Communication Dans Un Congrès Année : 2024

Experimental qualification of a PIV and two-dye LIF temperature field measurement system with the "filling box" experiment in liquid flow

Résumé

Predicting the evolution of reactor core thermo-hydraulic systems in accidental conditions is a major topic in the industry, aimed at ensuring the safety of nuclear plants. The behavior of these systems is studied by solving the volume, momentum, and energy equations of fluid mechanics. Given the size of the hydraulic circuit, various averaging methods are applied to achieve an acceptable computational cost. One such method is the macro-porous double filtering method, suggested by Drouin [1] and others. This method exposes instantaneous and local diffusion and dispersion terms in the energy balance equation, requiring physical models and experimental calibrations. This study aims to establish and qualify an instantaneous measurement system for the temperature and velocity field, combining PIV (Particle Image Velocimetry) and LIF (Laser-Induced Fluorescence). This combined system, which has not been set up, could calibrate the diffusion and dispersion terms. The qualification is conducted in the 'filing box' experiment, characterized by a physical model, connecting the velocity and temperature fields of buoyancy-driven flow. This experiment will serve as our case study. Subsequently, this system be adapted to METERO-V loop, an experimental thermal-hydraulic facility, dedicated for the modeling of 3D flows in nuclear reactor cores, generating velocity and thermal mixing layers in rod bundles, encountered in loss-of-coolant accidents.

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cea-04675570 , version 1 (22-08-2024)

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  • HAL Id : cea-04675570 , version 1

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Vincent Helfer, Benjamin Cariteau, Philippe Fillion, A Toutant. Experimental qualification of a PIV and two-dye LIF temperature field measurement system with the "filling box" experiment in liquid flow. SWINTH 2024, Jun 2024, Dresden, Germany. pp.056. ⟨cea-04675570⟩
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