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Measuring of Long Truck Models in a Wind Tunnel with External Balance
Technical Paper
2008-01-1202
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
An existing wind tunnel setup for measuring full scale automobiles with an external under floor balance is modified for accepting a long articulated six-axle truck models of 50% scale. These exceed by far the dimensions of the existing wheel supporting pads. The tests require the measurement of all six force and moment components at yaw angles up to 16°. Therefore, the front of the truck model extending beyond the ordinary test section is supported with instrumented air bearings under the wheels. In this manner friction forces altering the drag and side force measurements of the balance are reduced to a minimum.
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Citation
Monkewitz, M. and Müller, J., "Measuring of Long Truck Models in a Wind Tunnel with External Balance," SAE Technical Paper 2008-01-1202, 2008, https://doi.org/10.4271/2008-01-1202.Also In
References
- Hackett, J. E. Sampath, S. Phillips, C.G. “Determination of Wind Tunnel Constraint Effects by a Unified Wall Pressure Signature Method” NASA CR-166 186 1981
- SAE J1252 July 1981 Wind Tunnel Test Procedure for Trucks and Buses
- SAE / SP96 / 1176 Closed-Test-Section Wind Tunnel Blockage Corrections for Road Vehicles