Turbocharged SI-Engine Simulation with Cold and Hot-Measured Turbocharger Performance Maps
2012 (English)In: Proceedings of ASME Turbo Expo 2012, Vol 5, ASME Press, 2012, 671-679 p.Conference paper (Refereed)
Heat transfer within the turbocharger is an issue in engine simulation based on zero and one-dimensional gas dynamics. Turbocharged engine simulation is often done without taking into account the heat transfer in the turbocharger. In the simulation, using multipliers is the common way of adjusting turbocharger speed and parameters downstream of the compressor and upstream of the turbine. However, they do not represent the physical reality. The multipliers change the maps and need often to be different for different load points. The aim of this paper is to simulate a turbocharged engine and also consider heat transfer in the turbocharger. To be able to consider heat transfer in the turbine and compressor, heat is transferred from the turbine volute and into the compressor scroll. Additionally, the engine simulation was done by using two different turbocharger performance maps of a turbocharger measured under cold and hot conditions. The turbine inlet temperatures were 100 and 600°C, respectively. The turbocharged engine experiment was performed on a water-oil-cooled turbocharger (closed waste-gate), which was installed on a 2-liter gasoline direct-injected engine with variable valve timing, for different load points of the engine. In the work described in this paper, the difference between cold and hot-measured turbocharger performance maps is discussed and the quantified heat transfers from the turbine and to/from the compressor are interpreted and related to the maps.
Place, publisher, year, edition, pages
ASME Press, 2012. 671-679 p.
Turbocharger, Heat transfer, Performance Map, Turbocharged Engine
Energy Engineering Aerospace Engineering Vehicle Engineering Applied Mechanics
IdentifiersURN: urn:nbn:se:kth:diva-70231DOI: 10.1115/GT2012-68758ISI: 000324956100070ScopusID: 2-s2.0-84881241280ISBN: 978-079184471-7OAI: oai:DiVA.org:kth-70231DiVA: diva2:486114
ASME Turbo Expo 2012: Turbine Technical Conference and Exposition, GT 2012; Copenhagen; Denmark; 11 June 2012 through 15 June 2012
ProjectsOn-Engine Turbocharger Performance
QC 201311062012-03-092012-01-302014-10-01Bibliographically approved