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针对一维经典肋传热方程及近似解的局限性 ,推出了等截面柱形直肋的一维修正肋传热方程及修正近似解。进一步针对工程中肋端传热时传热量的简化计算法提出了一种新的更为精确的修正简化计算公式。数值比较结果表明 :提出的公式不仅具有原经典公式相同形式及简洁性 ,而且使得肋根部热流率及各截面平均温度的计算精度有了显著的提高 ,并将公式的应用范围扩大至较大 Bi数 ,这为肋片的工程设计优化和应用提供了更为准确而直观的求解方法。图 2表 2参 5
Aiming at the limitation of one-dimensional classical rib heat transfer equation and approximate solution, a one-dimensional modified rib heat transfer equation of equal cross-section cylindrical rib and a modified approximate solution are introduced. Aiming at the simplified calculation method of heat transfer in heat transfer at ribbed end, a new and more accurate correction simplified calculation formula is proposed. The numerical results show that the proposed formula not only has the same form and simplicity of the original classical formula but also significantly improves the calculation accuracy of the heat flow rate at the root of the rib and the average temperature of each section, and expands the application range of the formula to larger Bi This provides a more accurate and intuitive solution to the engineering design optimization and application of the fins. Figure 2 Table 2 reference 5