室内液化石油气泄漏扩散数值模拟

Numerical Simulation of Leakage and Diffusion of Indoor Liquefied Petroleum Gas

翟美玉 马贵阳 王梓丞 边重阳

Zhai Meiyu Ma Guiyang Wang Zicheng Bian Chongyang

(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)

1.College of Petroleum Engineering，Liaoning Shihua University，Fushun Liaoning 113001，China； 2.Tianjin Guodian Jinneng Binhai Thermal Electricity Co.，Ltd.，Tianjin 300459，China

关键词: 液化石油气, 泄漏扩散, 数值模拟, 内部流场, 相对湿度

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.

10.3969/j.issn.1672-6952.2016.04.005