Lola’s 50%-scale moving ground plane wind tunnel is renowned in the industry for delivering results with outstanding correlation to on-track aerodynamic performance. Wind speeds of up to 65m/sec (145mph) are generated by the tunnel’s unique Lola-developed composite fan blades. Automated model controls allow a wide range of pitch, roll, and yaw attitudes to be evaluated. Clients also benefit from a fully-computerised private control room and complete modelmaking shop.
The test section accommodates 50% models for maximum accuracy .A combination of flow conditioning screens and high contraction ratio provides turbulence control second to none for a wind tunnel of this size and type, yielding superior quality, accuracy, and repeatability of results.
The high top wind speed yields test results with excellent correlation to full-size performance. Heat generated by the main fan is dissipated through a large heat exchanger positioned in the air stream and a 520kW chiller unit, preventing temperature build-up and ‘hot spots ’.
A six-component overhead balance is at the hear t of the wind tunnel’s data gathering system. It facilitates precise measurement of lift, drag, and lateral forces, along with their associated moments of yaw, roll, and pitch. The balance is mounted on an independent piled foundation to eliminate the influence of external vibrations. Accuracy is maintained by a self-correcting calibration system.
Control of the model’s attitude is fully computerised, with adjustability during runs including yaw and roll plus front wheel steering up t o ±1 0°. A unique feature of the system is the ability to change the wheelbase and track from the control room, increasing the flexibility and productivity of testing.
Rolling Road Control
The entire rolling road section can be yawed with, or separately from, the model to simulate the aerodynamic effects of slip angles and crosswinds. This data is especially useful for vehicles with less do wind force and/or more frontal area, such as touring cars.
Lola proprietary software, with data handling configured for easy and rapid interfacing with customers’ own data reporting and analysis software controls the wind tunnel. Multiple backup systems ensure continuity of operation and availability of results.
- Maximum model scale - Typically 50% for open wheel
- Maximum model elevation - 600 millimetre gap above rolling road surface
- Maximum wind speed - 65metres/second (145mph)
- Maximum road speed - 80 metres/second
- Turbulence intensity - <0.08%
- Average wind temperature - 20º (70ºF)
- Wind temperature stability - < 1º during test
- Rolling road temperature - 14ºC (58ºF) ±0.5 ºC
- Test section configuration - 2.70 metres wide x 2.47 metres high
- Diffuser configuration - 7:1 contraction ratio
- F an configuration Lola-designed and built 5-blade carbon composite unit
- Main fan drive motor - 650kW (872hp)
- Overhead balance 6-component unit with accuracy >0.04% of range
- Model attitude control - Pitch, heave, roll, yaw, wheel steering
- Rolling road area - 2.0 metres wide x 4.0 metres long
- Rolling road motor - 200 kW (268hp)
- Rolling road yaw angle - ±10º
- Rolling road sensors - 4 pressure and 4 temperature