The Pininfarina Wind Tunnel is a precision tool for conducting aerodynamic tests. The constant introduction of cutting-edge technologies and methodologies allows for continupous improvement in th realism and accurancy of the measuremnets taken. For example, the relative movement of the ground plane to the vehicle is replicated using the Ground Effect Simulation System, greatly enhancing the accuracy of the underbody flow features. Furthermore, ambient wind, overtaking and wind gusts can be emulated with the Turbulence Generation System, allowing for aerodynamic and aeroacoustic analysis in realistic flows conditions. In addition to aerodynamic force measurements, the wind tunnel offers a gamut of measurement techniques capable of capturing cooling flows, pressure fields, vorticity and reverse flow regions.
Ground Effect Simulation System
The Ground Effect Simulation System (GESS) replicates the relative movement between the ground and a moving vehicle. The system consists of four rollers and three synchronized moving belts with the flow velocity. The three belts cover the width of the vehicle ahead of the front axle, with the central one running underneath the entire length of the vehicle. This configuration provides an excellent approximation of ground effect at the front of the vehicle, ideal for high-performance applications and motorsport.
Turbulence Generation System
The Turbulence Generation System (TGS) utilizes five pairs of flapping wings upstream of the vehicle to generate turbulence at frequencies across the entire Von Karman spectrum. A variety of flow conditions can be replicated by varying the flapping frequencies and phases of the TGS. Using this system, clients can attain aerodynamic and aeroacoustic measurements that more accurately represent real world conditions. The TGS is capable of reproducing:
• The wake of a downforce producing vehicle
• The wake of a lift producing vehicle
• Ambient wind conditions (High and low traffic)
• Initial phase of a vehicle overtaking manoeuvre,
• Continuous yaw angle variations
• Wind gust (frontal and lateral)
Flow Visualization and Measurement
Pininfarina offers a variety of flow visualization and measurement techniques gained over decades of research and development. The proprietary PF14 pressure probe can be used for the rapid measurement of velocity and pressure fields, vorticity and micro-drag along a plane yielding valuable information for the evaluation of a given flow field and correlation to CFD simulations. Pininfarina also offers optical methods such as 3D stereoscopic PIV, pressure-based methods, and vane anemometry methods for the measure of both external and cooling flows.