Update on the Pininfarina “Turbulence Generation System” and its effects on the Car Aerodynamics and Aeroacoustics
2004-01-0807
03/08/2004
- Event
- Content
- The Turbulence Generation System designed and built in Pininfarina in the years 1999-2002, has been in operation since the beginning of 2003. The purpose of this device is to reproduce in the wind tunnel a flow condition more similar to that found by the cars on the road, in terms of velocity profile and turbulence intensity/length scale.The paper reports an updated description of its mechanical and aerodynamic characteristics.Then it reports examples of results measured on some cars, in the condition of turbulent flow, regarding:
- Aerodynamics - time averaged and time-dependent aero coefficients.
- Aeroacoustics - auto spectra and psycho acoustic parameters.
- Deformation/vibration of some car body parts (bonnet, doors).
The differences between these results and those measured in standard low-turbulence conditions are presented.In addition a description of some techniques that are used for these time-dependent measurements is reported.
- Pages
- 25
- Citation
- Cogotti, A., "Update on the Pininfarina “Turbulence Generation System” and its effects on the Car Aerodynamics and Aeroacoustics," SAE Technical Paper 2004-01-0807, 2004, https://doi.org/10.4271/2004-01-0807.