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柴油机缸内炭烟辐射传热的理论模型

Keywords: 辐射传热,缸内炭烟,柴油机

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Abstract:

基于瑞利散射理论,建立了一个简便分析柴油机缸内炭烟辐射传热的理论模型.该理论模型显示,缸内炭烟的辐射传热正比于缸内炭烟质量与其温度的5次方之乘积.通过对一台直喷式柴油机的多维仿真,验证了该模型作为一个全局模型的情况.结果显示,采用完全相同的输入数据时,该模型获得了与经典参考模型相吻合的结果,且模型的稳健性很好.模型中不含可调常数或直接与工况相关联的参数,比经典模型更直观、简洁,更适于柴油机缸内炭烟辐射传热的工程应用分析.

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