A novel MAV with treadmill motion of wing

Abstract

The Magnus effect is well known phenomena for producing high lift values from spinning symmetrical geometries such as cylinders, spheres, or disks. But, the Magnus force may also be produced by treadmill motion of aerodynamic bodies. To accomplish this, the skin of aerodynamic bodies may circulate with a constant circumferential speed. Here, a novel wing with treadmill motion of skin is introduced which may generate lift at zero air speeds. The new wing may lead to micro aerial vehicle configurations for vertical take-off or landing. To prove the concept, the NACA0015 aerofoil section with circulating skin is computationally investigated. Two cases of stationary air and moving air are studied. It is observed that lift can be generated in stationary air although drag force is also high. For moving air, the lift and drag forces may be adopted between the incidence angles 20 • to 25 • where lift can posses high values and drag can remain moderate. c ⃝

An Innovative Treadmill-Magnus Wind Propulsion System for Naval Ships

“…5); but, no computational or experimental studies was found in literature to address this. Samani and Sedaghat [8] have examined the application of such an aerofoil in a novel vertical take-off Micro Air Vehicle (MAV). To our knowledge, some computational or experimental efforts were made towards analysis and simulation of spinning cylinders in the leading or trailing edges of aerofoil such as shown in (Fig.…”

The effects of rectangular riblets on rectangular micro air vehicles for drag reduction

“…In cases where fluid velocity on the surface varies during time intervals, it is not recommended to use these covers. 7–9 Because of the positive pressure gradient created on the surface, the vortex is aroused in the back surface as flow passing over the surface. But, as shown in Figure 1, riblets steer the flow and delay the separation, which causes reduction in the total drag.…”