本文建立了包含辐射热损失的火焰沿热薄燃料表面传播的数学模型.燃毁点的密度作为待求参数出现在模型中.数值计算结果表明,在微重力环境中,火焰传播速度随空气流动速度的变化出现峰值.对比无辐射热损失模型和有辐射热损失模型的计算结果发现,辐射热损失是形成上述微重力燃烧特征的原因.在静止的微重力环境中或弱空气流动速度下,辐射热损失使燃毁点处有大量的残碳生成,但随着空气流动速度的增大,残碳生成量迅速减小.
参考文献
[1] | S. Bhattacharjee;R. A. Altenkirch;K. Sacksteder .The effect of ambient pressure on flame spread over thin cellulosic fuel in a quiescent, microgravity environment[J].Journal of heat transfer: Transactions of the ASME,1996(1):181-190. |
[2] | Rogg B;Wang W.RUN-1DL,The Laminar Flame and Flamdet Code[M].User Manual,1995 |
[3] | NASA TM 106858.Microgravity Combustion Science:1995 program Update[Z].,1995. |
[4] | S L OLSON .Mechanism of Microgravity Flame Spread over a Thin Solid Fuel:Oxygen and Opposed Flow Effects[J].Combustion Science and Technology,1991,76:233-249. |
[5] | S Bhattacharjee.R A Altenkirch.Radiation-Controlled,Opposed-Flow Flame Spread in a Microgravity Environment[A].The Combustion Institute,1990 |
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