Temperature variation characteristics of double fuel-pool fire in fan cavity based on software FDS

doi:10.16265/j.cnki.issn1003-3033.2024.01.1803

Abstract

Abstract:

Pool fire caused by fuel leakage seriously threatens engine operation and aircraft safety. To deeply understand the complicated physical mechanisms of pool fire in engine fan cavities, temperature variation characteristics of double fuel pool fire were investigated. Firstly, the physical and numerical models of the CFM56-7B engine fan cavity were established based on the software FDS. Secondly, simulated temperature variations of single fuel pool fire were validated against measurements of the Trent 800 engine fan cavity, and then grid independence was analyzed. Finally, the fire development process and temperature variation characteristics of double fuel pools were analyzed within the fan cavity using several detectors and slices. The results indicated two phases for temperature variation of the double fuel-pool fire in the engine cavity, including an increment state and a quasi-steady state. Moreover, temperature variation magnitude was affected by distances between the detectors and the fuel pools. Fuel-pool fire flame propagation inclined to the left side of the fan cavity, causing an increment of fire temperature on the left side. Plume floating, flame fusion, fusion expansion, and full flame coalescences were observed in the axial direction of the cavity.

Key words: fire dynamic simulator(FDS), fan cavity, double fuel pool fire, temperature variation characteristics, engine

CLC Number:

X949

CHENG Guanbing, YE Haohui. Temperature variation characteristics of double fuel-pool fire in fan cavity based on software FDS[J]. China Safety Science Journal, 2024, 34(1): 133-139.

Figures/Tables 8

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References 21

[1]	李琼, 张华. 航空发动机燃油系统及其附件爆炸大气试验技术研究[J]. 航空发动机, 2017, 43(3):74-77.
	LI Qiong, ZHANG Hua. Research on the explosive atmosphere testing technology of the fuel system and its accessories[J]. Aeroengine, 2017, 43(3):74-77.
[2]	AIRBUS. Statistical analysis of commercial aviation accidents 1958-2021[R], 2022.
[3]	KOTLIAR I. Hypoxic aircraft fire prevention and suppression system with automatic emergency oxygen delivery system:United States, US20080168798A1[P].2008-07-17.
[4]	KIM J, BAEK B, LEE J. Numerical analysis of flow characteristics of fire extinguishing agents in aircraft fire extinguishing systems[J]. Journal of Mechanical Science & Technology, 2009, 23(7):1877-1884.
[5]	杨燕, 寇延清, 杨成茂. 飞机发动机短舱结构防火设计与试验验证[J]. 航空科学技术, 2014, 25(6):58-61.
	YANG Yan, KOU Yanqing, YANG Chengmao. Fire protection design and test verification of aircraft engine nacelle structure[J]. Aeronautical Science and Technology, 2014, 25(6):58-61.
[6]	梁智超, 王井科, 雷友锋. 航空发动机防火安全性设计与验证分析[J]. 航空发动机, 2018, 44(2):92-97.
	LIANG Zhichao, WANG Jingke, LEI Youfeng. Fire safety design and verification analysis of aeroengine[J]. Aeroengine, 2018, 44(2):92-97.
[7]	李仁鹏. 复合材料结构飞机发动机短舱防火设计与试验验证[J]. 广东科技, 2016, 25(2):39-40.
	LI Renpeng. Fire protection design and test verification of composite structure aircraft engine nacelle[J]. Guangdong Science and Technology, 2016, 25(2):39-40.
[8]	崔建军, 任志强, 张宗林. 军用航空发动机防火和耐火试验研究[J]. 航空标准化与质量, 2015(5):36-39.
	CUI Jianjun, REN Zhiqiang, ZHANG Zonglin. Experimental study on fire and fire resistance of military aero engine[J]. Aviation and Quality Standardization, 2015(5):36-39.
[9]	MULLENDER A, HORROCKS D, BINKS D. The numerical simulation and experimental validation of ventilation flow and fire events in a Trent nacelle fire zone[C]. 22^nd International Congress of Aeronautical Sciences, 2000:100-110.
[10]	MOSS J, RUBINI P, SANDERSON V, et al. The simulation of engine casing fires: computational modelling and experiment[C]. NATO RTO Fire and Survivability Specialists Meeting, 2002: 23-26.
[11]	ZADEH S E, BEJI T, MERCI B. Assessement of FDS 6 simulation results for a large scale ethanol pool fire[J]. Combustion Science and Technology, 2016, 188(4):571-580. doi: 10.1080/00102202.2016.1139367
[12]	KEYSER D R, HEWSON J C. Assessment of fire-suppression simulations using full-scale engine nacelle tests[R]. National Institute of Standards and Technology, 2005.
[13]	WANG Zhaozhi, JIA Fuchen, GALEA E, et al. Computational fluid dynamics simulation of a post-crash aircraft fire test[J]. Journal of Aircraft[J], 2013, 50(1):164-175. doi: 10.2514/1.C031845
[14]	李博. 侧向风作用下的双火源相互作用燃烧特性研究[D]. 合肥: 中国科学技术大学, 2021.
	LI Bo. Interaction behaviors of two fire sources burning under cross wind[D]. Hefei: University of Science and Technology of China, 2021.
[15]	徐浩祯, 赵威风, 吕思嘉. 隧道双火源火灾燃烧特性的实验研究[J]. 工程热物理学报, 2020, 41(5):1254-1260.
	XU Haozhen, ZHAO Weifeng, LYU Sijia. Experimental study on combustion characteristics of two fire sources in a tunnel[J]. Journal of Engineering Thermophysics, 2020, 41(5):1254-1260.
[16]	刘松涛, 赵金龙, 卫文彬, 等. 隧道内不同间距双火源火灾实验及模拟研究[J]. 中国公路学报, 2022, 35(7):193-202. doi: 10.19721/j.cnki.1001-7372.2022.07.016
	LIU Songtao, ZHAO Jinlong, WEI Wenbin, et al. Experimental and simulation study on double fire source tunnels with different spacing[J]. China Journal of Highway and Transportation, 2022, 35(7):193-202.
[17]	万华仙. 不同受限条件下双方形对称火源相互作用燃烧行为研究[D]. 合肥: 中国科学技术大学, 2018.
	WAN Huaxian. Interaction of behaviors of two symmetrical square fires under different confined conditions[D]. Hefei: University of Science and Technology of China, 2018.
[18]	邢朝亮, 黄咸家, 何乐, 等. 火焰撞击障碍物形成的溢流火焰融合行为研究[J]. 中国安全科学学报, 2021, 31(4):171-176. doi: 10.16265/j.cnki.issn1003-3033.2021.04.023
	XING Chaoliang, HUANG Xianjia, HE Le, et al. Experimental study on flame merging behavior of spilled flame generated by flame impinging on obstruction[J]. China Safety Science Journal, 2021, 31(4):171-176. doi: 10.16265/j.cnki.issn1003-3033.2021.04.023
[19]	孙玉佳. 基于大涡模拟的油池火焰瞬态辐射传热研究[J]. 中国安全科学学报, 2022, 32(4):65-71. doi: 10.16265/j.cnki.issn1003-3033.2022.04.010
	SUN Yujia. Transient radiative heat transfer of pool fires based on large eddy simulation[J]. China Safety Science Journal, 2022, 32(4):65-71. doi: 10.16265/j.cnki.issn1003-3033.2022.04.010
[20]	詹姆士 G 昆棣瑞. 火灾学基础[M]. 杜建科, 王平, 高亚萍,译. 北京: 化学工业出版社, 2010:323.
	JAMES G Q. Fundamentals of fire phenomena[M]. DU Jianke, WANG Ping, GAO Yaping,Translated. Beijing: Chemical Industry Press, 2010:323.
[21]	MCGRATTAN K, MCDERMOTT R, WEINSCHENK C, et al. Fire dynamics simulator users guide[R]. National Institute of Standards and Technology, 2013.