作　　者： ; ; ;

机构地区： 江苏科技大学机械与动力工程学院

出　　处： 《内燃机工程》 2005年第6期35-37,共3页

摘　　要： 从零维区域法模型出发,得到了柴油机缸内辐射传热单区模型中壁面有效吸收系数新的计算式。试验结果比较表明:建立的新模型能更准确地计算缸壁所得的辐射热流量;壁面有效吸收系数是壁面黑度和火焰辐射系数的函数,并随壁面黑度的增大而增大,随火焰辐射系数的增大而减小。与新模型方法相比,传统方法的相对误差随壁面黑度的增大而减小,当壁面黑度为0.6时,最大相对误差达18.9%。 Based on the zero dimensional zonal method, a new effective absorptivity model was derived. The new model was used to calculate the heat flux gained by the in-cylinder surface, comparison with the measured results and literature ones shows that the new model is more correct. The proposed model indicates that the surface effective absorptivity is the function of the surface emissivity and the flame radiation coefficient, which is increased with the increase of surface emissivity, and decreased with the increase of the flame radiation coefficient. Comparison with the new model, the relative error of traditional method decreases with the increase of surface emissivity. When surface emissivity is 0.6, the maximum relative error of the traditional method can reach 18.9%.

关 键 词： 内燃机 柴油机 辐射传热 模型 壁面有效吸收系数

领　　域： [动力工程及工程热物理]