STUDY ON FLAME HEIGHT OF MERGED FLAME FROM MULTIPLE FIRE SOURCES
STUDY ON FLAME HEIGHT OF MERGED FLAME FROM MULTIPLE FIRE SOURCES
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DOI：
10.1080/00102200490514949
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发表时间：
2004-12
影响因子：
1.9
通讯作者：
W. Weng;D. Kamikawa;Y. Fukuda;Y. Hasemi;K. Kagiya
中科院分区：
文献类型：
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作者：
W. Weng;D. Kamikawa;Y. Fukuda;Y. Hasemi;K. Kagiya
对多火源融合火焰进行了一系列实验研究。多孔15-cm 2燃烧器用作单元燃烧器，丙烷用作燃料。许多燃烧器具有不同的热释放率被放置在一个正方形的配置与不同的间距。使用视频图像测量火焰高度，使用热电偶测量随高度的温度分布。将美国国家标准与技术研究所的火灾动力学模拟器（FDS）的数值模拟结果与实验数据进行了比较，结果表明FDS能够正确模拟多火源的融合火焰。此外，考虑到分离距离的影响，建立了一个估算融合火焰高度的经验模型。通过与数值模拟结果的比较，验证了该模型的有效性，并发现由该模型计算的融合火焰高度与数值计算结果吻合较好。为了研究融合火焰的细节结构，以3 × 3火源配置为例，定量地给出了融合火焰中氧质量分数分布和速度场，揭示了融合火焰的形成机理.
A series of experiments to study merged flame from multiple fire sources was carried out. The porous 15-cm2 burner was used as a unit burner and propane was employed as a fuel. Many burners with various heat release rates were placed in a square configuration with various separation distances. Flame height was measured using video images and temperature distribution with height was measured using thermocouples. The numerical results from the Fire Dynamics Simulator (FDS) of the National Institute of Standards and Technology was compared with the experimental data, and the comparison results show that FDS correctly simulates the merged flame from multiple fire sources. In addition, an empirical model to estimate the merged flame height was developed considering the effect of separation distance. The validity of this model was confirmed from the comparison with the simulation results, and excellent agreement is found between the calculated merged flame height from the model and the numerical ones. To study the detailed structure of merged flame, 3 × 3 fire source configuration was taken as an example to quantitatively show oxygen mass fraction profiles and velocity fields, which were also given to indicate the formation mechanism of the merged flame.