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首页> 外文期刊>Journal of enhanced heat transfer >INTERMITTENT LOW MASS FLUX SPRAY COOLING AT HIGH TEMPERATURE: A NOVEL METHODOLOGY FOR THE AUGMENTATION OF HEAT FLUX IN TRANSITION BOILING REGIME
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INTERMITTENT LOW MASS FLUX SPRAY COOLING AT HIGH TEMPERATURE: A NOVEL METHODOLOGY FOR THE AUGMENTATION OF HEAT FLUX IN TRANSITION BOILING REGIME

机译：间歇式高温低通量喷雾冷却：过渡沸腾过程中提高热通量的新方法

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摘要

In the absence of disadvantages of various cooling methodologies reported in the literature, in the current work, enhancement at high temperature by using low mass flux spray recommended for cooling of thin strip is achieved. By decreasing the droplet renewal rate and augmenting the residence time, the aforesaid has been achieved. In the current work, from the attainment of these conditions in the cooling process, the spray cooling was made intermittent. The result reveals that heat extraction rate enhances with increasing the mass flux from 0.25 x 10(-6) to 9.25 x 10(-6) kg/m(2)s and further increment in mass flux decreases the heat transfer rate. In addition, the obtained critical heat flux (CHF) is higher than the CHF achieved by changing the nozzle orientation and the achieved T-CHF is lower in the case of a multispray low mass flux nozzle. Further, comparative study clearly reveals significant reduction of coolant consumption rate and operating pressure in comparison with the information reported in the literature. However, the CHF and heat transfer coefficient are comparable but lower.
机译：在没有文献报道的各种冷却方法的缺点的情况下，在当前的工作中，通过使用推荐用于薄带材冷却的低质量通量喷雾来实现高温下的增强。通过降低液滴的更新速率并增加停留时间，已经实现了上述目的。在当前的工作中，从在冷却过程中达到这些条件开始，使喷雾冷却是间歇性的。结果表明，随着质量通量从0.25 x 10（-6）增大到9.25 x 10（-6）kg / m（2）s，吸热率提高，并且质量通量的进一步增加降低了传热速率。此外，获得的临界热通量（CHF）高于通过更改喷嘴方向获得的CHF，而在多喷雾低质量通量喷嘴的情况下，获得的T-CHF较低。此外，对比研究清楚地表明，与文献报道的信息相比，冷却剂消耗率和工作压力显着降低。但是，CHF和传热系数相当，但较低。

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