Evaluation of Radiative Heat Transfer Effecton Fire Whirlwind

Evaluation of Radiative Heat Transfer Effecton Fire Whirlwind
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火旋风辐射传热效应评价

DOI:
10.3850/s201042861300007x
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发表时间:
2013
期刊:
--
影响因子:
--
通讯作者:
S. Sakai
S. Sakai
中科院分区:
--
文献类型:
--
作者:
S. Sakai

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在考虑参与介质的情况下,采用射线发射模型(REM2)的辐射单元法对火焰旋风的辐射对流换热进行了分析,并采用引入气体介质辐射热流散度的有限体积法进行了三维分析,对热场和流场进行了研究。离散后的方程采用SIMPLE方法求解。自然对流是由平坦地面上的恒温平面源引起的。火旋风从四角引入气流,在热源上方稳定地产生强风。在分析中,将热源上方的一维辐射交换分析与三维辐射交换分析进行了比较,以减少计算量和时间。然后,改变参与气体的组成,讨论辐射换热对旋风流场的影响。
Radiative-convective heat transfer analysis with respect to fire whirlwind is performed in consideration of participating media using Radiation Element Method by Ray Emission Model (REM2), in which three dimensional analyses are then performed to investigate the thermal and flow fields by using the Finite Volume Method with introducing divergence of radiative heat flux for gas medium. The SIMPLE method is utilized to solve the discretized equations. Natural convection is caused from a plane source of constant temperature in the flat ground. Fire whirlwind is forcely generated stably just above the heat source with introducing air currents from four corners. In the analysis, one dimensional radiative exchange analysis above the heat source is compared with three dimensional one to reduce the computational load and time. Then, the composition of participating gases is altered to discuss the effect of radiative heat exchange to the whirlwind flow field.
DOI: 10.1016/j.soildyn.2011.06.001
发表时间: 2011-11-01
影响因子: 4
作者:
Takewaki, I.;Murakami, S.;Tsuji, M.
通讯作者: Tsuji, M.
DOI: --
发表时间: 2007
期刊: Proceedings of FEDSM2007
影响因子: --
作者:
飯田哲也;榎本啓士;稗田 登;今井有希子;原 人志;S. Sakai;Seigo Sakai
通讯作者: Seigo Sakai