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首页> 外文期刊>International Journal of Heat and Mass Transfer >A microscale combustor recuperator and oil heat exchanger - design and thermofluidic characterization
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A microscale combustor recuperator and oil heat exchanger - design and thermofluidic characterization

机译：微型燃烧室换热器和油热交换器-设计和热流体特性

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A two-dimensional numerical model of an integrated microscale hydrogen-air catalytic combustor, recuperator, and oil heat exchanger is presented. Catalytic combustion occurs on the walls of the microchan-nel in the presence of a platinum catalyst. The performance of the combustor is documented using validated CFD simulations for variations in geometric and fiuidic parameters. Varied geometric parameters include the length and location of the catalyst bed, length of the device, and the height of the combustion channel. Varied fiuidic parameters include the oil inlet temperature, flow rates of oil and reactants, and the equivalence ratio of the reactants. Performance is characterized using a global efficiency, heat transfer effectiveness and hydrogen conversion. The parametric variations are captured non-dimensionally as variations in Damkohler and Peclet numbers, which are in turn used to describe the changes in hydrogen conversion and efficiency. Performance maps for hydrogen conversion and pressure drop in the combustion channel are presented based on values of the Damkohler and Peclet numbers and regions of desired operability of the combustor are identified.
机译：提出了集成的微型氢气-空气催化燃烧器，换热器和油热交换器的二维数值模型。在铂催化剂的存在下，催化燃烧发生在微通道的壁上。使用经过验证的CFD仿真记录燃烧室的性能，以了解几何参数和流体参数的变化。各种几何参数包括催化剂床的长度和位置，装置的长度以及燃烧通道的高度。各种流体参数包括进油温度，机油和反应物的流速以及反应物的当量比。性能通过整体效率，传热效率和氢转化来表征。参数变化作为Damkohler和Peclet数的变化无量纲地捕获，这些变化又用来描述氢转化率和效率的变化。基于Damkohler和Peclet数的值，给出了燃烧通道中氢气转化和压降的性能图，并确定了燃烧室所需的可操作性区域。

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