Visualized Experimental Study on Sliding and Lift-Off of Bubbles in Narrow Rectangular Channel

XU Jian-jun; ZHUO Wen-bin; XIE Tian-zhou; CHEN Bing-de; HUANG Yan-ping

Mar. 2025

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XU Jian-jun, ZHUO Wen-bin, XIE Tian-zhou, CHEN Bing-de, HUANG Yan-ping. Visualized Experimental Study on Sliding and Lift-Off of Bubbles in Narrow Rectangular Channel[J]. Nuclear Power Engineering, 2013, 34(4): 73-78.

Citation:

XU Jian-jun, ZHUO Wen-bin, XIE Tian-zhou, CHEN Bing-de, HUANG Yan-ping. Visualized Experimental Study on Sliding and Lift-Off of Bubbles in Narrow Rectangular Channel[J]. Nuclear Power Engineering, 2013, 34(4): 73-78.

Citation:

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Visualized Experimental Study on Sliding and Lift-Off of Bubbles in Narrow Rectangular Channel

1. CNNC Key Laboratory on Nuclear Reactor Thermal Hydraulics Technology, Nuclear Power Institute of China, Chengdu, 610041, China;
2. National Energy R&D Center of Pressurized Water Reactor Technology, Nuclear Power Institute of China, Chengdu, 610041, China

Received Date: 2012-06-18
Rev Recd Date: 2013-05-10

Available Online: 2025-03-08

Abstract

Abstract

The phenomenon on sliding and lift-off of bubbles in a narrow rectangular channel were observed through the top view and side view of the narrow rectangular channel using a high speed digital camera.In inclined upward facing upflow boiling and in vertical downflow boiling,the bubble tends to lift off from the surface.The bubble velocity increases after lift-off from the heating surface,and the condensation phenomenon of lift-off bubble will occur when the bulk flow is subcooling,which results in the change of bubble shape.Base on the experimental results,the effects of different flow mode and heating surface inclined mode on the sliding and lift-off of bubble are analyzed.
- Sliding bubble,
- Interface shape,
- Narrow channel,