Partager

Analyse précise par simulation du champ thermique dans du béton de masse avec un système de refroidissement par canalisation d'eau.

Precise simulation analysis of the thermal field in mass concrete with a pipe water cooling system.

Auteurs : LIU X., ZHANG C., CHANG X., et al.

Type d'article : Article

Résumé

Thermal analysis is one of the main components in the design and construction of mass concrete structures. A procedure for a heat-fluid coupling model (HFCM) is presented to simulate the thermal field of mass concrete with a pipe cooling system, which can accurately reflect the temperature gradient near the pipe and the temperature rise along the pipe. Additionally, to make it suitable for the simulation of forced-convection during pipe cooling, a modified particle swarm optimization (MPSO) method, based on particle migration is adopted for parameter identification of the Dittus–Boelter equation used by the heat-fluid coupling model, according to field tests. To verify the accuracy and computation efficiency of the method, a simplified 3D model is simulated and compared to other numerical models. Subsequently, the model is applied to the analysis of a monolith of the Dagangshan high arch concrete dam in the construction period. The actual climatic conditions, cooling pipe system, cooling schedule and thermal properties of the materials are considered in the analysis. The simulation results indicate that the proposed method can effectively simulate the cooling pipe state, water temperature rise along the flow, and directional changes of the flow in the thermal field of mass concrete. Moreover, the temperatures determined by the numerical simulation are in good agreement with the monitoring values. Findings in this research show that the proposed HFCM is feasible and has attractive advantages in the simulation of the thermal field in practical complex mass concrete engineering projects with cooling pipe systems.

Détails

  • Titre original : Precise simulation analysis of the thermal field in mass concrete with a pipe water cooling system.
  • Identifiant de la fiche : 30014866
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 78
  • Date d'édition : 03/2015
  • DOI : http://dx.doi.org/10.1016/j.applthermaleng.2014.12.050

Liens


Voir d'autres articles du même numéro (19)
Voir la source

Indexation