Browse Publications Technical Papers 2018-28-0024
2018-07-09

Investigation on Underhood Airflow Management - Effect of Airflow Statistics 2018-28-0024

The objective of this work is to examine the suitability of cooling airflow non-uniformity on radiator frontal surface as a factor to evaluate three attributes: airflow distribution, front fascia geometry and deterioration in heat rejection. In literature, the effect of front end design is investigated by evaluating the volume of cooling airflow passing through the radiator and cooling drag of a vehicle. In this study, it was demonstrated that airflow distribution on radiator frontal surface can also be considered as one of the parameters while choosing the front-end design. Using the basic equations for modeling the cooling airflow through a front-end opening, CFD approach is developed to quantify the airflow distribution over the heat exchanger(radiator) as a function of flow statistics of the upstream cooling air. Further, this work is extended to study the impact of airflow non-uniformity on the thermal performance of radiator using the empirical equation available in literature. The airflow non-uniformity was found to be sensitive to changes in the geometry of fascia particularly around the upper cooling inlet. This study reveals a vehicle level system trade-off between grille opening, cooling air mass flow rate and non-uniformity at design stage itself. The interpretations of this work can serve as a design guideline for the thermal system and styling engineers of automotive domain.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Cooling Fan Modeling to Support Robust AC/Cooling System Simulation

2005-01-1905

View Details

TECHNICAL PAPER

Viscous Fan Drive Model for Robust Cooling Air Flow Simulation

2007-01-0595

View Details

TECHNICAL PAPER

Improvement of Engine Cooling Performance for a Construction Truck using Numerical and Experimental Methods

2010-01-2054

View Details

X