Browse Publications Technical Papers 2002-01-1027
2002-03-04

Improving Truck Underhood Thermal Management Through CFD 2002-01-1027

The purpose of this paper is to describe a methodology that significantly enhances the process of truck underhood thermal management by utilizing state-of-the-art computer simulation of airflow and heat transfer. The traditional approach has been to package underhood components in the vehicle design phase based on past experience, build a prototype, test it, analyze the test results and determine any necessary design changes. The design changes are implemented and the cycle is repeated until an acceptable design is achieved. The alternative methodology, described in this paper, uses a complete 3-D CAD model of all pertinent underhood components of a heavy-duty truck with a general purpose Computational Fluid Dynamics (CFD) code to simulate underhood airflow. The heat exchangers were modeled using an approach that divides the heat exchanger core into cell zones and computes heat rejection cumulatively from zone to zone. As the cooling fan performance has a significant influence on airflow across the heat exchangers, the detailed geometry of the blades were considered in the fan model which was introduced in the overall computational domain using a multiple reference frame approach. These models were coupled together to provide an integrated methodology to assess the underhood airflow and heat transfer characteristics that can be applied both proactively - early in the design process - and reactively to analyze problems that occur with production vehicles. Results from the underhood simulation were compared to test data compiled during the development phase of a truck and are reported in this paper.

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

A Multi-Dimensional Approach to Truck Underhood Thermal Management

2001-01-2785

View Details

TECHNICAL PAPER

One-Dimensional Solar Heat Load Simulation Model for a Parked Car

2015-01-0356

View Details

TECHNICAL PAPER

CFD Simulation of Flow and Heat Transfer in Airways

2001-01-1712

View Details

X