Characterisation of the wake of the DrivAer estate vehicle

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Abstract

To date, little information has been published on the time-averaged wake of the estate variant of the DrivAer vehicle type. In recent years, this generic automobile geometry has been put forward as a more realistic alternative to investigate vehicle aerodynamics than considerably more idealised geometries, such as the Ahmed body. In this paper, the time-averaged wake is experimentally investigated through wind-tunnel tests. Velocities maps and profiles, drag-force measurements and base pressure distributions are used to characterise and quantify the flow behind and around the vehicle. In particular, the combination of wake-velocity and base-pressure measurements provide insight into the wake behind an estate vehicle. The results indicate the near wake and base-pressure distribution is dominated by up-wash caused by flow exiting the smooth underbody diffuser.

Original languageEnglish
Pages (from-to)242-259
Number of pages18
JournalJournal of Wind Engineering and Industrial Aerodynamics
Volume177
DOIs
Publication statusPublished - 1 Jun 2018

Keywords

  • Automotive aerodynamics
  • Bluff body
  • Wake
  • Wind tunnel

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