Thermal hydraulic investigations with different fuel diameters of pebble bed water cooled reactor in CFD simulation

Li, Hua; Qiu, Suizheng; Zhang, Youjia; Su, G.H.; Tian, Wenxi

doi:10.1016/j.anucene.2011.11.010

Cited by 26 publications

(17 citation statements)

References 9 publications

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“…The coolant flow characteristics can be studied by computational fluid dynamical (CFD) simulation (e.g., k ε model in ANSYS fluent (Li et al, 2012;Wu et al, 2018d), CFD-DEM coupled method (Li and Ji, 2013;Chen et al, 2016Chen et al, , 2017a, direct numerical simulation (DNS) (Shams et al, 2013b) or large eddy simulation (LES) (Ebara et al, 2010)) to study the interstitial flow between pebbles, or by thermalfluid network analysis code (e.g., Flownex (Venter and Lamprecht, 2012). In general, ANSYS fluent or most CFD codes, in combination with suitable RANS (Reynolds Averaged Navier-Stokes) and LES models, are suitable to simulate the local details of flow, turbulence and heat transfer, and limited scales whole thermal-hydraulic system, supposing the huge numbers of grids are allowed by computer-clusters or super-computers.…”

Section: Coolant Materials and Flowmentioning

confidence: 99%

“…It is extremely important to identify the local hot spot locations which relies on the understanding of thermodynamics and field distribution inside thereactor core (Chen and Lee, 2017). Therefore, heat transfer characteristics of regular structures, e.g., simple cubic (SC), body-centered cubic (BCC), and face-centered cubic (FCC) structures as well as their combinations, have been studied via both experimental measurement (Chen and Lee, 2017) and CFD simulations (Yesilyurt and Hassan, 2003;Lee et al, 2007aLee et al, , 2007bLaguerre et al, 2008;Kim et al, 2009;Sobes et al, 2011;Li et al, 2012;Shams et al, 2012Shams et al, , 2013cShams et al, , 2015Ferng and Lin, 2013). A test section was designed to measure the hot spots of pebbles packed in a face-centered-cubic (FCC) structure of the test facility, where the hot spots may result in the destruction of a pebble's integrity.…”

Section: Coolant Materials and Flowmentioning

confidence: 99%

“…Streamline distribution on the surface of the pellets and velocity vector distributions on horizontal planes(Li et al, 2012; reproduced with permission © Elsevier Ltd. 2011).…”

mentioning

confidence: 99%

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A review of pebble flow study for pebble bed high temperature gas-cooled reactor

Jiang

Yang

et al. 2019

Exp. Comput. Multiph. Flow

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The pebble bed high temperature gas-cooled reactor is a promising generation-IV reactor, which uses large fuel pebbles and helium gas as coolant. The pebble bed flow is a fundamental issue for both academic investigation and engineering application, e.g., reactor core design and safety analysis. This work performed a review of recent progress on pebble flow study, focusing on the important issues like pebble flow, gas phase hydrodynamics, and inter-phase heat transfer (thermal hydraulics). Our group's researches on pebble flow have also been reviewed through the aspects of phenomenological observation and measurement, voidage distribution, geometric and parameter optimization, pebble flow mechanisms, flow regime categorization, and fundamentals of modelings of pebble flow and radiation. Finally, the major problems or possible directions of research are concluded which would be some of our focuses on the pebble bed flow study.

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Section: Coolant Materials and Flowmentioning

confidence: 99%

Section: Coolant Materials and Flowmentioning

confidence: 99%

See 1 more Smart Citation

A review of pebble flow study for pebble bed high temperature gas-cooled reactor

Jiang

Yang

et al. 2019

Exp. Comput. Multiph. Flow

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“…Sun et al (2017) performed a quasi-static pebble flow of full scale German HTR-MODUL pebble bed with up to 360,000 frictional graphite spheres to investigate the influence of the drainage rate and the particle contact model on the main features of the pebble flow. Li et al (2012) studied the thermal-hydraulic characteristics of the pebble bed water-cooled reactor (PBWR) by computational fluid dynamics (CFD). They applied the "near-miss" model considering the problem on the mesh quality.…”

Section: Introductionmentioning

confidence: 99%

A CFD study on the effect of size of fuel sphere on PBR core

Latifi

Colangelo

Starace

2019

Exp. Comput. Multiph. Flow

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In this work, a thermal-hydraulic investigation of N2 as a coolant in a pebble bed reactor core has been performed using a porous media approach. Three different diameters of fuel sphere have been employed for the numerical simulations. The pebble bed reactor is a kind of packed bed reactor whose core is a long right circular cylinder with a height of 3.5 m and an outer diameter of 3.7 m. The finite volume method was used to solve the governing equations using ANSYS FLUENT 14.5. Several important thermal-hydraulic parameters have been investigated consisting of the coolant and solid temperatures, density, pressure drop, and the coolant temperature. Results show that when the fuel sphere diameter increases, the coolant temperature is almost the same, but the solid temperature increases and the pressure drop decreases.

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“…The realistic approach can get more detailed and localized characteristics in the fluid and solid fuel regions. Li et al 3 focused on size of pebbles using k À " turbulent model. The velocity and temperature distributions were obtained and analyzed in the different fuel diameters (e.g.…”

Section: Introductionmentioning

confidence: 99%

Computational fluid dynamics investigation of thermal-hydraulic characteristics in a simplified pebbled bed modular reactor core using different arrangements of fuel elements

Bai

Gui

Yang

et al. 2017

The Journal of Computational Multiphase Flows

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High-temperature gas-cooled reactor is a kind of advanced nuclear reactor in which the core is packed with spherical fuel elements. In high-temperature gas-cooled reactors, the operating temperature is higher than that in ordinary light water reactors. In an attempt to analyze the flow pattern and heat transfer situation to provide reference for the safe operation of the pebble bed reactors, a segment of simplified high-temperature gas-cooled reactor core is simulated with computational fluid dynamics method. Four kinds of arrangement, including simple cubic, body-centered cubic, face-centered cubic, and a combination structure of body-centered cubic and face-centered cubic, are studied, respectively. Based on the simulation results, higher heat transfer capability and lower pebble temperature are obtained in the case with the most compact arrangement. The drag coefficient (C d ) for four arrangements with different inlet Reynolds number (Re) is obtained and relationship between Re and C d is analyzed. In addition, a simulation with a broken fuel element in the bodycentered cubic fluid domain has been performed. The results show that the presence of broken fuel may result in uneven flow, which will change the heat transfer condition. So it is better to avoid broken fuel element in a high-temperature gascooled reactor.

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Thermal hydraulic investigations with different fuel diameters of pebble bed water cooled reactor in CFD simulation

Cited by 26 publications

References 9 publications

A review of pebble flow study for pebble bed high temperature gas-cooled reactor

A review of pebble flow study for pebble bed high temperature gas-cooled reactor

A CFD study on the effect of size of fuel sphere on PBR core

Computational fluid dynamics investigation of thermal-hydraulic characteristics in a simplified pebbled bed modular reactor core using different arrangements of fuel elements

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