Evaluation of different heat transfer conditions on an automotive turbocharger
2014 (English)In: International Journal of Engine Research, ISSN 1468-0874, Vol. 16, no 2, 137-151 p.Article in journal (Refereed) Published
This paper presents a combination of theoretical and experimental investigations for determining the main heat fluxes within a turbocharger. These investigations consider several engine speeds and loads as well as different methods of conduction, convection, and radiation heat transfer on the turbocharger. A one-dimensional heat transfer model of the turbocharger has been developed in combination with simulation of a turbocharged engine that includes the heat transfer of the turbocharger. Both the heat transfer model and the simulation were validated against experimental measurements. Various methods were compared for calculating heat transfer from the external surfaces of the turbocharger, and one new method was suggested.
The effects of different heat transfer conditions were studied on the heat fluxes of the turbocharger using experimental techniques. The different heat transfer conditions on the turbocharger created dissimilar temperature gradients across the turbocharger. The results show that changing the convection heat transfer condition around the turbocharger affects the heat fluxes more noticeably than changing the radiation and conduction heat transfer conditions. Moreover, the internal heat transfers from the turbine to the bearing housing and from the bearing housing to the compressor are significant, but there is an order of magnitude difference between these heat transfer rates.
Place, publisher, year, edition, pages
Sage Publications, 2014. Vol. 16, no 2, 137-151 p.
Turbocharger, Heat transfer, On-engine turbocharger, Heat flux, Convection
Applied Mechanics Energy Engineering Vehicle Engineering
IdentifiersURN: urn:nbn:se:kth:diva-143535DOI: 10.1177/1468087414524755ISI: 000349225300002ScopusID: 2-s2.0-84921873306OAI: oai:DiVA.org:kth-143535DiVA: diva2:707029
FunderSwedish Energy Agency
QC 201409232014-03-242014-03-242015-03-10Bibliographically approved