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OALib Journal期刊
ISSN: 2333-9721
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椭圆管矩形偏心波纹翅片倾角对换热性能影响的数值研究
, PP. 12-16
Keywords: 矩形偏心波纹翅片,椭圆管,换热性能,流动阻力
Abstract:
应用fluent软件对5种波纹倾角的椭圆管矩形偏心波纹翅片在迎面风速v为0.5～4m/s范围内的换热性能进行了三维数值模拟,并对计算模型的可靠性和有效性进行了实验验证。研究表明,迎面风速和波纹倾角θ均会对翅片表面努塞尔数nu、压差损失δp和翅片管综合换热性能j/f产生影响,椭圆管矩形偏心波纹翅片的综合换热性能随着波纹倾角θ的增加而变差。分析沿流动方向翅片耦合面的平均nux值的变化趋势可预测适当增加翅片前端波纹倾角、减小翅片后部区域波纹倾角,既能增强换热性能又可减小阻力损失。
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