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RESEARCH PAPERS

Steady-State Thermal Simulation of Weld Applied to a Practical Axisymmetric Weldment

[+] Author and Article Information
Ken Uchida, Rie Sumiya

Power & Industrial Systems R&D Center, Toshiba Corporation, 8 Shinsugita-Cho, Isogo-Ku, Yokohama-Shi 235-8523, Japan

Tadashi Murofushi, Masakazu Jimbo

Isogo Nuclear Engineering Center, Toshiba Corporation, 8 Shinsugita-Cho, Isogo-Ku, Yokohama-Shi 235-8523, Japan

J. Pressure Vessel Technol 129(2), 262-271 (Sep 03, 2006) (10 pages) doi:10.1115/1.2716430 History: Received September 14, 2005; Revised September 03, 2006

Steady-state Eulerian analysis on thermal simulation of welds using moving coordinates is known as a very computationally efficient method. This paper presents a method of Eulerian analysis that uses commercial computational fluid dynamics code. In order to show the practical availability of the Eulerian method, the method is applied to an analysis of a circumferential weld of a core shroud in a boiling water reactor. In this analysis, the double ellipsoidal power density distribution model proposed by Goldak, Chakravarti, and Bibby (1984, Metall. Trans. B, 15B, pp. 299–305) is applied for the weld heat source, the temperature dependency of thermal properties is considered, and the effect of latent heat is treated by enthalpy method. Comparison of the analyzed temperature histories at several locations on the surface of the weldment to the measured results shows that the numerical results reproduce the measured results well.

Copyright © 2007 by American Society of Mechanical Engineers
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References

Figures

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Figure 2

Section of focused groove

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Figure 3

Location of thermocouples

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Figure 4

Cross-sectional macrograph of the weld bead

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Figure 5

Bead sequence from the macrograph

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Figure 6

Measured temperature history for second pass

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Figure 7

Measured temperature history for twelfth pass

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Figure 8

Measured temperature history for thirty-sixth pass

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Figure 9

Heat conductivity (5)

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Figure 10

Specific heat (5)

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Figure 11

Modified heat conductivity from (5)

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Figure 12

Definition of the double ellipsoid heat source configuration

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Figure 13

Computational grid model

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Figure 14

Temperature distribution (second pass)

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Figure 15

Temperature distribution (twelfth pass)

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Figure 16

Temperature distribution (thirty-sixth pass)

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Figure 17

Temperature histories (second pass) (with markers: analysis, without markers: experiment)

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Figure 18

Temperature histories (twelfth pass) (with markers: analysis, without markers: experiment)

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Figure 19

Temperature histories (thirty-sxith pass) (with markers: analysis, without markers: experiment)

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