Evaluation of a numeric procedure for flow simulation of a 5 × 5 PWR rod bundle with a mixing vane spacer

Navarro, Moysés A.; Santos, Adimir dos

doi:10.1016/j.pnucene.2011.08.002

Cited by 60 publications

(13 citation statements)

References 19 publications

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“…The geometrical parameters of the SC and MV come from the work of Karoutas et al [9], as shown in Figure 2. The parameters of this object can be found in the reference from Navarro and Santos [10]. The object of SG is a part of AFA2G grid as shown in Figure 3, and the parameters can be obtained from Ma [11].…”

Section: Research Objects and Approachesmentioning

confidence: 99%

Challenge Analysis and Schemes Design for the CFD Simulation of PWR

Chen

Zhang

Tian

et al. 2017

Science and Technology of Nuclear Installations

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CFD simulation for a PWR is an important part for the development of Numerical Virtual Reactor (NVR) in Harbin Engineering University of China. CFD simulation can provide the detailed information of the flow and heat transfer process in a PWR. However, a large number of narrow flow channels with numerous complex structures (mixing vanes, dimples, springs, etc.) are located in a typical PWR. To obtain a better CFD simulation, the challenges created by these structural features were analyzed and some quantitative regularity and estimation were given in this paper. It was found that both computing resources and time are in great need for the CFD simulation of a whole reactor. These challenges have to be resolved, so two schemes were designed to assist/realize the reduction of the simulation burden on resources and time. One scheme is used to predict the combined efficiency of the simulation conditions (configuration of computing resources and application of simulation schemes), so it can assist the better choice/decision of the combination of the simulation conditions. The other scheme is based on the suitable simplification and modification, and it can directly reduce great computing burden.

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Section: Research Objects and Approachesmentioning

confidence: 99%

Challenge Analysis and Schemes Design for the CFD Simulation of PWR

Chen

Zhang

Tian

et al. 2017

Science and Technology of Nuclear Installations

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“…Schikorr et al [14] improved Rehme's correlation include grid spacers with mixing devices based on new pressure drop measurements. Morovere, recent studies [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] have reported that the mixing vanes cause cross and THERMAL SCIENCE: Year 2019, Vol. 23,No.…”

Section: Introductionmentioning

confidence: 99%

Computational fluid dynamic simulation of swirl flow in hexagonal rod bundle geometry by split mixing vane grid spacers

Nazififard

2019

THERM SCI

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Heat transfer and pressure drop are numerically investigated for turbulent flows through a hexagonal fuel rod bundle. For the purpose of numerical analysis, the geometric and boundary conditions were taken from the VVER-1000. Since VVER-1000 does not have mixing vane on the grid spacer of the fuel assembly, split mixing vane is designed to boost turbulent flow and heat transfer in the rod bundle subchannels. The computational domain including two grid spacers extend from 100 × D h upstream of the first grid spacer to 250 × D h downstream of the second grid spacer. The steady-state form of the RANS, mass, energy and turbulence equations was discretized and solved using ANSYS-CFX. The standard k-ε model is employed to simulate turbulence. The results show a considerable increase in the average heat transfer to ~10 × D h downstream of the grid spacer using the mixing vane on the grid spacer of VVER type reactor. As expected, the pressure loss through the grid spacer also increased slightly with the mixing vanes.

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“…Smith et al (Smith et al, 2002) proved that CFD method can be used to investigate the flow characteristics and temperature distribution in a PWR fuel bundle under single phase by comparing with benchmark experiment data provided by Westinghouse. Navarro and Santos (2011) performed a simulation on a 5 Â 5 rod bundle segment with a vaned spacer grid using CFX code under the flow condition of Karoutas' experiment (Karoutas et al, 1995). The results showed a good agreement with experiments in the axial and lateral velocity distribution.…”

Section: Introductionmentioning

confidence: 99%