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http://bura.brunel.ac.uk/handle/2438/18176
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DC Field | Value | Language |
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dc.contributor.author | Rejniak, AA | - |
dc.contributor.author | Gatto, A | - |
dc.date.accessioned | 2019-05-23T11:32:02Z | - |
dc.date.available | 2019-05-23T11:32:02Z | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | Journal of Applied Fluid Mechanics | en_US |
dc.identifier.issn | 1735-3572 | - |
dc.identifier.uri | http://bura.brunel.ac.uk/handle/2438/18176 | - |
dc.description.abstract | Minimising the aerodynamic drag of commercial vehicles is important economically and ecologically. This work demonstrates the effective use of lobed-mixing geometries, traditionally used to enhance flow mixing, as a viable, passive flow control method for reducing base pressure drag of boat-tailed ground vehicles. Experiments were performed on a 1/24th-scale Heavy Goods Vehicle representative model at a Reynolds number of 2.3 × 105 with force and hot-wire anemometry measurements used to quantify drag and wake characteristics. Tests on a baseline (no boat-tail), an unaltered boat-tail, and lobed-mixing configurations with varying pitch and height were compared. Overall, the baseline and unaltered boat-tail exhibited good correlation to previous results. This provided confidence in the methodology adopted. Results using lobed mixers showed up to a 10.2% drag reduction with the added vorticity produced acting to fundamentally shift the nature of the wake. This is manifested principally through the generation of counter-rotating vortical structures which enhance crosswise flow entrainment into the base wake. This action is observed to limit flow entrainment towards the ground leading to a higher wake and a characteristic ‘waist’. Enhanced mixing is also demonstrated. Overall, results suggest the suitability of lobed mixers as an effective means for drag reduction of boat-tailed ground vehicles. | en_US |
dc.description.sponsorship | EPSRC; Brunel University | en_US |
dc.language.iso | en | en_US |
dc.publisher | Isfahan University of Technology | en_US |
dc.subject | Drag reduction | en_US |
dc.subject | Lobed mixers | en_US |
dc.subject | Boat-tailed vehicles | en_US |
dc.title | Application of Lobed Mixers to Reduce Drag of Boat-tailed Ground Vehicles | en_US |
dc.type | Article | en_US |
dc.relation.isPartOf | Journal of Applied Fluid Mechanics | - |
pubs.publication-status | Accepted | - |
Appears in Collections: | Dept of Mechanical and Aerospace Engineering Research Papers |
Files in This Item:
File | Description | Size | Format | |
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FullText.pdf | 2.63 MB | Adobe PDF | View/Open |
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