无通风直升机动力舱火灾温度场数值模拟
Numerical simulation study on temperature field of helicopter nacelle fire under non-ventilation condition
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摘要: 采用大涡模拟(LES)技术,针对某型直升机动力舱建立了火灾模型,选择油池火灾作为研究对象,并对火灾场景进行了设计.利用数值模拟的方法研究了不同位置火源动力舱的火灾场,分析了火源位置对火灾热释放速率、速度场和温度场的影响.结果表明:无通风条件下,火源位置的改变影响动力舱火灾的蔓延,并且当火源位于动力舱底部距前防火墙1/4处时,火灾强度较大,对舱内部件的破坏较为严重.因此,在防火设计中应重点对该部位火灾区域进行防范.研究结果可为动力舱灭火系统设计提供参考.Abstract: The model of fire was established for nacelle of helicopter using large eddy simulation (LES) technology.Taking oil pool fire as an investigation object,the fire scene was designed.Different ignition positions of nacelle fire were studied by simulation method.And the influences of ignition positions on heat release rate,velocity field and temperature field under non-ventilation condition were analyzed.The results show that it has a significant effect on fire propagation in nacelle when the ignition positions are changed.Meanwhile,serious damage of components occurs at the bottom of nacelle in 1/4 position due to strong fire.So,more attention shall be paid to the fire protection design.The conclusion provides a reference for design of fire protection in nacelle.
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Key words:
- helicopter /
- non-ventilation /
- fire /
- oil pool fire /
- temperature field /
- numerical simulation
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[1] 陈国庆,陆守香,庄磊,等.船舶机舱油料火灾的发展过程研究[J].中国科学技术大学学报,2006,36(1):91-95. CHEN Guoqing,LU Shouxiang,ZHUANG Lei,et al.Fire development processes in machine rooms[J].Journal of University of Science and Technology of China,2006,36(1):91-95.(in Chinese) [2] Kim H J,Lilley D G.Models of fire development:a review.AIAA 2000-0594,2000. [3] 梁强, 魏东.双层岛式地铁车站火灾烟气蔓延数值模拟与分析[J].热科学与技术,2008,7(2):161-166. LIANG Qiang,WEI Dong.Simulation of smoke spread in fire at island-platform of double decked subway station[J].Journal of Thermal Science and Technology,2008,7(2):161-166.(in Chinese) [4] Klueg E P,Demaree J E.An investigation of in-flight fire protection with a turbofan powerplant installation.Atlantic City,New Jersey:Final Report,Report No.NA-69-26,National Aviation Facilities Experimental Center, 1969. [5] Donaghy K,Riordan D,Raghunathan S.Investigation of fire propagation within zone one of an engine nacelle.AIAA 1999-0236,1999. [6] Wen J X,Kang K,Donchev T,et al.Validation of FDS for the prediction of medium-scale pool fires[J].Fire Safety Journal,2006,42(2):127-138. [7] Disimile P J,Toy N,Bai X,et al.Experimental investigation of hot surface ignition for transportation survivablity.AIAA 2005-2334,2005. [8] Black A R,Suo-Anttila J M,Disimile P J,et al.Numerical predictions and experimental results of air flow in a smooth quarter-scale nacelle.AIAA 2002-0856,2002. [9] Nicolette V F,Tieszen S R,Gritzo L A,et al.Numerical simulation of fire in an aircraft engine nacelle[M].Gaithersburg,MD:National Institute of Standards and Technology,1996:143-144. [10] 李淑艳,王新月,卿雄杰.飞机/发动机灭火系统的设计与计算[J].西北工业大学学报,2006,24(1):124-127. LI Shuyan,WANG Xinyue,QING Xiongjie.An engineering method for extinguishing incipient aircraft/engine fire[J].Journal of Northwestern Polytechnical University,2006,24(1):124-127.(in Chinese) [11] McGrattan K B,Hostikka S,Floyd J,et al.Fire dynamics simulator technical reference guide Volume 1:mathematical model[M].5th ed.Gaithersburg,MD:NIST Special Publication 1018-5,National Institute of Standards and Technology,2009. [12] 范维澄,孙金华,陆守香,等.火灾风险评估方法学[M].北京:科学出版社,2004. [13] Quintiere J G,Karlsson B.Enclosure fire dynamics[M].Washington,DC:CRC Press,1999. [14] 庄磊,陆守香,孙志友,等.航空煤油池火焰高度特征研究[J].中国科学技术大学学报,2009,39(7):763-768. ZHUANG Lei,LU Shouxiang,SUN Zhiyou,et al.Study of flame height of aviation fuel pool fires[J].Journal of University of Science and Technology of China,2009,39(7):763-768.(in Chinese) [15] Holen J,Bronstrom M,Magnussen B F.Finite difference calculation of pool fires[J].Symposium (International) on Combustion,1991,23(1):1677-1683. [16] 王亮,苏石川,聂宇宏,等.船舶机舱火灾中回燃现象的数值计算与分析[J].船舶科学技术,2009,31(6):63-66. WANG Liang,SU Shichuan,NIE Yuhong,et al.Numerical simulation and analysis of th backdraft phenomenon in ship engine-room fire[J].Ship Science and Technology,2009,31(6):63-66.(in Chinese)
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