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NUMERICAL STUDY ON RADIATION HEAT TRANSFER IN DIESEL ENGINE WITH 3D UNSTRUCTURED FINITE VOLUME METHOD

机译:3D非结构化有限体积法的柴油机辐射传热的数值研究

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In this paper, a numerical method based on finite volume method for diesel engine is presented. The production of combustion is assumed to be a grey medium and the scatter of particle is neglected. In this paper the unstructured finite-volume method (UFVM) for radiation has been formulated and implemented in an in-house fluid flow solver GTEA. For its comparison and validation of the present FVM on unstructured grids, a test case with 3D complex geometries is chosen, which was used by S. W. Baek et.al. The results obtained by the presented FVM agree well with the exact solutions. Radiation heat transfer in TBD620 diesel engines is studied with present numerical method. It is shown that the radiation has little effect on average pressure and temperature, but it changes the temperature distribution in cylinder.
机译:本文介绍了一种基于柴油发动机有限体积法的数值方法。假设燃烧的产生是灰色介质,颗粒的散射被忽略。本文在内部流体流动求解器Gtea中配制并实施了用于辐射的非结构化有限体积法(UFVM)。对于对非结构化网格上的本FVM的比较和验证,选择具有3D复杂几何形状的测试用例,由S. W.Baek et.al使用。所呈现的FVM获得的结果与确切的解决方案很好。用现有数值方法研究了TBD620柴油发动机中的辐射传热。结果表明,辐射对平均压力和温度几乎没有影响,但它会改变气缸中的温度分布。

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