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Vol.6 No.4previous AA 82-SP13 (83-84-85-86)-NT67-68

Academic Articles
Review Paper Vol.6 No.4 (2015) p.118 - p.130
 

A Review of Evaluation Methods Developed for Numerical Simulation of the Temperature Fluctuation Contributing to Thermal Fatigue of a T-junction Pipe

 
Akira NAKAMURA1, Yoichi UTANOHARA1, Koji MIYOSHI1, Naoto KASAHARA1
 

1 Institute of Nuclear Safety System, Inc., 64 Sata, Mihama-cho, Mikata-gun, Fukui 919-1205, Japan
2 The University of Tokyo, School of Engineering, 7-3-1, Bunkyo-ku, Tokyo 113-8656, Japan

 
Abstract
This paper reviews the current status of numerical simulation evaluation methods for evaluation of thermal fatigue in a T-junction pipe and identifies future research items to enhance the methods. The influencing factors of numerical simulation methods on the evaluation of temperature fluctuation near a wall are discussed. Then the mechanism of thermal fatigue and the numerical simulation evaluation methods are described, and the influencing factors such as turbulence models, differencing schemes, computational meshes and inlet conditions are discussed. Some recent models LES, SAS, and combined models are examined to assess fluid temperature fluctuation. Differencing schemes and mesh fineness are important to keep the accuracy of calculations. Regarding boundary conditions, the inlet flow conditions, velocity profile and velocity perturbation, influence the temperature fluctuation.
 
Keywords
thermal fatigue, thermal stress, temperature fluctuation, numerical simulation, T-junction pipe, thermal striping
 
Full Paper: PDF EJAM Vol.6No.4 pp.118-130 "A Review of Evaluation Methods Developed for Numerical Simulation of the Temperature Fluctuation Contributing to Thermal Fatigue of a T-junction Pipe"
Article Information
Article history:
Received 8 May 2014
Accepted 17 July 2014