基于Fluent的四氟乙烯爆炸数值模拟

Numerical simulation of tetrafluoroethylene explosion based on Fluent

通过Fluent软件建立了四氟乙烯爆炸模型,数值模拟了直径为70 mm、高度为500 mm的圆柱形反应器内四氟乙烯的爆炸状况,分析了反应器内四氟乙烯爆炸时的温度和压力变化规律,并揭示了四氟乙烯爆炸火焰与压力波的特性.模拟结果表明:在四氟乙烯点火发生后20 ms内,反应器内监控点的压力与温度升高速度均较快,之后压力和温度数值平缓升高,温度最大值为2 000 K,压力最大值为608.000 kPa;数值模拟结果与文献中的试验结果吻合较好,验证了所建立的四氟乙烯爆炸模型具有一定的可靠性.研究结果可为氟化工四氟乙烯爆炸后果预测提供技术指导.

The tetrafluoroethylene explosion model was established by Fluent software, and the tetrafluoroethylene explosion in a cylindrical reactor with diameter of 70 mm and height of 500 mm was numerically simulated. The changes of temperature and pressure in the reactor were analyzed, and the flame and pressure wave characteristics of the explosion field were revealed. The results show that within 20 ms after the ignition of tetrafluoroethylene, the pressure and temperature of the monitoring point in the reactor rise rapidly, and then the values rise gently with the maximum temperature of 2 000 K and the maximum pressure of 608.000 kPa. The simulation results are consistent with the experimental results in the literature, which can verify the reliability of the tetrafluoroethylene explosion model. The research results can provide technical support for predicting the consequences of fluorine chemical tetrafluoroethylene explosion.