Study on spreading characteristics and fire extinguishing efficiency of water mist based on UAV-borne fire extinguishing bombs

doi:10.16265/j.cnki.issn1003-3033.2023.S1.4006

Abstract

Abstract:

In order to verify the feasibility and efficiency of UAV-borne fire extinguishing bombs for extinguishing fire, the structure of UAV-borne fire extinguishing bombs was designed and optimized. The extinguishing fire process of the fire extinguishing bombs was formulated; field tests and full-scale tests of fire extinguishing by UAV-borne fire extinguishing bombs were developed; a high-definition camera was used to record the entire process, including UAV-borne fire extinguishing bomb release, burst, spreading of water mist, and fire extinguishing action; statistical analysis was performed on various parameters, such as spreading area and real burst height, and the influence of different technical parameters on the fire extinguishing efficiency of the fire extinguishing bombs was studied. The results show that: the error in release height of the fire extinguishing bombs is less than 3.5 m, and the error in burst height is less than 2 m; the dispersion intensity distribution of water mist shows a decreasing trend from the center; the spreading area of water mist is positively correlated with the release height but negatively correlated with burst height; the preset technical parameters are a release height of 35 m and a burst height of 8-10 m to achieve the best fire extinguishing efficiency.

Key words: unmanned air vehicle (UAV), fire extinguishing bomb, fire extinguishing efficiency, spreading characteristics, technical parameter

LI Cong, JIN Yanke, XU Wenbo, LI Chengwu, ZOU Biao. Study on spreading characteristics and fire extinguishing efficiency of water mist based on UAV-borne fire extinguishing bombs[J]. China Safety Science Journal, 2023, 33(S1): 185-191.

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灭火弹编号	H	h	投弹高度绝对误差	爆破高度绝对误差
1	50	10	2.85	0.05
2	50	12	1.61	0.42
3	40	2	0.61	0.35
4	40	10	0.98	0.15
5	40	12	1.49	1.26
6	35	0	3.39	0
7	35	5	1.86	0.25
8	35	6	0.32	0.47
9	35	8	0.43	0.83
10	35	8	2.5	0.13
11	35	8	1.06	0.54
12	35	10	0.2	1.94
13	35	10	1.88	1.34
14	35	12	3.31	1.21

灭火弹编号	灭火效果	灭火作用时间/s
6(35-0)	未灭	—
7(35-5)	部分灭火	2.76
9(35-8)	完全灭火	2.77
12(35-10)	完全灭火	2.8
14(35-12)	完全灭火	2.85