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Molecular spectrosc...
Molecular spectroscopy : modern research. Vol. 2 / edited by K. Narahari Rao.
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Rao, K. Narahari (contributor)
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Rao, K. Narahari (editor)
- ISBN 0125806426
- New York : Acadademic Press, 1976
- English xiv, 279 s.
Abstract
Subject headings
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- Micro aerial vehicles (MAVs) are distinguished by their small size, low aspect ratio, and low velocity. As a result, MAVs fly at low Reynolds number flow regimes with significant drag characteristics and strong tip vortices. This investigation is focused on the aerodynamic characteristics of a recently developed MAV at the University of Colorado. The Colorado MAV has a flexible membrane wing with an aspect ratio of 1.2 and a chord of 0.27 m. Numerical simulations of the flow around the Colorado fixed wing MAV are presented using a steady state parallel compressible Navier-Stokes solver. The computational grid has 510,000 nodes and about 3 million tetrahedral elements. The maximum calculated lift coefficient is approximately 1.2. The airplane stall angle is at 30°. The high stall angle is attributed to the enhanced lift from a low pressure region above the wing caused by strong tip vortices. Minimum drag coefficient was calculated to be 0.06 at 2° angle of attack. A laminar separation bubble is formed on the upper surface of the wing at moderate angle of attack. The drag increases rapidly as the angle of attack increases. A maximum aerodynamic efficiency of L/D = 4 is observed when flying at 10 m/s.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Rymd- och flygteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Aerospace Engineering (hsv//eng)
Keyword
- Aerodynamic characteristics
- Aerodynamic efficiency
- Compressible Navier-Stokes
- Laminar separation bubble
- Low Reynolds number flow
- Micro aerial vehicle
- Tetrahedral elements
- University of Colorado
- Angle of attack
- Aspect ratio
- Computer simulation
- Drag
- Fixed wings
- Flow control
- Laminar flow
- Micro air vehicle (MAV)
- Numerical models
- Reynolds number
- Wind tunnels
- Lift
Publication and Content Type
- ref (subject category)
- kon (subject category)
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