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首页> 外文会议>7th international symposium on heat transfer (ISHT7'08) >SIMULATION OF BOUNDARY-LAYER FLOWS WITH COMBUSTION AT VARIOUS WALL THERMAL CONDITIONS
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SIMULATION OF BOUNDARY-LAYER FLOWS WITH COMBUSTION AT VARIOUS WALL THERMAL CONDITIONS

机译：各种壁热条件下燃烧边界层流动的模拟

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摘要

In the present study, the influence of thermal and diffusion boundary conditions on the structure of laminar diffusion flame in air flows with porous hydrogen blowing was examined. A comparison between the following boundary conditions was attempted: either the porous-surface temperature was assumed to remain lengthwise constant, const TW=const, or the temperature of the fuel supplied through the porous wall was assumed lengthwise uniform, T'=const . The first situation is the case with a liquid fuel injected into flow, for which the evaporating-surface temperature is known to remain constant. With a gaseous fuel injected, the regime with T''=const is ormally encountered. It is shown that the combustion results in a substantial reduction of the wall friction and in a growth of wall heat fluxes. A change in boundary conditions results in a dramatic reconstruction of the boundary-layer flow; it, however, weakly affects the relative laws of friction and heat and mass transfer at laminar flow regime.
机译：在本研究中，研究了热和扩散边界条件对带有多孔氢吹气的气流中层流扩散火焰结构的影响。尝试在以下边界条件之间进行比较：假设多孔表面温度保持纵向恒定，常数TW = const，或假设通过多孔壁供应的燃料温度沿长度方向均匀，T'= const。第一种情况是液体燃料注入流中，已知蒸发表面温度保持恒定。在注入气体燃料的情况下，通常会遇到T''= const的状态。结果表明，燃烧导致壁摩擦的显着降低和壁热通量的增加。边界条件的变化导致边界层流动的显着重建；但是，它对层流状态下的摩擦，热和质量传递的相对定律产生了微弱的影响。

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  • 会议地点 Beijing(CN);Beijing(CN)
  • 作者

    Y.H.Cai; rnD.G Zhao; rnW.Jiang; rnL.D.Chen; rnP.C.Zhai;

  • 作者单位

    State key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China;

    rnState key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China;

    rnState key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China;

    rnState key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China;

    rnDepartment of Engineering Structure and Mechanics,Wuhan University of Technology,Wuhan 430070,China;

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