HPC-LES for Unsteady Aerodynamics of a Heavy Duty Truck in Wind Gust - 1st report: Validation and Unsteady Flow Structures Hokkaido Univ

Format:

Conference/Event

Author/Creator:

Tsubokura, Tsubokura, author.

Contributor:

Ikenaga, Takeshi

Kitoh, Kozo

Matsuuki, Tomofuyu

Nakashima, Takuji

Takahashi, Kaito

Conference Name:

SAE 2010 World Congress & Exhibition (2010-04-13 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2010

Summary:

Large eddy simulation based on high-performance computing technique was conducted to investigate the unsteady aerodynamic forces acting on a full-scale heavy duty truck subjected to sudden crosswind. The CFD results were applied to evaluate the effect of the unsteady external forces on a vehicle motion, as a first step toward a more reliable vehicle motion analysis. As the first report, the numerical method was validated on the DNW wind-tunnel data by comparing the time-averaged drag and lateral forces at various yawing angles up to 10 degrees. Then the method was applied to the case when the vehicle goes through the crosswind region. The time series of the aerodynamic forces were acquired and discussed through the visualization of instantaneous flow structures around the vehicle. It was observed that drastic undershooting and overshooting of the yawing moment acts on the vehicle during the rushing in and out process. A simplified model was developed for the long-term motion analysis study to save the computational resources consumed to reproduce the detailed geometry

Notes:

Vendor supplied data

Publisher Number:

2010-01-1010

Access Restriction:

Restricted for use by site license