Upstream wind tunnel model mounting: The forgotten method for road vehicle aerodynamics
| Autor: | Aleksandra Anna Rejniak, Alvin Gatto |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
road vehicle
Mechanical Engineering Aerospace Engineering 02 engineering and technology Aerodynamics upstream model mounting 01 natural sciences moving ground 010305 fluids & plasmas front sting Sting 020303 mechanical engineering & transports 0203 mechanical engineering 0103 physical sciences wind tunnel testing Upstream (networking) model support Geology Front (military) Wind tunnel Marine engineering |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering. 235:1992-2012 |
| ISSN: | 2041-2991 0954-4070 |
| Popis: | 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. Engineering and Physical Sciences Research Council (Doctoral Training Program). |
| Databáze: | OpenAIRE |
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