摘要
化学危险品的意外泄漏已经造成很多事故,尤其是在隧道这样相对封闭的空间内,事故发生的概率更大。为了有效地控制和预防事故的发生,本文以RANS方程为控制方程,采用基于simple算法的有限体积法,对隧道内危险性介质泄漏扩散过程进行了数值模拟。讨论隧道内危险品(乙炔)运载车在行驶过程中发生小孔泄漏扩散的情况,计算得到了危险性介质浓度的时间和空间分布规律。同时,分析了运载车不同行驶速度和危险品泄漏释放方式(水平释放和垂直释放)对其扩散过程的影响,为进一步了解危险性介质的扩散行为和控制方式提供了理论基础。
A lot of accident cases have been caused by the leakage and dispersion process of hazardous materials. If the leakage cases happen in the close space like tunnel, the danger will be serious. In order to prevent and reduce this accident, the Reynolds-averaged Navier-Stokes equations were solved based on the method of finite control volume and Simple scheme, and the numerical computation of small beach leakage of the truck filled with hazardous materials were conducted. The profiles of concentration are given, and different velocity and leakage position were discussed , which will give theory basis of controlling the dispersion and reducing leakage accident.
出处
《空气动力学学报》
CSCD
北大核心
2006年第2期256-260,共5页
Acta Aerodynamica Sinica
基金
上海市高等学校青年科学基金
教育部青年教师教学科研奖励基金
上海市重点学科建设项目资助
