Computational flow modeling of a simplified integrated tractor-trailer geometry.

McWherter-Payne, Mary Anna ; Salari, Kambiz (Lawrence Livermore National Laboratory, Livermore, CA)

Sandia National Laboratories

关键词: Navier-Stokes Equations;    Fuel Consumption;    Trucks;    Aerodynamics;    S Codes;   

DOI  :  10.2172/918359
RP-ID  :  SAND2003-3383
RP-ID  :  AC04-94AL85000
RP-ID  :  918359

美国|英语

来源: UNT Digital Library

【 摘 要 】

For several years, Sandia National Laboratories and Lawrence Livermore National Laboratory have been part of a consortium funded by the Department of Energy to improve fuel efficiency of heavy vehicles such as Class 8 trucks through aerodynamic drag reduction. The objective of this work is to demonstrate the feasibility of using the steady Reynolds-Averaged Navier-Stokes (RANS) approach to predict the flow field around heavy vehicles, with special emphasis on the base region of the trailer, and to compute the aerodynamic forces. In particular, Sandia's computational fluid dynamics code, SACCARA, was used to simulate the flow on a simplified model of a tractor-trailer vehicle. The results are presented and compared with NASA Ames experimental data to assess the predictive capability of RANS to model the flow field and predict the aerodynamic forces.