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首页> 外文期刊>Journal of enhanced heat transfer >EFFECT OF CONDENSATE FLOW RATE AND VAPOR VELOCITY ON CONDENSATE RETENTION FOR PIN-FIN TUBES
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EFFECT OF CONDENSATE FLOW RATE AND VAPOR VELOCITY ON CONDENSATE RETENTION FOR PIN-FIN TUBES

机译：冷凝水流速和蒸气速度对针鳍管冷凝水保留的影响

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摘要

The experimental work has been reported for condensate retention/retention angle of water on the series of pin fin tubes of varying circumferential fin spacing and fin thickness for the range of vapor velocity and condensate flow rate. An equivalent integral fin tube is utilized for comparison. It is found that velocity and condensate flow rate significantly affect the condensate retention. At zero vapor velocity, condensate flow rate is the only controlling factor for condensate retention, but at a higher velocity, dependency of condensate retention on flow rate is minimal. By increasing the condensate flow rate at zero vapor velocity, the decrease in retention angle (theta(R)) is slight, approximately from pi/2 to pi/4. For a circumferential fin thickness series of tubes, flow rate has more effect on decreasing the retention angle as compared to circumferential fin spacing tubes. In contrast, vapor velocity has a strong effect on increasing the retention angle for a circumferential fin spacing series as compared to a circumferential fin thickness series.
机译：据报道，在蒸汽速度和冷凝水流速范围内，在一系列圆周翅片间距和翅片厚度不同的针状翅片管上，冷凝水的保留/保留角实验工作已经报道。使用等效的整体翅片管进行比较。发现速度和冷凝水流速显着影响冷凝水的保留。在零蒸汽速度下，凝结水流速是凝结水保留的唯一控制因素，但在较高速度下，凝结水滞留对流速的依赖性最小。通过在零蒸汽速度下增加冷凝物流速，保留角的减小很小，大约从pi / 2到pi / 4。对于周向翅片厚度系列的管，与周向翅片间隔管相比，流速对减小保持角具有更大的影响。相反，与周向翅片厚度系列相比，蒸气速度对增加周向翅片间隔系列的保持角具有强烈的影响。

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