Civil and Environmental Engineering Publications
AEROTHERMAL ANALYSIS OF VEHICLE THERMAL SOAK: TEMPERATURE AND HEAT-FLUX MEASUREMENTS
Document Type
Conference Proceeding
Publication Date
2014
Journal
PROCEEDINGS OF THE ASME FLUIDS ENGINEERING DIVISION SUMMER MEETING 2013
Volume
1C: SYMPOSIA
URL with Digital Object Identifier
https://doi.org/10.1115/FEDSM2013-16124
Abstract
This paper presents an experimental investigation of the underhood thermal behaviors during vehicle thermal soak (when the vehicle stops after a large thermal load) by temperature measurement and separate measurements of convective and radiative heat fluxes. Measurements are carried out on a passenger vehicle in wind tunnel S4 of Saint-Cyr-France. The underhood is instrumented by almost 120 surface and air thermocouples and 20 fluxmeters. Measurements are performed for three thermal functioning conditions, with the engine in operation and the front wheels positioned on the test facility with power-absorption controlled rollers. It was found that in thermal soak the temperature of certain components can increase by almost 80 degrees C (pre-catalyst screen) and that of air zones by almost 40 degrees C (crawl area).