Wind Tunnel testing
Aerodynamic and Aeroacoustic Excellence
PININFARINA WIND TUNNEL
The Pininfarina Wind Tunnel represents a state of the art strategic tool for automotive OEMs to achieve high-level standard in vehicles performance, energy consumptions and overall comfort through aerodynamic and aeroacoustics testing and validation.
The Center is active in the aerodynamic and aeroacoustics field, mainly on full-scale passenger cars.
WIND TUNNEL ACTIVITIES
The Pininfarina Wind Tunnel support the realization of aerodynamic vehicles sculpted by the wind. The Ground Effect Simulation System reproduces the real vehicle motion conditions, while the Turbulence Generation System, creates different conditions of controlled turbulence flow, as ambient wind, first phase and overtaking, and wind gust.
Ground Effect Simulation System
Through four rollers and three mats, one central and two placed in front of the front wheels (T-belt), the GESS system (Ground Effect Simulation System) allows the wheels of the car and the ground to move at the same wind speed. This system was developed to make the tunnel test conditions as faithful as possible to the road conditions, above all in order to be able to analyze the flows below the car, which in the case of soil and fixed wheels would be qualitatively different from the real ones.
Turbulence Generation System
Through a computerized system, it is possible to control the movement of five pairs of wings placed inside the nozzle to obtain different turbulence conditions in the test chamber. The TGS (Turbulence Generation System) allows simulating different atmospheric turbulence intensities by reproducing the Von Karman spectrum over the entire frequency range. It is also possible to simulate side wind gusts, driving conditions in the wake of another vehicle and overtaking.
- The maximum wind speed, 250 kph
- The moving ground (T-Belt) / Wheels drive system 250kph
- Turbulence flow in laminar condition < 0.74%
- 3D PIV
Aeroacoustics tests are becoming a fundamental element to guarantee the maximum driving comfort, particularly for Hybrid and Battery Electrical vehicles. The Wind Tunnel is equipped with three external microphones array’s (Ceiling, Side and Front) and internal Sphera array with many cameras capable of measuring both internal and external noises, helping to identify the source of noise and consequent definition of countermeasures. Noise Vision and Beam Forming support results visualization. In addition, the structure is also equipped with four acoustic dummies for internal acoustic comfort evaluation.
WIND TUNNEL APPLICATIONS OUTSIDE AUTOMOTIVE
The Pininfarina Wind Tunnel provides state of the art strategic services also outside of the automotive sector. For example, in architecture the Pininfarina Wind Tunnel studies the response of wind exposure affecting buildings and infrastructures through scale models.
Distinctive shapes or features and excessive vibration may result from unexpected wind pressure jeopardizing structural reliability or creating noise sources. Therefore, the Pininfarina Wind Tunnel runs aerodynamic and aeroacoustics tests to identify and solve potential pain points, guaranteeing maximum levels of structural performance and noise comfort.
The Wind Tunnel is proved to be a powerful tool for testing ad developing products across different fields. Some examples include, but are not limited to, aircrafts, high-speed trains, yachts, cooling towers, wind engineering, industrial design and sporting goods.
AERODYNAMICS AND AEROACUSTICS OF VEICHLES
- PASSENGER CARS
- RACING CARS
- LOW-DRAG RESEARCH CARS
- TWO WHEELS VEHICLES
- AIRCRAFTS (scale models)
- INDUSTRIAL VEHICLES
- HIGH-SPEED TRAINS (scale models)
- COMPONENTS (open roofs, soft-tops, internal flows, radiators, ski-racks..)
WIND ENGINEERING, SPORT AND OTHER
- INDUSTRIAL FACILITIES
- BRIDGES (scale models)
- SPORT GOODS
- SPORT CHAMPIONS
WIND TUNNEL IMPACT AND VALUE
PERFORMANCE AND COMFORT
Regardless for the industry considered, the buyer decision process is strongly affected by two variables: Performance and Comfort. From this perspective, the Pininfarina Wind Tunnel supports the enhancement of products quality with the goal of reaching a standard capable of fulfilling customer expectations.
IMPROVE CAR CONSUMTIONS
- Optimization of aerodynamic coesfficients ( Cd; Lift ….)
- WLTP compliant
The Pininfarina Wind Tunnel is follow the more strict standards of confidentiality. Each client’s sensible information is protected by a NDA (non disclosure agreement), every local of our facility is badge protected, and network acquisition and storage is protected by password and isolated from external world. With all these features Pininfarina creates the conditions to offer a complete turnkey testing process while granting high levels of confidentiality.
Do you want to create something together?Contacts
Dimensions of the facility – Test Section
- Plenum Length = 13.30 m
- Jet Length = 8.00 m
- Width B = 9.60 m
- Height H = 4.20 m
- Balance reference center X/L = 0.46
- Jet frontal area An = 11 m2 (Semi-circular shape)
- Width Wn = 4.84 m
- Height Hn = 2.82 m
- Contraction ratio = 6.9:1
Drive system – Main Fan
- DC Motor Power = 1.1 MW
- Fan Diameter = 4.88 m
- Number of Blades = 29
Drive system – 13 Fans
- DC Motor Power (tot) = 2,2 MW
- Fan Diameter = 1.8 m
- Number of Blades = 13
- Max Wind Speed Vw = 70 m/s (250 Km/h)
- Velocity uniformity dV / Vw < ± 0.5 %
- Turbulence level = 0.3%
Mean flow angles
- vertically a = 0.0°
- horizontally a = 0.0°
Max local flow angles
- vertically a = ± 0.5°
- horizontally a = ± 0.5°
Boundary layer displacement thickness, at the balance center and V=140 Km/h:
- static floor d* = 11.2 mm
- moving floor d* = -0.1 mm
Aeroacoustic characteristics. Noise Level measured in the Test Section Plenum, out of the jet, at x=balance center
- SPL (Aw) = 68 dB(A) at V = 100 Km/h70
- SPL (Aw) = 78 dB(A) at V = 140 Km/h80
Ground Effect Simulation System
Allows to put in rotation the wheels of the vehicle and to simulate the motion of the ground under the car.
Turbulence Generation System
To produce on demand a flow of controlled turbulence… similar to that on the road.
The Wind Tunnel includes three independent and separated boxes in order to guarantee wind tunnel users the highest level of confidentiality for their tests. These reserved areas are used for the preparation of the cars before the tests and for the safe storage of the cars before and after the tests.
- Forces Measurement: Balance
- Pressure Probes:14-hole Probe
- Pressure system (CHELL multipressure scanner)
- Pressure Probes: Cobra Probe
- Pressure Probes: Microdaq
- Laser Probes: Piv (possible, must be planned)
- Anemometer Probes: Hot-wire
- Anemometer Probes: Mini Air
- Anemometer Probes: Glue On
- Anemometer Probes: The Brake Disk Cooling
- Anemometer Probes: Test Radiator
- Measures Of Deformation: Balloning
- Measures Of Deformation/vibration: Auto Bonnet
- Acoustic Comfort: Interior Noise
- Acoustic Comfort: Exterior Noise
- Acoustic Comfort: Comfort Helmet
- Acoustic Comfort: Beamforming 2d/3d
- Three Microphones array’s (cieling, side and front): Exterior Noise
- Four Acoustic Heads: Interior Noise