Experimental Study of Natural Circulation Flow Instability in Rectangle Channels

Chen Juan; Zhou Tao; Qi Shi; Ma Dongliang; Xiao Zejun

doi:10.13832/j.jnpe.2017.02.0051

Volume 38 Issue 2

Feb. 2025

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Chen Juan, Zhou Tao, Qi Shi, Ma Dongliang, Xiao Zejun. Experimental Study of Natural Circulation Flow Instability in Rectangle Channels[J]. Nuclear Power Engineering, 2017, 38(2): 51-55. doi: 10.13832/j.jnpe.2017.02.0051

Citation:

Chen Juan, Zhou Tao, Qi Shi, Ma Dongliang, Xiao Zejun. Experimental Study of Natural Circulation Flow Instability in Rectangle Channels[J]. Nuclear Power Engineering, 2017, 38(2): 51-55. doi: 10.13832/j.jnpe.2017.02.0051

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Experimental Study of Natural Circulation Flow Instability in Rectangle Channels

doi: 10.13832/j.jnpe.2017.02.0051

Chen Juan^1,2,
Zhou Tao^1,2,
Qi Shi^1,2,
Ma Dongliang^1,2,
Xiao Zejun³

1. School of Nuclear science and Engineering, North China Electric Power University, Beijing, 102026, China;
2. CNNC Key Laboratory on Nuclear Reactor Thermal Hydraulics Technology, Chengdu, 610041, China;
3. Beijing Key Laboratory of Passive Safety Technology for Nuclear Energy, North China Electric Power University, Beijing, 102206, China

Received Date: 2016-05-25
Rev Recd Date: 2016-09-26

Available Online: 2025-02-09

Abstract

Abstract

Results under different heating power conditions were conducted in rectangle channels with 5mm and 10 mm.Results for different heating powers were obtained.The results showed that the oscillation period of pressure value and volume flow are the same,but their phase positions are opposite.The existence of edge position and secondary flow will strengthen the disturbance of fluid flow in rectangle channels,which contributes to the heat transfer.The disturbance of bubble and fluid will be strengthened,especially in the saturated boiling section,which makes it possible for the mixing flow.The results also showed that the resistance in 5mm channel is bigger than that in 10 mm channel,and it is less likely to form stable natural circulation in the subcooled region.
- Natural circulation,
- Rectangle channel,
- Flow instability,
- Subcooled boiling