Simulation of instantaneous heat transfer in spark ignition internal combustion engines: unsteady thermal boundary layer modeling
Article
Article Title | Simulation of instantaneous heat transfer in spark ignition internal combustion engines: unsteady thermal boundary layer modeling |
---|---|
ERA Journal ID | 3684 |
Article Category | Article |
Authors | Buttsworth, David R. (Author), Agrira, Abdalla (Author), Malpress, Ray (Author) and Yusaf, Talal (Author) |
Journal Title | Journal of Engineering for Gas Turbines and Power: Transactions of the ASME |
Journal Citation | 133 (2), pp. 1-5 |
Number of Pages | 5 |
Year | 2011 |
Publisher | American Society of Mechanical Engineers (ASME) |
Place of Publication | United States |
ISSN | 0742-4795 |
1528-8919 | |
Digital Object Identifier (DOI) | https://doi.org/10.1115/1.4001080 |
Abstract | Simulation of internal combustion engine heat transfer using low-dimensional thermodynamic modeling often relies on quasisteady heat transfer correlations. However, unsteady thermal boundary layer modeling 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 modeling appear to imply that it is necessary to adopt the restrictive assumption that isentropic processes occur in the gas external to the thermal boundary layer. Such restrictions are not required and we have investigated if unsteady modeling can improve the simulation of crank-resolved heat transfer. A modest degree of success is reported for the present modeling, which relies on a constant effective turbulent thermal conductivity. Improvement in the unsteady thermal boundary layer simulations is expected in the future when the temporal and spatial variations in effective turbulent conductivity are correctly modeled. |
Keywords | boundary layer turbulence; heat transfer; ignition; internal combustion engines; sparks; thermal conductivity; thermodynamics |
ANZSRC Field of Research 2020 | 401213. Turbulent flows |
400201. Automotive combustion and fuel engineering | |
401204. Computational methods in fluid flow, heat and mass transfer (incl. computational fluid dynamics) | |
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 | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q0q07/simulation-of-instantaneous-heat-transfer-in-spark-ignition-internal-combustion-engines-unsteady-thermal-boundary-layer-modeling
2131
total views9
total downloads0
views this month0
downloads this month