在分析汽车4S店火灾事故危险性的基础上,对某4S店停车库火灾及烟气蔓延进行数值分析,明确着火车辆引燃相邻及上方车辆的临界热释放速率.设计3种火灾场景,模拟不同火灾场景下火场温度、烟气等对车辆的影响.结果表明,为避免火灾在相邻车辆之间蔓延,上下相邻停车单元应该用防火隔离措施;相对停车单元间距要满足防火间距的要求.提出大型4S店火灾防范策略,以期为4S店火灾防范提供参考.%Based on the analysis of the risk of fire accident in 4S stores,a numerical analysis of fire and smoke spread of parking lot fire in a 4S store was made,the critical heat release rate of burning fire igniting the adjacent and above vehicles was identified. Mean-while, three fire scenarios were set to simulate the influence of temperature and smoke on vehicles.The results showed that to av-iod the fire spread between adjacent vehicles, fire compartment method should be adopted between the upper and lower parking units; the distance between the opposite parking units should meet the requirements of codes. Based on this, fire prevention strategy of large 4S stores is proposed,in order to provide reference for the 4S store fire prevention.
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