NDLI: Numerical Analysis of Unsteady Conjugate Heat Transfer and Thermal Stress for a PWR Pressurizer Surge Line Pipe Subjected to Thermal Stratification

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Jo, Jong Chull Choi, Young Hwan Choi, Seok Ki
Copyright Year	2002
Abstract	This paper addresses three-dimensional numerical analyses of the unsteady conjugate heat transfer and thermal stress for a PWR pressurizer surge line pipe with a finite wall thickness, subjected to internally thermal stratification. A primary emphasis of the present study is placed on the investigation of the effects of surge flow direction on the determinations of the transient temperature and thermal stress distributions in the pipe wall. In the present numerical analysis, the thermally stratified flows (in-surge flow and out-surge flow) in the pipe line are simulated using the standard κ-ε turbulent model and a simple and convenient numerical method of treating the unsteady conjugate heat transfer on a non-orthogonal coordinate system is developed. The unsteady conjugate heat transfer analysis method is implemented in a finite volume thermal-hydraulic computer code based on a non-staggered grid arrangement, SIMPLEC algorithm and higher-order bounded convection scheme. The finite element method is employed for the thermal stress analysis to calculate non-dimensional stress distributions at the piping wall as a function of time. Some numerical calculations are performed for a PWR pressurizer surge line pipe model with shortened length, subjected to internally thermal stratification caused either by insurge or outsurge flow with a specified velocity, and the results are discussed in detail.
Sponsorship	Pressure Vessels and Piping Division
Starting Page	121
Ending Page	131
Page Count	11
File Format	PDF
ISBN	0791819469
DOI	10.1115/PVP2002-1137
Volume Number	Thermal Hydraulic Problems, Sloshing Phenomena, and Extreme Loads on Structures
Conference Proceedings	ASME 2002 Pressure Vessels and Piping Conference
Language	English
Publisher Date	2002-08-05
Publisher Place	Vancouver, BC, Canada
Access Restriction	Subscribed
Subject Keyword	Computers Temperature Turbulence Pipelines Thermal stratification Finite element methods Wall thickness Surges Flow (dynamics) Convection Stress Transients (dynamics) Numerical analysis Algorithms Pipes Pressurized water reactors Heat transfer Thermal stresses Stratified flow
Content Type	Text
Resource Type	Article

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