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Multiple leading edge vortices of unexpected strength in freely flying hawkmoth.

Författare

Summary, in English

The Leading Edge Vortex (LEV) is a universal mechanism enhancing lift in flying organisms. LEVs, generally illustrated as a single vortex attached to the wing throughout the downstroke, have not been studied quantitatively in freely flying insects. Previous findings are either qualitative or from flappers and tethered insects. We measure the flow above the wing of freely flying hawkmoths and find multiple simultaneous LEVs of varying strength and structure along the wingspan. At the inner wing there is a single, attached LEV, while at mid wing there are multiple LEVs, and towards the wingtip flow separates. At mid wing the LEV circulation is ~40% higher than in the wake, implying that the circulation unrelated to the LEV may reduce lift. The strong and complex LEV suggests relatively high flight power in hawmoths. The variable LEV structure may result in variable force production, influencing flight control in the animals.

Publiceringsår

2013

Språk

Engelska

Publikation/Tidskrift/Serie

Scientific Reports

Volym

3

Dokumenttyp

Artikel i tidskrift

Förlag

Nature Publishing Group

Ämne

  • Biological Sciences
  • Zoology

Status

Published

Forskningsgrupp

  • Animal Flight Lab

ISBN/ISSN/Övrigt

  • ISSN: 2045-2322