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Transient Modeling of Vehicle Under-hood and Underbody Component Temperatures

Journal Article
2016-01-0281
ISSN: 1946-3979, e-ISSN: 1946-3987
Published April 05, 2016 by SAE International in United States
Transient Modeling of Vehicle Under-hood and Underbody Component Temperatures
Sector:
Citation: El-Sharkawy, A., Arora, D., Hekal, A., Sami, A. et al., "Transient Modeling of Vehicle Under-hood and Underbody Component Temperatures," SAE Int. J. Mater. Manf. 9(2):330-337, 2016, https://doi.org/10.4271/2016-01-0281.
Language: English

Abstract:

In this paper, transient component temperatures for the vehicle under-hood and underbody are estimated. The main focus is on the component temperatures as a result of radiation from exhaust, convection by underbody or under-hood air and heat conduction through the components. The exhaust surface temperature is simulated as function of time and for various vehicle duty cycles such as city traffic, road load and grade driving conditions. At each time step the radiation flux to the surrounding component is estimated, heat addition or removal by convection is evaluated based on air flow, air temperature and component surface area.
Simulation results for under-hood and underbody components are compared against vehicle test data. The comparison shows very good agreement between simulated and measured component temperatures under both steady state and transient conditions.