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On-chip particle levitation and micromanipulation using bulk acoustic waves.
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Thermodynamical parasitic forces in high precision accelerometers on board of a drag-free satellite
Sensors and Actuators A: Physical, 2004Abstract High-resolution accelerometers and gradiometers on board of drag-free satellites are employed in different scientific space missions. The applications range from experiences in fundamental physics to the earth’s observations associated with the precise orbit determination of low earth’s orbiter (LEO) particularly in context with the ...
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Fur increases the parasite drag for flying bats
Canadian Journal of Zoology, 1995We measured the drag (in grams) generated by air flowing at 5.02 m/s over blank plates and test plates to which bat skin and fur was glued, comparing drag values when air flowed with and against the "set" of the fur. Our samples included 37 specimens representing 27 species.
Z. Hassanloo +3 more
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Some Aspects of Parasitic Drag In Dry Friction Clutches
SAE Technical Paper Series, 2001<div class="htmlview paragraph"><i>Clutch drag is caused by friction between clutch parts and adjacent components having different rotational speeds when the clutch is released. The root cause of drag is the presence of normal reactions between friction surfaces when the clutch is disengaged.
Andrzej Szadkowski, Ronald B. Morford
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Parasitic Drag and Requirements for Aircraft External Surface Finish
Journal of Aerospace Sciences and Technologies, 2023Statistical data are presented on the number and frontal areas for principal types of manufacturing and constructive imperfections characterizing the condition of aircraft external surface and the level of parasitic drag. Basic laws of varying drag coefficients for various types of surface excrescences as functions of Mach and Reynolds numbers are ...
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An Aerodynamics Course Project to Illustrate Parasite Drag Coefficient Prediction
48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, 2010This paper describes a novel project that is being used to educate aerospace engineering students in the technique of parasite drag coefficient estimation. The project is conducted on a wing-body-tail configuration using the method of wetted areas. The wing-body-tail is actually a miniature two-man submarine, but the techniques used are identical to an
Eugene Niemi, Raghu Gowda
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Assessment of Methods for the Prediction of Parasitic Drag Due to Wing Repairs
30th AIAA Applied Aerodynamics Conference, 2012analytical and numerical methods to the prediction of parasitic drag due to excrescences introduced by wing repairs. Various approaches for calculating drag coecient increments and associated drag magnification factors for wing repair plates are presented.
Marco Hahn +4 more
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Contrasting the Parasitic Torque on a Drag-Driven VAWT through a Variable-Blade Rotor Architecture
Applied Mechanics and Materials, 2013The present work exhibits a further development of a mean for furthering conventional drag-driven VAWT technology by contrasting the counter-rotating (parasitic) torque generated from drag-driven vertical-axis wind turbine (VAWT) blades travelling into the wind through the use of a variable rotor blade geometry.
Raciti Castelli Marco, BENINI, ERNESTO
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Flight Determination of Partial-Span-Flap Parasite Drag With Flap Deflection
Journal of Aircraft, 2010Level-flightperformancetestswereconductedonatypicallightgeneralaviationsingle-engineretractableaircraft with partially and fully extended partial-span single-slotted flaps in both gear-up and gear-extended configurations. A parabolic variation in the aircraft equivalent parasite drag area with flap deflection was observed for both configurations ...
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