Simulation of instantaneous heat transfer in spark ignition internal combustion engines: unsteady thermal boundary layer modelling
Paper
Paper/Presentation Title | Simulation of instantaneous heat transfer in spark ignition internal combustion engines: unsteady thermal boundary layer modelling |
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Presentation Type | Paper |
Authors | Buttsworth, David R. (Author), Agrira, Abdalla (Author), Malpress, Ray (Author) and Yusaf, Talal (Author) |
Editors | Callahan, Tim |
Journal or Proceedings Title | Proceedings of the ASME Internal Combustion Engine Division Fall Technical Conference (ICEF 2009) |
Number of Pages | 7 |
Year | 2009 |
Place of Publication | United States |
ISBN | 9780791843635 |
9780791838587 | |
Digital Object Identifier (DOI) | https://doi.org/10.1115/ICEF2009-14056 |
Web Address (URL) of Paper | https://asmedigitalcollection.asme.org/gasturbinespower/article-abstract/133/2/022802/456169/Simulation-of-Instantaneous-Heat-Transfer-in-Spark |
Conference/Event | ASME Internal Combustion Engine Division Fall Technical Conference (ICEF 2009) |
Event Details | ASME Internal Combustion Engine Division Fall Technical Conference (ICEF 2009) Event Date 27 to end of 30 Sep 2009 Event Location Lucerne, Switzerland |
Abstract | Simulation of internal combustion engine heat transfer using low-dimensional thermodynamic modelling often relies on quasi-steady heat transfer correlations. However, unsteady thermal boundary layer modelling could make a useful contribution because of the inherent unsteadiness of the internal combustion engine environment. Previous formulations of the unsteady energy equations for internal combustion engine thermal boundary layer modelling appear to imply that restrictive assumptions regarding isentropic processes applying in the gas external to the thermal boundary layer are necessary. Such restrictions are not required and we have investigated if unsteady modelling can improve the simulation of crank-resolved heat transfer. A modest degree of success is reported for the present modelling which relies on a constant effective turbulent thermal conductivity. Improvement in the unsteady thermal boundary layer simulations is expected in future when the temporal and spatial variation in effective turbulent conductivity is correctly modelled. |
Keywords | internal combustion engines; thermal boundary layer modelling; energy equation; heat transfer correlation; isentropic; quasi-steady; spark ignition; temporal and spatial variation; thermal boundary layer; thermodynamic modelling; turbulent conductivity; unsteady thermal boundary |
ANZSRC Field of Research 2020 | 400202. Automotive engineering materials |
400201. Automotive combustion and fuel engineering | |
401205. Experimental methods in fluid flow, heat and mass transfer | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Oxford, United Kingdom |
Department of Mechanical and Mechatronic Engineering | |
Computational Engineering and Science Research Centre |
https://research.usq.edu.au/item/9z494/simulation-of-instantaneous-heat-transfer-in-spark-ignition-internal-combustion-engines-unsteady-thermal-boundary-layer-modelling
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