液化天然气泄漏扩散数学模型分析

Mathematical Model for Dispersion of Liguefied Natural Gas Vapor

液化天然气(LNG)的泄漏扩散已成为安全领域的一个重要研究内容,以LNG蒸气云扩散数学模型的开发进展为对象,详细分析了用于该类型扩散的经验模型、积分模型、浅层模型、拉格朗日非线性烟团模型、计算流体力学(CFD)模型。研究指出:尽管基于Navier-Stokes(N-S)方程的模型在所有模型中性能最好,但用于预测LNG泄漏扩散时,仍有许多值得改进的地方,如要考虑科里奥利力和气象因素等的影响。最后,重点针对当基于N-S方程的CFD模型用于LNG扩散时需要改进的地方进行了展望。

Dispersion of Liquefied Natural Gas （LNG） vapor clouds has been an important research field related with safety. This paper reviews the development of mathematical models for LNG vapor and gives a detailed analysis of empirical model, integral model, shallow layer model, Lagrangian non-linear puff model and computational fluid dynamics model based on Navier-Stokes （N-S） equations, It is shown that the models based on N-S equation enjoy the best performance, but some improvements should be made in order to predict LNG vapor cloud dispersion, among which the influence of Coriolis force and meteorological factors should be considered.