Experimental Study on Flow Instability in Parallel Channels with Supercritical Carbon Dioxide

Huang Jiajian; Zhou Yuan; Huang Yanping; Luo Qiao; Hu Wei

doi:10.13832/j.jnpe.2023.04.0220

Volume 44 Issue 4

Aug. 2023

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Huang Jiajian, Zhou Yuan, Huang Yanping, Luo Qiao, Hu Wei. Experimental Study on Flow Instability in Parallel Channels with Supercritical Carbon Dioxide[J]. Nuclear Power Engineering, 2023, 44(4): 220-225. doi: 10.13832/j.jnpe.2023.04.0220

Citation:

Huang Jiajian, Zhou Yuan, Huang Yanping, Luo Qiao, Hu Wei. Experimental Study on Flow Instability in Parallel Channels with Supercritical Carbon Dioxide[J]. Nuclear Power Engineering, 2023, 44(4): 220-225. doi: 10.13832/j.jnpe.2023.04.0220

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Experimental Study on Flow Instability in Parallel Channels with Supercritical Carbon Dioxide

doi: 10.13832/j.jnpe.2023.04.0220

1.
College of Physics, Sichuan University, Chengdu, 610065, China
2.
Nuclear Power Institute of China, Chengdu, 610213, China
3.
Department of Naval Armament, Chengdu, 610000, China

Received Date: 2023-04-13
Rev Recd Date: 2023-06-08
Publish Date: 2023-08-15

Abstract

Abstract

Carbon dioxide has unique physical and chemical properties near the quasi-critical point. The Bretton cycle system using supercritical carbon dioxide (S-CO₂) as heat exchange medium has considerable system thermal efficiency, but the drastic change of physical properties may lead to the problem of flow instability. In this work, the experimental study of S-CO₂ flow instability in two-channel is carried out, and the experimental data of flow instability are obtained. The results show that the flow instability occurs in both the positive and negative slope regions of the natural cycle power-flow curve. The flow instability in the first section is systemic oscillation with a long period, and it is concluded as pressure drop oscillation, while the flow instability in the second section is inter-channel high-frequency oscillation. The onset power of the instability increases linearly with the increasing of system pressure and inlet mass flow rate. Therefore, increasing the system pressure and inlet mass flow rate will enhance the stability.
- Super critical carbon dioxide (S-CO₂),
- Parallel channels,
- Flow instability

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References(10)

References

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