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在波纹翅片上开设矩形翼和组合翼纵向涡发生器,采用数值模拟的方法分析其强化换热特性,分析辅翼的几何尺寸,包括辅翼攻角、长度和宽度等对换热增强比Nu/Nu_0以及综合强化换热因子(Nu/Nu_0)/(f/f_0)~(1/3)的影响。结果发现:矩形翼和组合翼能显著增强波纹翅片的对流换热;由于开设纵向涡发生器后使流动阻力增加,综合强化换热因子小于换热增强比;组合翼的换热增强比和综合强化换热因子均大于矩形翼;对于组合翼,随着辅翼攻角、辅翼长度或辅翼宽度的增加,换热增强比和综合强化换热因子均增加。
The rectangular wing and the longitudinal vortex generator of the combined wing are opened on the corrugated fin. Numerical simulation is conducted to analyze the characteristics of the enhanced heat transfer. The analysis of the geometry of the auxiliary wing, including the auxiliary wing attack angle, length and width, / Nu_0 and the heat transfer enhancement factor (Nu / Nu_0) / (f / f_0) ~ (1/3). The results show that the rectangular wing and the combination wing can significantly enhance the convective heat transfer of the corrugated fin; the flow resistance increases with the opening of the longitudinal vortex generator, the heat transfer enhancement ratio is smaller than the heat transfer enhancement ratio; For the combined wing, the heat transfer enhancement ratio and the comprehensive enhancement heat transfer factor both increase with the increase of the auxiliary wing attack angle, auxiliary wing length or auxiliary wing width.