ETD

Archivio digitale delle tesi discusse presso l'Università di Pisa

Tesi etd-04042008-195413


Tipo di tesi
Tesi di laurea specialistica
Autore
SIMONINI, GIORGIO
URN
etd-04042008-195413
Titolo
CFD Modeling of the IRIS Downcomer in Support to the Design Optimization
Dipartimento
INGEGNERIA
Corso di studi
INGEGNERIA ENERGETICA
Relatori
Relatore Prof. Ambrosini, Walter
Relatore Dott. Dzodzo, Milorad B.
Relatore Dott. Forgione, Nicola
Relatore Prof. Oriolo, Francesco
Parole chiave
  • Diffuser
  • Benchmark
  • Fluid Dynamic
  • IRIS
  • CFD
  • Parallel Confined Jets
  • Single Jet
Data inizio appello
06/05/2008
Consultabilità
Parziale
Data di rilascio
06/05/2048
Riassunto
This work is part of the thermo-hydraulic analyses that constitute the contribution of the University of Pisa to the international IRIS project. The aim of the present activity is to study, through the use of Computational Fluid Dynamics (CFD) codes, the flow inside the downcomer of the reactor. Identified the most relevant phenomena for the considered flow (single jet spreading, mixing of parallel jets and influence of confined domain), it was necessary to evaluate the capability of some commercial codes – CFX, STAR-CD, STAR-CCM+ and FLUENT – in correctly reproducing them. Therefore, experimental data concerning the single free jet and parallel confined jets were selected from the available literature. Owing to the obtained insight into phenomena, the simulation of the downcomer fluid flow was performed. Finally, basing on the obtained information some design modifications were proposed, aiming to the optimization of the flow structure in the downcomer; the performed simulations highlighted the capability of the proposed solutions in promoting the uniformity of the outlet velocities, while decreasing the pressure drop.
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