PIV measurement and numerical investigation on flow characteristics of simulated fast reactor fuel subassembly

Zhang, Cheng; Ju, Haoran; Zhang, Dalin; Wu, Shuijin; Xu, Yang; Wu, Yingwei; Qiu, Suizheng; Su, G.H.

doi:10.1016/j.net.2019.10.013

Cited by 8 publications

(3 citation statements)

References 18 publications

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“…For the sake of observing the position of the tracing particles [19][20] , the water is taken as the lubricant of PIV water, range: 0.0283~205258 m 3 /h.…”

Section: Lubricant Supply System Of Mldsbmentioning

confidence: 99%

Temperature Rise and Thermal Deformation of Magnetic Pole of MLDSB under Multiple Physical Field Coupling

Zhao¹,

Zhao²,

Li³

et al. 2020

Preprint

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The thermal deformation of magnetic poles caused by the heat loss of the coils of Magnetic Liquid Double Suspension Bearing (MLDSB) can reduced the gap between magnetic poles and magnetic sleeve, and the probability and degree of impact-rub can be increased in the working process of MLDSB. And the coatings of magnetic poles and magnetic sleeve can be worn overly, and the operation stability and service life of MLDSB will be reduced severely. The thermal deformation of magnetic poles can be affected by the material property of magnetic pole, the electric current of the coils, and the cooling effect of the lubricants and so on, so it belongs to the multiple physical field coupling. Therefore, the flow-solid-thermal coupled mathematics model of MLDSB is established and solved with ANSYS in this paper, and the distribution law of flow field of the magnetic pole is explored. The transfer path and distribution principles of heat loss are revealed and the distribution law of temperature rise and thermal deformation of magnetic pole in different operating conditions are explored. The results indicate that the temperature rise and thermal deformation of the stator is symmetrically distributed in the center, it gradually increase from the outside to the center, and the thermal deformation near the corner of magnetic pole is largest. The most heat loss can be taken away by the lubricants under the condition of heat balance. The thermal deformation of magnetic pole can increase linearly as the current gradually increase, and the stress is concentrated in the threaded hole and magnetic pole. The thermal deformation decreases linearly as the inlet pressure of the lubricants gradually increase. The PIV results of flow trace are basically consistent with the simulation results. The research in this paper can provide the theoretical reference for the structural design and the optimization of MLDSB.

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“…For the sake of observing the position of the tracing particles [19][20] , the water is taken as the lubricant of PIV water, range: 0.0283~205258 m 3 /h.…”

Section: Lubricant Supply System Of Mldsbmentioning

confidence: 99%

Temperature Rise and Thermal Deformation of Magnetic Pole of MLDSB under Multiple Physical Field Coupling

Zhao¹,

Zhao²,

Li³

et al. 2020

Preprint

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“…Zhang et al [40] studied the flow characteristics inside a 7-pin wire-wrapped fuel bundle of a fast reactor using PIV and found that wire-wrapper spacers enhance the crossflow. Delgado et al [41] studied the flow inside a helical coil steam generator using PIV and found that the flow characteristics were only related to the relative position of the flow in the rod bundle, independent of the ratio of tube spacing and tube diameter…”

Section: Introductionmentioning

confidence: 99%

Review of Refractive Index-Matching Techniques of Polymethyl Methacrylate in Flow Field Visualization Experiments

Fan

et al. 2023

International Journal of Energy Research

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The development of modern computational fluid dynamics (CFD) technology provides many preliminary references for experimental design. In addition, the CFD calculation results verified by experiments can display enormous microdata in areas that are difficult to measure through experiments, as an extension. This can make measurements more reasonable and effective, shorten measurement times, and save manpower and capital significantly. Therefore, it is vital to verify the accuracy of CFD calculation results, especially in cases of complex structures and multiphase flows. The results of model tests can be utilized in a prototype experiment by properly designing a test section and selecting a working fluid if the Reynolds similarity criterion is met. Optical measurement technology is a noninvasive measurement method, and the impact on the flow field can be almost negligible. It is advised to use transparent materials and prepare a refractive index-matching (RIM) fluid to obtain a good optical path. Polymethyl methacrylate (PMMA) is widely used in flow field visualization experiments because of its good light transmission and mechanical strength. This review is aimed at introducing the current status of different flow field measurement techniques; moreover, it is intended to help the readers to become more familiar with the principles of RIM, the characteristics, applications, and usage suggestions of various RIM fluid schemes of PMMA, providing references for researchers in the design, preparation, and conducting stages of flow field visualization measurement experiments. This review is divided into five sections. In the introduction section, Chapter 1, relevant research developments and related results of flow field measurements are presented, followed by the innovations and benefits of this paper. In Chapter 2, the flow field visualization measurements are presented and a derivation is shown. In Chapter 3, some RIM fluid schemes of PMMA and their applications are given, which are very valuable for peers. In Chapter 4, the measurement and analysis of some physical properties are described. In the RIM process, it is necessary to focus on the RI, density, dynamic viscosity, compatibility, stability, safety, and cost of RIM fluids. These factors greatly impact the accuracy of experimental results, experimental progress, and safety of the experimenters. Based on the analysis and our practical experience, some suggestions are given for preparing and using RIM fluids. In the conclusion section, Chapter 5, the results and practical implications of this paper are summarized.

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“…Fitted correlations of friction resistance coefficient and Nusselt number were proposed based on the experiment of LBE flowing in a tube. 16 Besides, many researchers carried out flow field visualization experiments using laser Doppler velocimetry and particle image velocimetry to study the flow behaviors under normal operation 17,18 and flow blockage conditions 19 in liquid metal fast reactors, which provided data for CFD validation.…”

mentioning

confidence: 99%

Thermal‐hydraulic analysis of wire‐wrapped rod bundle in lead‐based fast reactor with non‐uniform heat flux

Dong

Ahmad

Khan

et al. 2022

Intl J of Energy Research

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As one of the most promising advanced reactors, the lead-based fast reactor has drawn great attention due to economic and safety advantages. Investigating thermal hydraulics is essential for the design of a lead-based reactor.In this paper, a CFD simulation of a 19-wire-wrapped-rod bundle with leadbismuth eutectic (LBE) as coolant is carried out using the Reynoldsaveraged Navier-Stokes equation method, and four different types of axial non-uniform heat flux are applied. Excellent validation of results for thermal and hydraulic aspects is obtained first by comparing simulation results using turbulent model k-ω SST with experimental data and high-fidelity large eddy simulation data. The mechanism of transverse flow variation in subchannels and faces resulting from changing locations of wires is studied.

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PIV measurement and numerical investigation on flow characteristics of simulated fast reactor fuel subassembly

Cited by 8 publications

References 18 publications

Temperature Rise and Thermal Deformation of Magnetic Pole of MLDSB under Multiple Physical Field Coupling

Temperature Rise and Thermal Deformation of Magnetic Pole of MLDSB under Multiple Physical Field Coupling

Review of Refractive Index-Matching Techniques of Polymethyl Methacrylate in Flow Field Visualization Experiments

Thermal‐hydraulic analysis of wire‐wrapped rod bundle in lead‐based fast reactor with non‐uniform heat flux

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