Numerical Simulation of Condensation in Supercritical CO<sub>2</sub> Compressor Based on Equilibrium Condensation Model

Chen Laijie; Lu Chuan; Shen Xin; Yi Jingwei; Li Yang; Ouyang Hua; Du Zhaohui

doi:10.13832/j.jnpe.2022.03.0165

Volume 43 Issue 3

Jun. 2022

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Article Navigation > Nuclear Power Engineering > 2022 > 43(3): 165-172

Chen Laijie, Lu Chuan, Shen Xin, Yi Jingwei, Li Yang, Ouyang Hua, Du Zhaohui. Numerical Simulation of Condensation in Supercritical CO2 Compressor Based on Equilibrium Condensation Model[J]. Nuclear Power Engineering, 2022, 43(3): 165-172. doi: 10.13832/j.jnpe.2022.03.0165

Citation:

Chen Laijie, Lu Chuan, Shen Xin, Yi Jingwei, Li Yang, Ouyang Hua, Du Zhaohui. Numerical Simulation of Condensation in Supercritical CO₂ Compressor Based on Equilibrium Condensation Model[J]. Nuclear Power Engineering, 2022, 43(3): 165-172. doi: 10.13832/j.jnpe.2022.03.0165

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Numerical Simulation of Condensation in Supercritical CO₂ Compressor Based on Equilibrium Condensation Model

doi: 10.13832/j.jnpe.2022.03.0165

1.
School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
2.
Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610213, China

Received Date: 2021-05-06
Rev Recd Date: 2021-09-16
Publish Date: 2022-06-07

Abstract

Abstract

Supercritical carbon dioxide (sCO₂) Brayton cycle is one of the main solutions of the Generation IV nuclear reactor energy conversion system. During the actual operation, sCO₂ in the compressor may condense. As a result, the efficiency is reduced and the operation stability is affected. In this paper, the equilibrium condensation numerical model of sCO₂ was established with the Span-Wagner model, and the numerical simulation of the sCO₂compressor was carried out. The main condensation regions, causes and influences of the condensation of sCO₂were analyzed. The results show that the condensation of SCO₂is mainly affected by the flow velocity. The condensation of sCO₂occurs in the area above 50% blade height on the suction surface of the leading edge of the main blade and near the pressure surface in the leading edge gap. The former area is caused by local acceleration of sCO₂, and the latter area is caused by tip clearance leakage; Under the given working condition, the condensation area is very small, which does not extend to the whole channel, the condensed sCO₂ is very little, and no two-phase flow is formed, which has little influence on the operation of the compressor.
- Supercritical carbon dioxide(sCO₂),
- Centrifugal compressor,
- Numerical simulation,
- Condensation

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References(22)

References

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