Turbulence-induced vibration of coaxial cylinders with impinging inlets
Year: 2025
Type: article
Abstract: Pressure vessels submitted to turbulent fows are prone to fuid-structure interactions and vibrations. The design of a nuclear power plant comes along with the prediction of the large scale vibration pattern generated by turbulent fows exerted upon large areas of the core barrel containing the fuel assemblies. The present paper focuses on turbulent forcing in annular gaps with impinging inlets, in view of assessing the relevance of traditional models of reactor vessel studies and of improving future calculations. An analytical reference case is designed to test the pressure eld homogeneity hypothesis of the literature models. Pressure fluctuations associated to the turbulent flow are measured in an experimental mock-up and calculated in CFD simulations, at a gap Reynolds number of 105. The global flow pattern in the annular gap is first provided. The Power Spectrum Density of the pressure eld and its convection and coherence parameters are obtained both experimentally and numerically. A fair agreement is found between the measurements and the simulations, and the flow pattern appears inhomogenous in large proportions, contrary to the traditional representation. Furthermore, the rst mode of vibration of the inner cylinder is measured under turbulent forcing, and compared to the predictions of the simpli ed model and of CFD calculations: a fair agreement is observed. Finally, the literature model is revisited in the light of these ndings, and some potential improvements are discussed.
Source: Journal of Fluids and Structures
Authors: Maud Kocher, Pierre Moussou, Aurélien Joly, Sofiane Benhamadouche, Vincent Stobiac, Romain Lagrange, Domenico Panunzio, Philippe Piteau
Institutions: Centre National de la Recherche Scientifique, Électricité de France (France), Institut des Sciences de la Mécanique et Applications Industrielles, Centre d'Enseignement et de Recherche en Environnement Atmosphérique, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Université Paris-Saclay, CEA Paris-Saclay, Service d'Etudes Mécaniques et Thermiques
Language: English
Subfield: Computational Mechanics
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,740
OpenAlex ID: W7109033511