车载高压氢瓶火烧试验及不同充装介质数值比较研究

Bonfire Test and Different Filling Mediums Numerical Comparison Research of High-Pressure Hydrogen Storage Cylinders for Vehicle

目前我国尚无车载氢瓶火烧试验标准。当气瓶充装介质为氢气进行火烧试验时,因氢气易燃易爆的特殊性而使得试验具有巨大的危险。今通过火烧试验,得到了过程中氢瓶温度以及压力变化数据,以此为基础建立了燃烧场数值仿真模型,用于模拟气瓶内部充装介质分别为氢气和空气时温度和压力的变化。模拟与试验结果比较表明:所建模型能较为准确地预测气瓶内部温度、压力的变化规律,压升过程中空气与氢气的变化规律基本类似,可为确定车载氢燃料气瓶的火烧试验方法以及控制参数提供技术支撑。

At present, there is no bonfire test standard of high-pressure hydrogen storage cylinders for vehicles in China. The bonfire test of cylinders filled with hydrogen medium may cause serious accident because of the hydrogen＇s particularity of flammability and explosiveness. The temperature and pressure variation data of the cylinder during bonfire test were obtained by the experiments of bonfire tests. Then the numerical model was built to simulate the real combustion of the bonfire test. By the heat transfer calculation, the temperature and pressure rising process of the hydrogen and air in the cylinder were simulated separately. The comparison of the experimental bonfire test results and the simulation results indicates that the model could accurately predict the variation rules of the temperature and pressure in the cylinder, and the pressure variation rule of air and hydrogen gas are similar. This study provides the technical support to determine the optimal control parameters for the bonfire test of hydrogen storage cylinder for vehicles.