Experimental Investigation of Critical Heat Flux in Rectangular Channels with Different Gap Sizes

LI Yong; XIONG Wanyu; YAN Xiao; HUANG Yanping

Volume 33 Issue 3

Mar. 2025

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Article Navigation > Nuclear Power Engineering > 2012 > 33(3): 42-45

LI Yong, XIONG Wanyu, YAN Xiao, HUANG Yanping. Experimental Investigation of Critical Heat Flux in Rectangular Channels with Different Gap Sizes[J]. Nuclear Power Engineering, 2012, 33(3): 42-45.

Citation:

LI Yong, XIONG Wanyu, YAN Xiao, HUANG Yanping. Experimental Investigation of Critical Heat Flux in Rectangular Channels with Different Gap Sizes[J]. Nuclear Power Engineering, 2012, 33(3): 42-45.

LI Yong, XIONG Wanyu, YAN Xiao, HUANG Yanping. Experimental Investigation of Critical Heat Flux in Rectangular Channels with Different Gap Sizes[J]. Nuclear Power Engineering, 2012, 33(3): 42-45.

Citation:

LI Yong, XIONG Wanyu, YAN Xiao, HUANG Yanping. Experimental Investigation of Critical Heat Flux in Rectangular Channels with Different Gap Sizes[J]. Nuclear Power Engineering, 2012, 33(3): 42-45.

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Experimental Investigation of Critical Heat Flux in Rectangular Channels with Different Gap Sizes

CNNC Key Laboratory on Nuclear Reactor Thermal Hydraulics Technology, Nuclear Power Institute of China, Chengdu, 610041, China

Received Date: 2011-02-05
Rev Recd Date: 2012-03-20

Available Online: 2025-03-08

Abstract

Abstract

Experiments on Critical Heat Flux（CHF） of Freon-12 have been carried out in the rectangular vertical channels with gap sizes of 1 mm,2 mm,and 3 mm,respectively.Analysis of CHF data in the different channels shows that CHF decreases as the increase of pressure,and while the exit quality rises,CHF falls down quickly.Meanwhile,CHF goes up as the mass velocity increases when the exit quality is lower,and contrarily,when the exit quality is higher,the increase of mass velocity results in the decrease of CHF.According to the analysis results,a conclusion can be drawn that gap sizes almost have no effect on the CHF in rectangular channels with gaps from 1 mm to 3 mm under the same condition in the experiment.
- Rectangular channel,
- Critical heat flux（CHF）,
- Gap size

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