Advanced benchmark of the flow through a mixing vane grid – Large eddy simulation validation
نویسندگان
چکیده
Identifying what causes fuel assembly vibrations downstream of Mixing Vane Grids (MVG) in Pressurized Water reactor (PWR) is paramount importance for nuclear community to understand grid-to-rod fretting wear. Experiments, called CALIFS, were carried out by the Atomic Energy Commission (CEA) on a 5 × MVG at hydraulic Reynolds number 66,000, order measure flow velocity and pressure along central rod. In parallel, benchmark Large Eddy Simulation (LES) was setup compare predictions three different CFD codes: Star-CCM+, Code_Saturne TrioCFD experimental measurements. The computational domain representative span CALIFS mockup, composed rod bundle with MVG. computations overall give very satisfactory results, independently from mesh created modelling options selected. It seems suggest that whatever software used, this kind calculations has reached significant level robustness accuracy. Nonetheless, some discrepancies remain concerning standard deviation decay far mixing vane grid.
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ژورنال
عنوان ژورنال: Nuclear Engineering and Design
سال: 2021
ISSN: ['0029-5493', '1872-759X']
DOI: https://doi.org/10.1016/j.nucengdes.2021.111335