
temperature change rate
leakage hole diameter
background temperature
