Experimental Study on Axial Evolution Characteristics of Single-phase Turbulent Mixing in Rod Bundle Sub-channels with Grids

Liu Shasha; Ma Zaiyong; Zhang Rui; Sun Wan; Zhang Luteng; Zhu Longxiang; Pan Liangming

doi:10.13832/j.jnpe.2024.03.0104

Volume 45 Issue 3

Jun. 2024

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Article Navigation > Nuclear Power Engineering > 2024 > 45(3): 104-109

Liu Shasha, Ma Zaiyong, Zhang Rui, Sun Wan, Zhang Luteng, Zhu Longxiang, Pan Liangming. Experimental Study on Axial Evolution Characteristics of Single-phase Turbulent Mixing in Rod Bundle Sub-channels with Grids[J]. Nuclear Power Engineering, 2024, 45(3): 104-109. doi: 10.13832/j.jnpe.2024.03.0104

Citation:

Liu Shasha, Ma Zaiyong, Zhang Rui, Sun Wan, Zhang Luteng, Zhu Longxiang, Pan Liangming. Experimental Study on Axial Evolution Characteristics of Single-phase Turbulent Mixing in Rod Bundle Sub-channels with Grids[J]. Nuclear Power Engineering, 2024, 45(3): 104-109. doi: 10.13832/j.jnpe.2024.03.0104

Citation:

Liu Shasha, Ma Zaiyong, Zhang Rui, Sun Wan, Zhang Luteng, Zhu Longxiang, Pan Liangming. Experimental Study on Axial Evolution Characteristics of Single-phase Turbulent Mixing in Rod Bundle Sub-channels with Grids[J]. Nuclear Power Engineering, 2024, 45(3): 104-109. doi: 10.13832/j.jnpe.2024.03.0104

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Experimental Study on Axial Evolution Characteristics of Single-phase Turbulent Mixing in Rod Bundle Sub-channels with Grids

doi: 10.13832/j.jnpe.2024.03.0104

Liu Shasha^{1, 2
,},
Ma Zaiyong^{1, 2
,
,},
Zhang Rui^{1, 2},
Sun Wan^{1, 2},
Zhang Luteng^{1, 2},
Zhu Longxiang^{1, 2},
Pan Liangming^{1, 2}

1.
Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing, 400044, China
2.
Department of Nuclear Engineering and Technology, Chongqing University, Chongqing, 400044, China

Received Date: 2023-06-30
Rev Recd Date: 2023-07-23
Publish Date: 2024-06-13

Abstract

Abstract

The turbulent mixing between rod bundle sub-channels is a key part that affects the accurate calculation of thermal parameters in the reactor core, which is of great significance to improve the accuracy of reactor safety analysis. For the turbulent mixing between rod bundle sub-channels with grids, the existing research often uses the thermal diffusion coefficient to study its average effect, and lacks detailed analysis of its axial evolution characteristics. In this paper, based on the tracer analysis method, the single-phase turbulent mixing characteristics of the two sub-channels with and without the grid were studied experimentally, and the experimental results showed that the grid had a significant enhancement effect on single-phase turbulent mixing. Compared with the non-grid condition, the enhancement effect of turbulent mixing at the grid was the strongest due to the strong disturbance of the grid and cross-flow effect, the near downstream of the grid was the weakest due to the reverse cross-flow effect, the far downstream of the grid was slightly stronger than the upstream of the grid, and the enhancement effect could last for a long distance.
- Grid,
- Rod bundle sub-channels,
- Axial direction,
- Single-phase,
- Turbulent mixing

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References(26)

References

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