ISSN:
1662-0356
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Allgemeine Naturwissenschaft
,
Technik allgemein
Notizen:
Myliobatidae is a family of large pelagic rays including cownose, eagle and manta rays.They are extremely efficient swimmers, can cruise at high speeds and can perform turn-on-a-dimemaneuvering, making these fishes excellent inspiration for an autonomous underwater vehicle.Myliobatoids have been studied extensively from a biological perspective; however the fluidmechanisms that produce thrust for their large-amplitude oscillatory-style pectoral fin flapping areunknown. An experimental robotic flapping wing has been developed that closely matches thecamber and planform shapes of myliobatoids. The wing can produce significant spanwisecurvature, phase delays down the span, and oscillating frequencies of up to 1 Hz, capturing thedominant kinematic modes of flapping for myliobatoids. This paper uses dye flow visualization toqualitatively characterize the fluid mechanisms at work during steady-state oscillation. It is shownthat oscillatory swimming uses fundamentally different fluid mechanisms than undulatoryswimming by the generation of leading-edge vortices. Lessons are distilled from studying the fluiddynamics of myliobatoids that can be applied to the design of biomimetic underwater vehicles usingmorphing wing technology
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.58.25.pdf
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