特种车辆发动机动力舱灭火仿真技术研究

doi:10.16182/j.issn1004731x.joss.24-0237

摘要/Abstract

摘要：

针对动力舱着火后灭火系统的探测响应时间测定和灭火能力评估这一难点，基于湍流模型，对火灾产生后蔓延和灭火过程中Halon灭火剂扩散过程进行数值建模，对车辆动力舱角落以及中部两处位置的火灾发展及灭火过程进行模拟，采集不同环境下火灾发生和灭火过程中的温度变化，得到火灾探测响应时间和灭火时间，并结合实车试验数据进行置信度分析。结果表明：选取的动力舱角落和中部2个试验测点的仿真置信度分别为91.56%及95.08%，验证了数值模型用来仿真火灾发展和灭火过程的有效性及准确性，为灭火系统设计提供技术支撑。

关键词: 动力舱, 灭火仿真, 数值建模, 效能评估, 置信度分析

Abstract:

In view of the difficulty of measuring the detection response time and evaluating fire extinguishing abilities of the fire extinguishing system after a fire accident in the engine compartment, the turbulence model was adopted, and numerical modeling of the fire propagation and the diffusion process of Halon fire extinguishing agent during the firefighting process was carried out. The development of fire and the fire extinguishing process at the corner and the middle position of the vehicle compartment was simulated, and the temperature changes during the occurrence and extinguishing of fires in different environments were collected, so as to obtain fire detection response time and extinguishing time. Moreover, confidence analysis was carried out based on the data of real vehicle tests. The results show that the simulation confidence of the two test points (one at the corner and the other in the middle) of the vehicle compartment is 91.56% and 95.08%, respectively. This verifies the effectiveness and accuracy of the numerical model in simulating the fire development and extinguishing process and provides technical support for the design of the fire extinguishing system.

Key words: engine compartment, fire extinguishing simulation, numerical modeling, effectiveness evaluation, confidence analysis

中图分类号:

TP391.9

牛建民,钟岳,徐峰等 . 特种车辆发动机动力舱灭火仿真技术研究[J]. 系统仿真学报, 2025, 37(8): 2030-2042.

Niu Jianmin,Zhong Yue,Xu Feng,et al . Research on Simulation Technology of Fire Extinguishing in Engine Compartment of Special Vehicle[J]. Journal of System Simulation, 2025, 37(8): 2030-2042.

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工况	探测响应时间	灭火时间	总时长
常温常压，火源在舱室角落	12.83	12.01	24.84
常温常压，火源在舱室中部	15.19	0.79	15.98
低温低湿，火源在舱室角落	12.55	24.52	37.07
低温低湿，火源在舱室中部	18.05	24.71	42.76
低温低压，火源在舱室角落	9.91	6.64	16.55
低温低压，火源在舱室中部	13.42	0.65	14.07
高温高湿，火源在舱室角落	12.48	11.71	24.19
高温高湿，火源在舱室中部	14.62	0.73	15.35