Journal of Liaoning Petrochemical University

Journal of Liaoning Petrochemical University ›› 2016, Vol. 36 ›› Issue (4): 18-23.DOI: 10.3969/j.issn.1672-6952.2016.04.005

Previous Articles     Next Articles

Numerical Simulation of Leakage and Diffusion of Indoor Liquefied Petroleum Gas

Zhai Meiyu1Ma Guiyang1Wang Zicheng1Bian Chongyang2   

  1. 1.College of Petroleum EngineeringLiaoning Shihua UniversityFushun Liaoning 113001China; 2.Tianjin Guodian Jinneng Binhai Thermal Electricity Co.Ltd.Tianjin 300459China

  • Received:2016-05-06 Revised:2016-07-07 Published:2016-07-20 Online:2016-08-24

室内液化石油气泄漏扩散数值模拟

翟美玉1,马贵阳1,王梓丞1,边重阳2   

  1. (1.辽宁石油化工大学石油天然气工程学院,辽宁抚顺113001;2.天津国电津能滨海热电有限公司,天津300459)
  • 通讯作者: 马贵阳(1965-),男,博士,教授,从事计算流体力学及多孔介质传热传质的研究;E-mail:guiyangma1@163.com。
  • 作者简介:翟美玉(1990-),女,硕士研究生,从事城市燃气泄漏方面的研究;E-mail:273644526@qq.com。

Abstract:

Liquefied petroleum gas belongs to dangerous gas, once the leakage occurs, the consequences are serious. So its security problem is very important. According to the characteristics of LPG leakage, a physical model of leakage and diffusion in the limited space was established, and the diffusion process of the gas leakage was simulated. The internal flow field of the diffusion process was analyzed through simulation results, and the different of the diffusion processes were compared under the different relative humidity. The results showed that due to the moving eddy in the air, the velocity vector of the gas diffusion change from one side was higher than the other side to the other side was higher. The increase of wind speed would accelerate the generation and movement of the eddy, and the concentration distribution of C3H8 would change acutely. When the air relative humidity increased, the gas descended faster, and in the plane below the leakage point, the humidity increased, the concentration of C3H8 was higher, the alarm time of the liquefied petroleum gas alarm device would be shortened.

Key words: Liquefied petroleum gas, Leakage diffusion, Numerical simulation, Internal flow field, Relative humidity

摘要: 液化石油气是一种危险性气体,一旦发生泄漏,所造成的后果是非常严重的,所以其安全问题很重要。针对液化石油气的特点,建立有限空间内部发生泄漏扩散的物理模型,并对液化石油气泄漏扩散的过程进行了数值模拟。通过模拟结果分析了其扩散过程的内部流场,并对比了相对湿度不同时其扩散过程的变化规律。结果表明,由于受空气中涡流移动的影响,泄漏点两侧气体扩散的速度矢量由起初的一侧高另一侧低变为一侧低另一侧高;风速增大,加快涡流的产生和移动速度,使C3H8的质量分数分布变化更剧烈;相对湿度较大时气体的下降速度比湿度小时更快,在低于泄漏点高度的平面内,湿度增大,C3H8的质量分数也变大,缩短液化石油气报警器的报警时
间。

关键词: 液化石油气, 泄漏扩散, 数值模拟, 内部流场, 相对湿度

Cite this article

Zhai Meiyu, Ma Guiyang, Wang Zicheng, Bian Chongyang.

Numerical Simulation of Leakage and Diffusion of Indoor Liquefied Petroleum Gas[J]. Journal of Liaoning Petrochemical University, 2016, 36(4): 18-23.

翟美玉, 马贵阳, 王梓丞, 边重阳. 室内液化石油气泄漏扩散数值模拟[J]. 辽宁石油化工大学学报, 2016, 36(4): 18-23.