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首页> 外文期刊>Combustion Science and Technology >EFFECT OF GRAVITY FIELD AND PRESSURE DIFFERENCE ON HETEROGENEOUS COMBUSTION IN POROUS MEDIA
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EFFECT OF GRAVITY FIELD AND PRESSURE DIFFERENCE ON HETEROGENEOUS COMBUSTION IN POROUS MEDIA

机译：重力场和压力差对多孔介质非均质燃烧的影响

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摘要

Gravity is known to affect heterogeneous combustion in porous media; it is especially appreciable at very low air (oxidizer)flow rates. Effect of gravity on the combustion of porous objects includes not only the force of gravity (gravity field inside the porous object), but also the pressure difference at boundaries of the porous object, which is caused by the action of gravity on the ambient air if the open borders of the object are located at different heights. In this work, it has been studied numerically how the gravity field inside the porous object and the above-mentioned pressure difference at the object boundaries affect the combustion process in the object. It is revealed that the gravity field inside the porous object and the pressure difference at object boundaries lead to opposite effects: the pressure difference on object borders leads to the propagation of the combustion wave in the same direction and the same mode as in the vertical porous object, but the gravity field leads to the spread of the wave in the opposite direction or in a different mode. In the vertical porous object the pressure difference at object boundaries defeats the effect of gravity field inside the porous object, but the gravity force leads to reducing the velocity of combustion wave.
机译：众所周知，重力会影响多孔介质中的异质燃烧。在极低的空气（氧化剂）流量下尤其明显。重力对多孔物体燃烧的影响不仅包括重力（多孔物体内部的重力场），还包括多孔物体边界处的压力差，这是由重力对周围空气的作用引起的。对象的开放边界位于不同的高度。在这项工作中，已经对多孔物体内部的重力场和物体边界处的上述压力差如何影响物体的燃烧过程进行了数值研究。结果表明，多孔物体内部的重力场和物体边界处的压力差产生相反的作用：物体边界上的压力差导致燃烧波沿与垂直多孔体相同的方向和模式传播。物体，但重力场导致波向相反方向或以不同模式传播。在垂直多孔物体中，物体边界处的压力差克服了多孔物体内部的重力场效应，但是重力导致燃烧波速度降低。

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  • 来源
    《Combustion Science and Technology》 |2014年第12期|1410-1421|共12页
  • 作者

    Nickolay A. Lutsenko; Vladimir A. Levin;

  • 作者单位

    Institute of Automation and Control Processes, Far Eastern Branch of the RAS, 5 Radio Str., Vladivostok 690041, Russia,Far Eastern Federal University, Vladivostok, Russia;

    Institute of Automation and Control Processes, Far Eastern Branch of the RAS, Vladivostok, Russia,Far Eastern Federal University, Vladivostok, Russia,Institute of Mechanics of the Moscow State University, Moscow, Russia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Filtration combustion; Numerical modeling; Porous media;

    机译：过滤燃烧;数值建模;多孔介质;

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