Article | Proceedings of the 12th International Modelica Conference, Prague, Czech Republic, May 15-17, 2017 | Improved Aerodynamic Prediction Through Coupled System and CFD Models
Göm menyn

Title:
Improved Aerodynamic Prediction Through Coupled System and CFD Models
Author:
Ed Tate: Exa, USA Joaquin Gargoloff: Exa, USA Brad Duncan: Exa, USA Hubertus Tummescheit: Modelon, USA John Griffin: Modelon, USA John Batteh: Modelon, USA
DOI:
10.3384/ecp1713247
Download:
Full text (pdf)
Year:
2017
Conference:
Proceedings of the 12th International Modelica Conference, Prague, Czech Republic, May 15-17, 2017
Issue:
132
Article no.:
004
Pages:
47-53
No. of pages:
7
Publication type:
Abstract and Fulltext
Published:
2017-07-04
ISBN:
978-91-7685-575-1
Series:
Linköping Electronic Conference Proceedings
ISSN (print):
1650-3686
ISSN (online):
1650-3740
Publisher:
Linköping University Electronic Press, Linköpings universitet


Export in BibTex, RIS or text

High accuracy predictions of aerodynamic forces using computational fluid dynamics requires accurate geometry. The aerodynamic forces on the vehicle body affects the vehicle posture or the vehicle position with respect to ground. When a vehicle is cruising, the change in vehicle posture is usually relatively small with respect to the size of a vehicle. However, these small changes in geometry can lead to significant correlation differences in drag and airflow structure. To address this issue, a coupled simulation approach was developed to predict vehicle posture in typical cruise and wind tunnel test conditions. This coupled approach was tested using PowerFLOW and Modelon’s Vehicle Dynamics Library (VDL). In this approach, the aerodynamic forces on the body are used to calculate the movement of the body and geometry. This modified geometry is then used to recalculate the operating aerodynamic forces. The modified geometry shows changes in total force, the distribution of forces, and the structure of the airflow over the vehicle. The results provided by correct geometry under load conditions offer better correlation to test and provide car makers with the improved accuracy to confidently improve real world fuel economy.

Keywords: aerodynamics vehicle suspension co-simulation FMI

Proceedings of the 12th International Modelica Conference, Prague, Czech Republic, May 15-17, 2017

Author:
Ed Tate, Joaquin Gargoloff, Brad Duncan, Hubertus Tummescheit, John Griffin, John Batteh
Title:
Improved Aerodynamic Prediction Through Coupled System and CFD Models
DOI:
http://dx.doi.org/10.3384/ecp1713247
References:

Andreasson, J., “The Vehicle Dynamics Library: New Concepts and New Fields of Application”, Proceedings of 8th International Modelica Conference, 2011.


Andreasson, J., Machida, N., Tsushima, M., Griffin, J., Sundström, P.: Deployment of high-fidelity vehicle models for accurate real-time simulation. Japanese Modelica Conference 2016, Tokyo, Japan, May 23-24, 2016.

Dassault Systemes, Velizy, France (2017) Dymola 2017 FD01. https://www.3ds.com/productsservices/catia/products/dymola/


Duncan BD, Fischer A, and Kandasamy S.: Validation of lattice-Boltzmann aerodynamics simulation for vehicle lift prediction. In: ASME 2010 3rd joint US‚ÄďEuropean fluids engineering summer meeting, 8th international conference on nanochannels, microchannels, and minichannels, Montreal, Quebec, Canada, 1‚Äď5 August 2010, ASME paper FEDSM-ICNMM2010-30891, pp. 2705‚Äď2716. New York: ASME.


Duncan B, Kandasamy S, Gau H, et al.: Aerodynamic performance assessment of BMW validation models using computational fluid dynamics. SAE paper 2012-01-0297, 2012.


Exa Corporation, Burlington, Mass, USA (2017) PowerFLOW. http://exa.com/en/product/simulationtools/
powerflow-cfd-simulation/


Griffin, J., Batteh, J., and Andreasson, J., “Modeling Vehicle Drivability with Modelica and the Vehicle Dynamics Library”, Proceedings of 9th International Modelica Conference, pp. 599-608, 2012.


Klomp, M., Sundström, P., Johnsson, A.: Real-Time Simulation of Elasto-kinematic Multi-body Vehicle Models. 13th International Symposium on Advanced Vehicle Control, Munich, Germany, pp. 255-260, Sep. 13-16, 2016.


Kotopati R, Keating A, Kandasamy S, et al.: The lattice-Boltzmann-VLES Method for automotive fluid dynamics simulation, a review. SAE paper 2009-26-057, 2009.


MODELISAR, Functional Mock-up Interface for Model Exchange, Version 1.0, 2010.


Modelon AB, Lund, Sweden. (2017). OPTIMICA Compiler Toolkit. http://www.modelon.com/products/optimicacompiler-toolkit/


Modelon AB, Lund, Sweden. (2017). Vehicle Dynamics Library. http://www.modelon.com/products/modelicalibraries/vehicle-dynamics-library/

Proceedings of the 12th International Modelica Conference, Prague, Czech Republic, May 15-17, 2017

Author:
Ed Tate, Joaquin Gargoloff, Brad Duncan, Hubertus Tummescheit, John Griffin, John Batteh
Title:
Improved Aerodynamic Prediction Through Coupled System and CFD Models
DOI:
http://dx.doi.org/10.3384/ecp1713247
Note: the following are taken directly from CrossRef
Citations:
No citations available at the moment


Responsible for this page: Peter Berkesand
Last updated: 2017-02-21