Study on Drag Force Model of High-Temperature Particle Under Steam Entrainment

Peng Cheng; Deng Jian

doi:10.13832/j.jnpe.2022.06.0061

Volume 43 Issue 6

Dec. 2022

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Peng Cheng, Deng Jian. Study on Drag Force Model of High-Temperature Particle Under Steam Entrainment[J]. Nuclear Power Engineering, 2022, 43(6): 61-65. doi: 10.13832/j.jnpe.2022.06.0061

Citation:

Peng Cheng, Deng Jian. Study on Drag Force Model of High-Temperature Particle Under Steam Entrainment[J]. Nuclear Power Engineering, 2022, 43(6): 61-65. doi: 10.13832/j.jnpe.2022.06.0061

Peng Cheng, Deng Jian. Study on Drag Force Model of High-Temperature Particle Under Steam Entrainment[J]. Nuclear Power Engineering, 2022, 43(6): 61-65. doi: 10.13832/j.jnpe.2022.06.0061

Citation:

Peng Cheng, Deng Jian. Study on Drag Force Model of High-Temperature Particle Under Steam Entrainment[J]. Nuclear Power Engineering, 2022, 43(6): 61-65. doi: 10.13832/j.jnpe.2022.06.0061

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Study on Drag Force Model of High-Temperature Particle Under Steam Entrainment

doi: 10.13832/j.jnpe.2022.06.0061

Peng Cheng^1
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Deng Jian^{2
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1.
College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, China
2.
Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610213, China

Received Date: 2021-11-17
Rev Recd Date: 2022-01-05
Publish Date: 2022-12-14

Abstract

Abstract

The settling process of high-temperature melt in coolant is related to the triggering of steam explosion and the development of follow-up process, and affects the design and implementation of serious accident mitigation measures. Based on the entrainment of the steam film on the surface of high-temperature particles, a semi-empirical relation for predicting the drag force coefficient of particles in the coolant during the coarse mixing stage is constructed by means of theoretical modeling and experimental fitting, which can be expressed as a function of particle Froude number (Fr_p) and entrainment Reynolds number (Re_α). By comparing with the experimental data of boiling motion in the falling coolant of high-temperature steel ball, it is verified that the entrainment effect of steam in the initial stage of coarse mixing is the main factor of particle settling. In addition, the change of settling velocity is affected by the diameter of high-temperature particles. The smaller the diameter of the particles is, the closer the settling characteristics are to the "cold particles", which is mainly related to the decrease of steam entrainment.
- Drag force coefficient,
- Steam entrainment,
- High-temperature particle,
- Coarse mixing

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References(14)

References

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