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Title: | Upstream wind tunnel model mounting: The forgotten method for road vehicle aerodynamics |
Authors: | Rejniak, AA Gatto, A |
Keywords: | upstream model mounting;front sting;model support;wind tunnel testing;moving ground;road vehicle |
Issue Date: | 14-Dec-2020 |
Publisher: | SAGE Publications on behalf of IMechE |
Citation: | Rejniak, A.A. and Gatto, A. (2021) 'Upstream wind tunnel model mounting: The forgotten method for road vehicle aerodynamics', Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 235 (7), pp. 1992 - 2012. doi: 10.1177/0954407020978017. |
Abstract: | Copyright © IMechE 2020. A new method for supporting ground vehicle wind tunnel models is proposed. The technique employs a centrally mounted sting connecting the front face of the vehicle, adjacent to the floor, to a fixed point further upstream. Experiments were conducted on a 1/24th-scale model, representative of a Heavy Goods Vehicle, at a width-based Reynolds number of 2.3 × 105, with detailed comparisons made to more established support methodologies. Changes to mean drag coefficients, base pressures and wake velocities are all evaluated and assessed from both time-independent and time-dependent perspectives, with a particular focus within the wake region. Results show subtle changes in drag coefficient, together with discrete modifications to the flow-field, dependent on the method adopted. Subtle differences in base pressures and wake formation are also identified, with mounting the model upstream found to demonstrate retention of many of the beneficial effects of other techniques without suffering their deficiencies. Overall, these results identify the upstream mounting methodology as a viable alternative to currently available and more well-established techniques used to facilitate wind tunnel aerodynamic interrogation. |
URI: | https://bura.brunel.ac.uk/handle/2438/25608 |
DOI: | https://doi.org/10.1177/0954407020978017 |
ISSN: | 0954-4070 |
Other Identifiers: | ORCID iDs: Aleksandra Anna Rejniak https://orcid.org/0000-0002-2685-2450; Alvin Gatto https://orcid.org/0000-0003-4443-0451. |
Appears in Collections: | Dept of Mechanical and Aerospace Engineering Research Papers |
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