竖直矩形窄流道内空泡行为对压降的影响特性

基金项目:

中核核反应堆热工水力技术重点实验室基金资助项目(9140C7101020802)

教育部高等学校博士学科点科研基金(20110191120019)

中央高校基本科研业务费资助(CDJRC10140004)

Characteristics of Effect of Vapor Bubble Behavior on Pressure Drop in Vertical Rectangular Narrow Channel

1. Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Chongqing University, Chongqing, 400044, China;
2. CNNC Key Laboratory on Nuclear Reactor Thermal Hydraulics Technology, Nuclear Power Institute of China, Chengdu, 610041, China

摘要: 对竖直矩形窄流道内的沸腾流动开展可视化实验研究,以探讨空泡行为对压降的影响特性。研究发现:在相同热工参数下,窄流道内的大量汽泡产生(OSV)点会早于常规流道出现。基于实验研究结果建立了计算窄流道内真实干度和空泡份额的关系式。窄流道内的空泡行为对压降有着重要的影响,且汽团形成会很容易造成窄流道的阻塞;然而,流道出口空泡份额的增加并不会导致总压降的单调性增加。
- 窄流道 /
- 压降 /
- 汽泡动力学
Abstract: A visual experimental study on flow boiling in vertical rectangular narrow channel was carried out,in order to investigate the effect of vapor bubble behavior on the characteristics of pressure drop.It was found that the OSV（Onset of Significant Vapor） could emerge earlier in narrow channel than in conventional channel with identical working thermal conditions.A correlation for predicting the real vapor quality and real vapor fraction was proposed based on the experimental result.It was also found that the vapor bubble behav-ior affected the pressure drop in narrow channel significantly,and the channel was blocked easily due to the vapor cluster formed in the narrow channel;the total pressure drop,however,did not increase linearly with the increasing of outlet vapor fraction.
- Narrow channel /
- Pressure drop /
- Bubble dynamics