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A note on wind-tunn...
A note on wind-tunnel turbulence measurements with DPIV
- Article/chapterEnglish2009
Publisher, publication year, extent ...
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2008-10-26
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Springer Science and Business Media LLC,2009
Numbers
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LIBRIS-ID:oai:lup.lub.lu.se:947d71bd-db92-4f62-8949-c78ded387c43
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https://lup.lub.lu.se/record/1311512URI
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https://doi.org/10.1007/s00348-008-0578-1DOI
Supplementary language notes
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Language:English
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Summary in:English
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Classification
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Subject category:art swepub-publicationtype
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Subject category:ref swepub-contenttype
Notes
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At moderate Reynolds numbers (10(4) a parts per thousand currency sign Re a parts per thousand currency sign 10(5)), the performance of lifting surfaces is strongly affected by the potential for laminar boundary layer separation and subsequent reattachment and the use of high-quality, low-turbulence wind tunnels is essential in characterising flight at comparatively small scales (where the wing chord may be from 1 to 5 cm in length) and low speeds (on the order of 10 m/s). Measurement of the existing turbulence levels in such facilities is hard and has not been achieved using DPIV methods due to the relatively small bandwidth of measurable velocities. A series of experiments is reported here where DPIV sampling parameters are driven beyond their normal range in an attempt to measure turbulence levels in a low turbulence wind tunnel. The results show that DPIV can measure the background turbulence, and therefore its instantaneous structure. The measurements also reveal certain challenges in investigating the aerodynamic performance of small-scale flying devices.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
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Hedenström, AndersLund University,Lunds universitet,Evolutionär ekologi,Biologiska institutionen,Naturvetenskapliga fakulteten,Evolutionary ecology,Department of Biology,Faculty of Science(Swepub:lu)ekol-ahe
(author)
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Johansson, ChristofferLund University,Lunds universitet,Evolutionär ekologi,Biologiska institutionen,Naturvetenskapliga fakulteten,Evolutionary ecology,Department of Biology,Faculty of Science(Swepub:lu)teor-cjo
(author)
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Evolutionär ekologiBiologiska institutionen
(creator_code:org_t)
Related titles
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In:Experiments in Fluids: Springer Science and Business Media LLC46:3, s. 527-5371432-11140723-4864
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