Strömningsmotstånd hos personbilar

The long term objective of the project is to increase the knowledge on how to design and optimize the rear part of a vehicle in order to obtain a lower drag coefficient. The project is a detailed experimental and numerical (CFD) study of the flow field around, underneath and behind passenger cars using a moving ground facilities. The idea behind the project is to use the momentum increase underneath the rear part of the vehicle for a reduction of the separated region behind the vehicle. To achive this, generic and real vehicles will be used together with introduction of active flow control of the flow phenomena. Due to the introduction of an optimized design and active control of the flow field in this area we estimate the drag reduction to be of the order of 10 %, meaning a reduction in fuel consumption for a SAAB 9-3 or 9-5 of 2-4 %. The project will also give a backgrond for more accurate full scale determination of the drag coefficient in full scale.

Participants

Lennart Löfdahl (contact)

Professor at Applied Mechanics, Vehicle Engineering and Autonomous Systems

Collaborations

Combitech

Linköping, Sweden

Innovatum

Trollhättan, Sweden

LeanNova Engineering

Trollhättan, Sweden

Saab AB

Bromma, Sweden

Funding

Swedish Energy Agency

Funding years 2009–2013

More information

Created

2015-02-26