高速路上LPG罐车泄漏爆炸危险性分析

Risk analysis of explosion from leaking LPG tankers on highway

在泄漏速度为20、30、50 m/s,环境温度为10、20、30、40℃,地面粗糙度为0.55、0.65、0.71 mm的条件下,利用FLUENT软件进行模拟仿真计算。得到LPG罐车发生泄漏时LPG浓度分布情况,结合LPG火灾爆炸极限,分析泄漏扩散所涉及区域内可能爆炸的范围。研究结果表明,泄漏速度越快,云团扩散速率增大,云团扩散范围越广,爆炸危险性区域增大。风速越大,增大了云团扩散速率,泄漏扩散范围增大,爆炸危险性区域减小。地面粗糙度越大,减缓了云团扩散速率,云团扩散范围减小,爆炸危险性区域增大。

The simulation was carried out using FLUENT software under the conditions of 20,30 and 50 m/s leakage velocity,10,20,30 and 40°C ambient temperature and 0.55,0.65 and 0.71 mm ground roughness.The distribution of LPG concentration in LPG tankers with leaks was obtained,and the range of possible explosion areas in the area in volved in the spreading of leaks was analysed in conjunction with the LPG fire explosion limit.The results show that the faster the leak rate,the higher the cloud spreading rate and the wider the cloud spreading area,the higher the ex plosion risk area.The higher the wind speed,the higher the cloud spreading rate,the greater the spread of the leak and the lower the explosion risk area.The rougher the ground,the slower the cloud spreading rate,the less the cloud spreading area and the greater the explosion hazard area.