Pore-scale study of flame propagation and thermal characteristics in randomly packed beds
Pore-scale study of flame propagation and thermal characteristics in randomly packed beds
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随机填充床中火焰传播和热特性的孔隙尺度研究
DOI：
10.1016/j.applthermaleng.2020.115894
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发表时间：
2020-11
影响因子：
6.4
通讯作者：
Wang Ping
中科院分区：
文献类型：
--
作者：
Jiang Linsong;Suo Shaoyi;Wang Ping
应用离散元软件LIGGGHTS模拟了球团矿在重力作用下的堆积过程。得到了与实际堆积结构相似的三维几何模型。基于三维几何模型，采用大涡模拟(LES)方法结合幂函数火焰褶皱模型，对密闭空间内氢气-空气预混燃烧进行了数值模拟。此外，通过将仿真结果与实验数据进行对比，验证了模型的有效性。结果表明，高温区在多孔结构中的膨胀速度高于非多孔结构中的膨胀速度。在点火初期，由于温差太大，多孔介质结构可以有效地加宽温度过渡区，减小温度梯度，使温度场更加均匀。根据火焰面上的卡洛维茨数分布，定量分析了多孔结构中湍流与火焰的相互作用，建立了不同工况下湍流火焰的分区规律。
The discrete element software LIGGGHTS is applied to reproduce the packing process of pellets under gravity. A 3-D geometric model is obtained which is similar to the actual packed structure. Based on the 3-D geometric model, a Large-eddy simulation (LES) method combined with the power-law flame wrinkling model is utilized to simulate the hydrogen-air premixed combustion in enclosed space. In addition, the validity of the model is verified by comparing the simulation results with the experimental data. It shows that the expansion velocity of high-temperature region in the porous structure is higher than that in the non-porous structure. At the initial ignition stage, as the difference of temperature is too large, the temperature transition zone can be widened effectively by the porous media structure, and the temperature gradient is reduced leading to a more uniform temperature field. According to the distribution of Karlovitz number on the flame surface, the quantitative analysis of turbulence-flame interaction in the porous structures is carried out, and the zoning law of turbulent flame under various operating conditions is established.
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影响因子：
6.4
作者：
Yang Weijuan;Zhou Mingyue;Deng Chen;Huang Tiao;Zhou Junhu;Wang Zhihua;Liu Jianzhong;Cen Kefa
通讯作者：
Cen Kefa
影响因子：
3.2
作者：
Li Yang;Fang Liu;Zhengchang Song;Kunlei Liu;Kozo Saito
通讯作者：
Li Yang;Fang Liu;Zhengchang Song;Kunlei Liu;Kozo Saito
影响因子：
5.2
作者：
Jiang Linsong;L. Hongsheng;Suo Shaoyi;Xie Mao-zhao;Wu Dan;Bai Minli
通讯作者：
Jiang Linsong;L. Hongsheng;Suo Shaoyi;Xie Mao-zhao;Wu Dan;Bai Minli
影响因子：
4.4
作者：
D. Michaels;A. Ghoniem
通讯作者：
D. Michaels;A. Ghoniem
循环流化床反应器中油页岩干馏固体废物与玉米秸秆颗粒共燃烧三维数值模拟
影响因子：
6.4
作者：
Liu, Hongpeng;Li, Jiawei;Wang, Qing
通讯作者：
Wang, Qing