POLISH ACADEMY of SCIENCES
TECHNICAL SCIENCES
Disasters, micro and nanomechanics
| BULLETIN
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POLISH ACADEMY of SCIENCES TECHNICAL SCIENCES |
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| Volume
57, Issue 1, March 2009
Disasters, micro and nanomechanics |
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| Issue Index | Authors Index | Scope Index | Web Info | |
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| Aims&Scope, Subscription | Editors | Authors' guide | to read PDF files | mirror: http://fluid.ippt.gov.pl/~bulletin/ |
| pp 87 - 94 |
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Application of Duhamel's theorem in the thermal field analysis of a DC cable with two layers of insulation |
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| J. GOLEBIOWSKI and M. ZAREBA |
| In the paper we presented an asymptotic method of determination of the transient thermal field in a three-zone cable (i.e. in a core and in two layers of insulation). A basis of our method was decomposition of the system. We considered separately the region of the core, which we modelled by a concentrated element of the first order. In turn, we treated the two-zone region of insulation as the system of distributed parameters. In the analysis we applied Duhamel's theorem and the method of separation of variables. Eigenvalues of the boundary-initial problem and coefficients of eigenfunctions we determined numerically. In the result we obtained spatial-temporal heat-up curves of the investigated cable. Our results we presented in a graphic form. |
| Key words: |
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analytical-numerical methods of the field theory, transient heat flow, current transmission. |
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| Aims&Scope, Subscription | Editors | Authors' guide | to read PDF files |
| Copyright
® Bulletin of the Polish Academy of Sciences: Technical Sciences
12 March 2009 |
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