危险液化气体瞬时泄漏扩散数值模拟研究进展

危险液化气体瞬时泄漏事故是化工工业中重大潜在灾害,急速爆炸会产生急速膨胀的二相蒸气云,因此事故本身既有对化工设备造成的物理爆炸危害,同时也会导致危险介质的扩散。文中概述了化工设备瞬时爆炸事故研究的历程,综述了计算流体力学技术(CFD)在预测液化气体瞬时泄漏事故后果中的应用,指出CFD技术虽然涉及的物理模型非常复杂,计算量较大,但模拟结果可以涵盖流场中包括微观液滴群的大量介质信息,可为节约研究成本和理论发展提供了可靠的研究工具。文中还对事故研究发展和CFD模拟技术应用模式前景提出了展望。

Progress in application of numerical simulation in dangerous liquefied gases instantaneous releases

An accidental instantaneous release can result in potentially disastrous consequences,which has the features of both physical explosion and dangerous heavy gas dispersion.Based on the review of the accidental release research,a comprehensive review of the application of computational fluid dynamics(CFD) technology was presented.Although the calculation cost is high because of the complex physical model,the simulated results can offer the information of the microcosmic droplets in the whole flow field.It is proven by scientists that the CFD model is an economic tool for the academic research of the instantaneous release.The progress for the future development of both the CFD model application and accident research was given.