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University of Birmingham

The Transient Aerodynamic Investigation (TRAIN) rig is a purpose built facility for measuring the aerodynamics of scale moving model vehicles. The unique facility offers the flexibility to conduct a range of experiments crucial to a detailed understanding of vehicle aerodynamic flows. In broad terms, it consists of a 150m long track along which model vehicles can be propelled, in both directions, at speeds of up to 80 m/s. The facility can be used for all types of ground vehicle aerodynamic investigations, but it could also be used for a wide variety of other aerodynamic investigations.

Test Section 1 size:
The overall length of the facility is 150 m with a 50 m long test section.
1/25th for rail vehicle testing, but larger road vehicle models can be used up to 1/10th scale.
Test Section 2 (Return) size:
Operational Status:
Low Speed, Train rig
Mach Number: N/a
Maximum Flow Speed: Model speed - up to 80 m/s.
Propulsion system – two rubber catapults, one at each end of the rig.
Reynolds No: N/a
Total Pressure: N/a
Pressure: N/a
Testing Capabilities:
Model Support: Track systems - three tracks are provided, two at the standard British railway system track spacing scaled to 1/25th and a third at a wider spacing.
Vehicles capable of firing in opposite directions simultaneously and crossing.
Outputs: A wide range of pressure transducers and velocity measuring probes of different sensitivities and types are available for measurements.
Robust on-board measuring systems to directly measure effects on vehicles.
Flow visualisation: Particle Image Velocimetry (PIV) systems available to conduct 3-D volumetric measurements.
Specialist Rigs:
A 15 m long crosswind flow facility is provided adjacent to the test section to permit tests to be carried out on the effects of winds on vehicles and the influence of winds on vehicle slipstream flows.