【摘要】 为改善太阳能空气集热器的综合性能，文章将吸热板表面按照V型方式离散地冲压下凹成抛物面形凸起结构，使用数值分析方法研究了不同雷诺数Re、抛物面形凸起结构的高径比（e/d）、气流攻击角（α）和相对节距（p/e）下，空气通道内的流动与传热特性，在综合传热系数最大时得到了凸起结构的最佳参数组合：e/d=1,α=60°，p/e=16。在所研究的雷诺数范围内，与光滑板结构相比，文章的最优结构将空气的进、出口温差平均提高了5.3℃，集热效率相应也平均提高了15%。采用集热效率和有效效率对此结构集热器性能的评价结果表明：文章所设计的抛物面形凸起结构集热器实现了热能利用效率与流体输运能效的有机统一。更多还原

【Abstract】 To improve the comprehensive performance of solar air heater, the parabolic protrusions were discretely fixed on the lower surface of the absorber plate as “V” shape. The flow and heat performance in the airflow were numerically studied under different conditions of Reynolds numbers, ratio of height to print diameter of parabolic protrusion(e/d), air attack angle(α) and relative pitch(p/e), respectively. According to the evaluation result by the comprehensive heat transfer coefficient, the optimal parameters are e/d =1, α =60 ° and p/e =16.Compared with the smooth plate, the average temperature difference between the outlet section and the inlet section and the average thermal efficiency have been improved up to 5.3 ℃ and 15%by the optimal curved protrusion structure when Re ranges from 4 000 to 18 000, respectively. And the optimal curved protrusion structure designed by this study realizes the organic unity of heat energy utilization efficiency and fluid transport efficiency.更多还原