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首页> 外文期刊>International Journal of Heat and Mass Transfer >Experimental Investigation For Effects Of A Reciprocating Motion On Mixed Convection Of A Curved Vertical Cooling Channel With A Heat Top Surface
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Experimental Investigation For Effects Of A Reciprocating Motion On Mixed Convection Of A Curved Vertical Cooling Channel With A Heat Top Surface

机译：往复运动对带有热顶面的弯曲垂直冷却通道混合对流影响的实验研究

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The prediction of the auto-ignition sensitivity to the temperature in new engine combustors is a challenge in the community of numerical combustion. This paper is devoted to the modeling of temperature fluctuations for the simulation of reactive flows in real internal engine configurations. It aims at validating the temperature fluctuation equation model Truffin and Benkenida and its coupling with the ECFM3Z combustion model of Colin and Benkenida. Especially, this study focuses on the auto-ignition process which is described by the TK1 (Tabulated Kinetics for Ignition) model of Knop and Jay. TKI is based on a tabulation method for reaction rates and its coupling with the temperature fluctuation is achieved through a presumed PDF approach. The integral limits for the PDF integration are determined locally through transport equations with appropriate closures on isothermal walls. The resulting model, called TKI-uT, is applied on Homogeneous Charge Compression Ignition (HCCI) combustion mode engine for which the only source of thermal stratification is wall heat loss. Comparisons with experiments demonstrate the impact of temperature fluctuations and the ability of the model to improve the prediction of the auto-ignition model.
机译：在新型燃烧器中，对自动点火对温度的敏感性的预测是数值燃烧界的一个挑战。本文致力于温度波动的建模，以模拟实际内部发动机配置中的反应流。它旨在验证温度波动方程模型Truffin和Benkenida以及将其与Colin和Benkenida的ECFM3Z燃烧模型耦合。尤其是，这项研究着重于自动点火过程，该过程由Knop和Jay的TK1（点火的电动力学）模型描述。 TKI基于反应速率的制表法，其与温度波动的耦合通过假定的PDF方法实现。 PDF积分的积分极限是通过等温壁上适当封闭的传输方程式局部确定的。生成的模型称为TKI-uT，应用于均质充量压缩点火（HCCI）燃烧模式发动机，该发动机的唯一热分层来源是壁热损失。与实验的比较证明了温度波动的影响以及该模型改善自动点火模型预测的能力。

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