Simulation of instantaneous heat transfer in spark ignition internal combustion engines: unsteady thermal boundary layer modeling

Buttsworth, David R. and Agrira, Abdalla and Malpress, Ray and Yusaf, Talal (2011) Simulation of instantaneous heat transfer in spark ignition internal combustion engines: unsteady thermal boundary layer modeling. Journal of Engineering for Gas Turbines and Power , 133 (2). pp. 1-5. ISSN 0742-4795

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.


Statistics for USQ ePrint 18844
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to paper due to publisher copyright restrictions.
Depositing User: Dr Talal Yusaf
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 07 Apr 2011 02:17
Last Modified: 03 Jul 2013 00:36
Uncontrolled Keywords: boundary layer turbulence; heat transfer; ignition; internal combustion engines; sparks; thermal conductivity; thermodynamics
Fields of Research (FOR2008): 09 Engineering > 0915 Interdisciplinary Engineering > 091508 Turbulent Flows
09 Engineering > 0902 Automotive Engineering > 090201 Automotive Combustion and Fuel Engineering (incl. Alternative/Renewable Fuels)
09 Engineering > 0915 Interdisciplinary Engineering > 091502 Computational Heat Transfer
Socio-Economic Objective (SEO2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: doi: 10.1115/1.4001080
URI: http://eprints.usq.edu.au/id/eprint/18844

Actions (login required)

View Item Archive Repository Staff Only