MyJournals Home  

RSS FeedsEnergies, Vol. 12, Pages 4575: Flow Angularity Investigations in an Automotive Slotted Wall Wind Tunnel (Energies)

 
 

30 november 2019 17:00:11

 
Energies, Vol. 12, Pages 4575: Flow Angularity Investigations in an Automotive Slotted Wall Wind Tunnel (Energies)
 


The Volvo Cars aerodynamic wind tunnel has had a vortical flow angularity pattern in the test section since its original commissioning in 1986. The vortical flow nature persisted after an upgrade in 2006, when the fan was replaced and a moving ground system was introduced. It has been hypothesized that the cause for this flow angularity pattern was leakages around the heat exchanger installed in the settling chamber. The present paper tests this hypothesis by measuring the flow angularity in the test section before and after sealing the leakages. The findings show that the leakage path around the heat exchanger does not influence the flow angularity, and that the current pattern is different compared to the commissioning after the upgrade. This prompted an investigation of the influence from the turbulence screens, which were changed after the upgrade commissioning. These investigations indicate that the probable cause of the vortical flow angularity pattern is residual swirl from the fan. Force measurements on a reference car with and without extra induced flow angularity show that the flow angles measured in the tunnel for regular operation are most likely small enough to not have a significant effect on the measured aerodynamic forces.


 
246 viewsCategory: Biophysics, Biotechnology, Physics
 
Energies, Vol. 12, Pages 4576: Variable Renewable Energy and Market Design: New Products and a Real-World Study (Energies)
Energies, Vol. 12, Pages 4581: Analyzing Oil Price Shocks and Exchange Rates Movements in Korea using Markov Regime-Switching Models (Energies)
 
 
blog comments powered by Disqus


MyJournals.org
The latest issues of all your favorite science journals on one page

Username:
Password:

Register | Retrieve

Search:

Physics


Copyright © 2008 - 2024 Indigonet Services B.V.. Contact: Tim Hulsen. Read here our privacy notice.
Other websites of Indigonet Services B.V.: Nieuws Vacatures News Tweets Nachrichten