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首页> 外文期刊>International Journal of Heat and Mass Transfer >Numerical investigation of filtration gas combustion in a mesoscale combustor filled with inert fibrous porous medium
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Numerical investigation of filtration gas combustion in a mesoscale combustor filled with inert fibrous porous medium

机译：填充有惰性纤维多孔介质的中尺度燃烧室中过滤气体燃烧的数值研究

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摘要

Filtration gas combustion in a mesoscale combustor filled with inert fibrous porous media was numerically investigated. Downstream propagating combustion wave and standing combustion wave were obtained in the simulation. The predicted flame stability diagram agrees well with experimental results in the literature. Moreover, it was found that the downstream propagating flame changes its shape and transforms from one stable state to another stable state in a short duration after ignition, while the flame shape of the standing wave remains unchanged. Furthermore, combustion efficiency of both combustion waves increases with time and a nearly complete conversion can be achieved spontaneously due to the strong heat recuperation. It is also demonstrated that heat conduction in the tube wall has a crucial effect on flame behaviors and combustion efficiency. On one hand, for a bigger wall thermal conductivity, the downstream propagating wave moves with a larger speed; on the other hand, a high combustion efficiency can be expected for a smaller thermal conductivity.
机译：数值研究了填充有惰性纤维多孔介质的中尺度燃烧室中的过滤气体燃烧。在模拟中获得了下游传播燃烧波和驻波燃烧波。预测的火焰稳定性图与文献中的实验结果非常吻合。此外，发现下游传播火焰在点火后的短时间内改变其形状并从一种稳定状态转变为另一种稳定状态，而驻波的火焰形状保持不变。此外，两个燃烧波的燃烧效率都随时间增加，并且由于强大的换热能力，可以自发实现近乎完全的转换。还证明了管壁中的热传导对火焰行为和燃烧效率具有至关重要的影响。一方面，对于较大的壁热导率，下游传播波以较大的速度运动；另一方面，对于较大的壁导热率，下游的传播波以较大的速度运动。另一方面，对于较小的热导率可以期望高燃烧效率。

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  • 来源
  • 作者

    Yi Liu; Aiwu Fan; Hong Yao; Wei Liu;

  • 作者单位

    State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China;

    State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China;

    State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China;

    State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Mesoscale combustor; Filtration gas combustion; Fibrous porous media; Flame instability; Standing wave;

    机译：中尺度燃烧室;过滤气体燃烧;纤维状多孔介质;火焰不稳定;驻波;

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