不同初始质量小尺度松木燃烧特性实验研究
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X932

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国家重点研发计划(2021YFF0600403);国网通用航空有限公司科技项目(1100/2021-44003B),中央高校基本科研业务经费优秀青年教师项目(2022YQAQ05)


Experimental study on the combustion characteristics of small-scale pine wood with different initial masses
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    摘要:

    近年来,世界范围内森林火灾事故频发,造成了极大的人员伤亡和财产损失。目前对于木材堆垛燃烧特征的理论及模型研究较为缺乏。本文以典型松木材料为对象,开展了不同初始质量的小尺度松木燃烧特性实验,研究了松木的质量损失速率、火焰温度等燃烧特征。结果表明:松木的剩余质量和质量损失速率都呈现“缓慢下降—迅速降低—逐渐平缓”的趋势;在松木燃烧初期,相同时间内松木质量和损失速率呈反比;在松木燃烧中后期,松木质量和质量损失速率呈正比关系;松木燃烧初期的热释放速率增长趋势为t2火的定量数学模型;同一工况下热电偶到火源距离与热电偶的温度峰值和波动程度呈反比,且温度峰值的出现时间和波动程度大致相同。

    Abstract:

    In recent years, the forest fire disasters occur frequently, and cause great casualties and property losses. At present, there is a lack of research on the theoretical and model research of combustion characteristics of wood. In this paper, the typical pine wood was used as the as experimental material, the small-scale combustion experiments with different initial masses were carried out, and the combustion characteristic including mass loss rate and flame temperature were investigated. The results show that both the residual mass and the mass loss rate presented the trend of “decline slowly-decrease rapidly-stable gradually”. In the initial stage of pine combustion, the mass and mass loss rate of pine were inversely proportional. In the later stage of pine combustion, the mass was proportional to the mass loss rate. The growth trend of the heat-release rate at the initial stage conformed to the quantitative t2 model. The peak value and fluctuation degree of flame temperature were inversely proportional to the distance from the thermocouple to the fire source at the same condition, and the occurrence time of the temperature peak had the same trend with temperature fluctuation.

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彭然,郭玉辉,李聪. 不同初始质量小尺度松木燃烧特性实验研究[J]. 科学技术与工程, 2023, 23(15): 6693-6699.
Peng Ran, Guo Yuhui, Li Cong. Experimental study on the combustion characteristics of small-scale pine wood with different initial masses[J]. Science Technology and Engineering,2023,23(15):6693-6699.

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  • 收稿日期:2022-07-08
  • 最后修改日期:2022-10-24
  • 录用日期:2022-11-24
  • 在线发布日期: 2023-06-05
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