This study presents a numerical model to analyze the sudden failure of compressed natural gas (CNG) cylinder onboard a CNG vehicle. The model is developed using COMSOL. It accounts for the real gas effects, physical energy, and combustion of the flammable gas. The model is tested using experimental data.

The study highlight compression energy as one of the serious concern. An unintentional rupture of a compressed cylinder filled with natural gas would generate a rapid energy release in the form of the pressure energy (blast). The release of energy and gas would cause rapid mixing and generate overpressure and may also cause flash fire. A detailed failure frequency analysis is also done to analyze the effectiveness of barriers. This study identifies critical points for the safe operation of the CNG system onboard a vehicle.

这项研究提出了一个数值模型来分析CNG车辆上压缩天然气（CNG）气瓶的突然失效。该模型是使用COMSOL开发的。它考虑了实际的气体效应，物理能和可燃气体的燃烧。使用实验数据测试模型。

这项研究强调压缩能量是人们最关注的问题之一。充满天然气的压缩气缸意外破裂会产生压力能（爆炸）形式的快速能量释放。能量和气体的释放会导致快速混合并产生超压，还可能引起闪燃。还进行了详细的故障频率分析，以分析障碍物的有效性。这项研究确定了车辆上CNG系统安全运行的关键点。