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Heat Transfer Prediction of In-Service Welding in a Forced Flow of Fluid
Chalmers University of Technology. (Sjöfartsvetenskap)ORCID-id: 0000-0002-4871-4470
2009 (engelsk)Inngår i: Journal of Offshore Mechanics and Arctic Engineering-Transactions of The Asme, ISSN 0892-7219, E-ISSN 1528-896X, Vol. 131, nr 3, s. 1-6, artikkel-id 031304Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

An algorithm for heat transfer prediction of in-service welding operations in a forcedflow of fluid is presented. The algorithm presented is derived from Rosenthal’s 3D heatflow equation and boundary layer approximations. This was possible by the introductionof an apparent thermal conductivity kPL, which is a function of the boundary layer’s heattransfer coefficient f and the base material’s thickness . This implies that a weldcooling time tT1 /T2 in a forced flow of fluid can now be calculated by an ordinaryengineering calculator and thus enabling suitable welding parameters to be determined.The magnitude of kPLf , was established by regression analysis of results from aparametric finite element analysis series of a total number of 112 numerical simulations.Furthermore, the result of the regression analysis was validated and verified by a weldingexperiment series accomplished on an in-house designed and constructed in-servicewelding rig. The principle design of the welding rig as well as its instrumentation, a PCbased Data Acquisition system, is described. In addition, a method to measure the weldmetals cooling time tT1 /T2 by means of thermocouple elements is described. Finally,the algorithm presented in this study proved feasible for industrial in-service weldingoperations of fine-grained Carbon and Carbon–Manganese steels with a maximum CarbonEquivalent (IIW) (CE) of 0.32.

sted, utgiver, år, opplag, sider
2009. Vol. 131, nr 3, s. 1-6, artikkel-id 031304
Emneord [en]
Flow (Dynamics), Heat, Heat transfer, Cooling, Fluids, Steel, Welding, Thermal conductivity, Finite element analysis, Equations, Regression analysis, Thickness
HSV kategori
Forskningsprogram
Sjöfart, Sjöfartsvetenskap
Identifikatorer
URN: urn:nbn:se:lnu:diva-61979DOI: 10.1115/1.3124126OAI: oai:DiVA.org:lnu-61979DiVA, id: diva2:1085892
Prosjekter
FunktionsstabilitetTilgjengelig fra: 2017-03-30 Laget: 2017-03-30 Sist oppdatert: 2017-11-29bibliografisk kontrollert
Inngår i avhandling
1. Heat Transfer Prediction of In Service Welding in a Forced Flow of Fluid
Åpne denne publikasjonen i ny fane eller vindu >>Heat Transfer Prediction of In Service Welding in a Forced Flow of Fluid
2005 (engelsk)Licentiatavhandling, med artikler (Annet vitenskapelig)
Abstract [en]

An algorithm for heat transfer prediction of in-service welding operations in a forcedflow of fluid is presented. The algorithm presented is derived from Rosenthal’s 3D heatflow equation and boundary layer approximations. This was possible by the introductionof an apparent thermal conductivity kPL, which is a function of the boundary layer’s heattransfer coefficient f and the base material’s thickness . This implies that a weldcooling time ΔtT1 /T2 in a forced flow of fluid can now be calculated by an ordinaryengineering calculator and thus enabling suitable welding parameters to be determined.The magnitude of kPLf , was established by regression analysis of results from aparametric finite element analysis series of a total number of 112 numerical simulations.Furthermore, the result of the regression analysis was validated and verified by a weldingexperiment series accomplished on an in-house designed and constructed in-servicewelding rig. The principle design of the welding rig as well as its instrumentation, a PCbased Data Acquisition system, is described. In addition, a method to measure the weldmetals cooling time ΔtT1 /T2 by means of thermocouple elements is described. Finally,the algorithm presented in this study proved feasible for industrial in-service weldingoperations of fine-grained Carbon and Carbon–Manganese steels with a maximum Carbon Equivalent (IIW) (CE) of 0.32.

sted, utgiver, år, opplag, sider
Gothenburg: Chalmers Univeristy of Technology, Department of Shipping and Marine Technology, 2005. s. 27
Serie
Chalmers Univeristy of Technology, Department of Shipping and Marine Technology, ISSN 1101-0614 ; R-05:91
HSV kategori
Forskningsprogram
Sjöfart, Sjöfartsvetenskap
Identifikatorer
urn:nbn:se:lnu:diva-62012 (URN)
Opponent
Prosjekter
Funktionsstabilitet
Tilgjengelig fra: 2017-04-10 Laget: 2017-03-31 Sist oppdatert: 2017-04-10bibliografisk kontrollert

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