Transient heat transfer modelling in automotive exhaust systems
- 1 January 1997
- journal article
- research article
- Published by SAGE Publications in Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
- Vol. 211 (1), 1-15
- https://doi.org/10.1243/0954406971521610
Abstract
Transient heat transfer computations in automotive exhaust systems are increasingly employed in the design and optimization phases. The complex geometry of the exhaust line and the special flow conditions complicate the problem of accurately estimating several important heat transfer parameters. This paper initially summarizes the current status of knowledge regarding heat transfer phenomena in automotive exhaust systems. A comprehensive transient computer model covering all exhaust piping configurations (single wall, double wall with air gap or insulation) is presented. A novel solution procedure is proposed, resulting in significant savings in processing time. Two-dimensional heat transfer in connecting flanges is also accounted for. The model is validated with the help of full-scale measurements on vehicles. Examples are presented, illustrating the application of the model in the comparative assessment of different exhaust configurations. In conjunction with existing models, which simulate the operation of three-way catalytic converters and of other exhaust gas after-treatment devices, the model can be integrated in a CAE (computer aided engineering) package for the support of exhaust system design optimization.Keywords
This publication has 15 references indexed in Scilit:
- Exhaust Transient Temperature ResponseSAE International Journal of Advances and Current Practices in Mobility, 1995
- PowerPlant Systems and the Role of CAE - Part 1 Exhaust SystemsSAE International Journal of Advances and Current Practices in Mobility, 1992
- Computer Modeling on Exhaust System Heat TransferSAE International Journal of Advances and Current Practices in Mobility, 1992
- Exhaust Temperature Response of Trap Oxidizer SystemsSAE International Journal of Advances and Current Practices in Mobility, 1990
- A Study of Free Convective Heat Transfer in a Horizontal Annulus With a Large Radii RatioJournal of Heat Transfer, 1985
- An experimental and analytical study of heat transfer in an engine exhaust portInternational Journal of Heat and Mass Transfer, 1981
- Correlating equations for laminar and turbulent free convection from a horizontal cylinderInternational Journal of Heat and Mass Transfer, 1975
- A Theoretical and Experimental Investigation of a Gas Dynamic Model for a Single Stage Reciprocating Compressor with Intake and Delivery Pipe SystemsJournal of Mechanical Engineering Science, 1972
- Thermal Entry for Low Reynolds Number Turbulent FlowJournal of Basic Engineering, 1969
- Heat Transfer and Pressure Drop of Liquids in TubesIndustrial & Engineering Chemistry, 1936