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首页> 外文期刊>International journal of numerical methods for heat & fluid flow >Internal flow analysis of a porous burner via CFD
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Internal flow analysis of a porous burner via CFD

机译：通过CFD分析多孔燃烧器的内部流

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Purpose This study aims to introduce a metal porous burner design. Literature is surveyed in a comprehensive manner to relate the current design with ongoing research. A demonstrative computational fluid dynamics (CFD) analysis is presented with projected flow conditions by means of a common commercial CFD code and turbulence model to show the flow-related features of the proposed burner. The porous metal burner has a novel design, and it is not commercially available. Design/methodology/approach Based on the field experience about porous burners, a metal, cylindrical, two-staged, homogenous porous burner was designed. Literature was surveyed to lay out research aspects for the porous burners and porous media. Three dimensional solid computer model of the burner was created. The flow domain was extracted from the solid model to use in CFD analysis. A commercial computational fluid dynamics code was utilized to analyze the flow domain. Projected flow conditions for the burner were applied to the CFD code. Results were evaluated in terms of homogenous flow distribution at the outer surface and flow mixing. Quantitative results are gathered and are presented in the present report by means of contour maps. Findings There aren't any flow sourced anomalies in the flow domain which would cause an inefficient combustion for the application. An accumulation of gas is evident around the top flange of the burner leading to higher static pressure. Generally, very low pressure drop throughout the proposed burner geometry is found which is regarded as an advantage for burners. About 0.63 Pa static pressure increase is realized on the flange surface due to the accumulation of the gas. The passage between inner and outer volumes has a high impact on the total pressure and leads to about 0.5 Pa pressure drop. About 0.03 J/kg turbulent kinetic energy can be viewed as the highest amount. Together with the increase in total enthalpy, total amount of energy drawn from the flow is 0.05 J/kg. More than half of it spent through turbulence and remaining is dissipated as heat. Outflow from burner surface can be regarded homogenous though the top part has slightly higher outflow. This can be changed by gradually increasing pore sizes toward inlet direction.Originality/value Conducted analysis is for a novel burner design. There are opportunities both for scientific and commercial fields.
机译：目的本研究旨在介绍一种金属多孔燃烧器设计。对文学进行了全面的调查，以使当前的设计与正在进行的研究相关联。通过通用的商用CFD代码和湍流模型，以预估的流动条件进行了演示性计算流体动力学（CFD）分析，以显示拟议燃烧器的与流动相关的特征。多孔金属燃烧器具有新颖的设计，并且不能在市场上买到。设计/方法/方法基于多孔燃烧器的现场经验，设计了金属的圆柱形两级均质多孔燃烧器。文献被调查以列出多孔燃烧器和多孔介质的研究方面。创建了燃烧器的三维实体计算机模型。从实体模型中提取了流域，以用于CFD分析。商业计算流体动力学代码被用来分析流域。将燃烧器的预计流量条件应用于CFD代码。根据外表面的均匀流动分布和流动混合来评估结果。收集了定量结果，并通过等高线图显示在本报告中。结果在流域中没有任何源于流动的异常会导致应用的低效燃烧。燃烧器顶部法兰周围明显积聚了气体，导致更高的静压。通常，发现在所提出的燃烧器的整个几何形状中压降非常低，这被认为对燃烧器是有利的。由于气体的积累，在法兰表面实现了约0.63 Pa的静压增加。内部和外部体积之间的通道对总压力有很大影响，并导致约0.5 Pa的压降。大约0.03 J / kg的湍动能可以看作是最大量。加上总焓的增加，从流中吸收的总能量为0.05 J / kg。其中一半以上是通过湍流度过的，其余部分则通过热量消散。尽管顶部的流出量略高，但可以认为燃烧器表面的流出量是均匀的。可以通过朝入口方向逐渐增加孔径来改变。原始数据/值进行的分析是针对一种新颖的燃烧器设计。科学和商业领域都有机会。

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