围堰对LNG储罐泄漏扩散规律影响研究

Research on Influences of Dike Dam on the Law of LNG Release and Dispersion

利用流体力学软件FLUENT对围堰存在情况下的LNG储罐泄漏扩散进行了数值模拟,并对不同围堰尺寸和不同储罐容积条件下泄漏扩散的气云形态变化和爆炸范围进行了对比。结果表明,围堰可以有效地阻止气云的扩散,使气云聚集在围堰内侧;随着围堰长度的减小,对LNG储罐泄漏扩散阻挡作用越来越明显;围堰对大型LNG储罐泄漏扩散的阻挡较小型储罐更加明显。研究结果对指导LNG安全储运、使用及事故后果控制具有重要意义。

The paper used the Fluent package and based on CFD modeling technique to study the law of LNG release and dispersion,and then simulated effects of size of dike dam and tank value on shape of the LNG dense gas and range of explosion.It showed that the dike dam can prevent the LNG dense gas by the inside,and shorter the dike dam can prevent more LNG dense gas than the longer dike dam.The research also discovered that the influence of dike dam on larger LNG tank is clearer than that on smaller LNG tank.The research can provide scientific guidelines for site of LNG receiving terminals,establishment of emergency response plan,delimitation of exclusion zones and evaluation and claims of hazard suffered from accidence.