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Control Of A Swept Wing Tailless Aircraft Through Wing Morphing, Richard W. Guiler
Control Of A Swept Wing Tailless Aircraft Through Wing Morphing, Richard W. Guiler
Graduate Theses, Dissertations, and Problem Reports
Inspired by flight in nature, work done by Lippisch, the Hortens, and Northrop offered insight to achieving the efficiency of bird flight with swept-wing tailless aircraft. Tailless designs must incorporate aerodynamic compromises for control, which have inhibited potential advantages. A morphing mechanism, capable of changing the twist of wing and that can also provide pitch, roll and yaw control for a tailless swept wing aircraft is the first step to a series of morphing techniques, which will lead to more fluid, bird-like flight. This research focuses on investigating the design of a morphing wing to improve the flight characteristics of …
Pressure Deflection Behavior Of Candidate Materials For A Morphing Wing, Christopher Griffin
Pressure Deflection Behavior Of Candidate Materials For A Morphing Wing, Christopher Griffin
Graduate Theses, Dissertations, and Problem Reports
The research presented in this thesis evaluates different materials that are candidates to be used as a flexible skin on a morphing wing. A morphing wing has come to be known as any wing that changes shape. Although there has been a great amount of research involved in designing morphing mechanisms, the information for applicable wing skin material has been limited. A morphing wing skin needs to be flexible enough to deflect and morph to a new shape given a suitable amount of force, yet strong enough to resist the aerodynamic forces encountered during flight. It also must remain elastic …
Numerical Investigation Of Wing Morphing Capabilities Applied To A Horten Type Swept Wing Geometry, Ashwin Vishwanathan
Numerical Investigation Of Wing Morphing Capabilities Applied To A Horten Type Swept Wing Geometry, Ashwin Vishwanathan
Graduate Theses, Dissertations, and Problem Reports
The inspiration for this work has been derived from the work done by Lippisch, the Hortens, Northrop and largely by the flight of birds in nature. Swept-wing tailless aircraft have been in vogue since World War-II and have now taken on a new role in stealth warfare primarily due to their low radar signatures. They also exhibit a highly efficient aerodynamic configuration with low parasitic drag. However, conventional tailless aircraft suffer from a lack of proper control mechanisms and have thus been forced to compromise their efficiency for better control. This work done at WVU aims to introduce a morphing …
Numerical Study Of Wingtip Shed Vorticity Reduction By Wing Boundary Layer Control, Jose Alejandro Posada
Numerical Study Of Wingtip Shed Vorticity Reduction By Wing Boundary Layer Control, Jose Alejandro Posada
Graduate Theses, Dissertations, and Problem Reports
Wingtip vortex reductions have been obtained by Boundary Layer Control application to an AR=1.5 rectangular wing using a NACA 0012 airfoil. If wingtip shed vorticity could be reduced significantly, then so would induced drag resulting in improved cruise fuel economy. Power savings would be even more impressive at low flight speed or in climb.;A two dimensional wing produces lift without wingtip vorticity. Its bound vorticity, Gamma, equals the contour integral of the boundary layer vorticity gamma or Gamma = ∮gamma · dl. Where the upper and lower boundary layers meet at the cusped TE, their local static pressure pu=pl then …
Computational Analysis Of Airfoils In Ground Effect For Use As A Design Tool, Justin L. Smith
Computational Analysis Of Airfoils In Ground Effect For Use As A Design Tool, Justin L. Smith
Graduate Theses, Dissertations, and Problem Reports
There has been interest shown in a recreational glider which operates primarily in the flight regime known as ground effect. Ground effect traditionally occurs when the airfoil is within a chords length of the ground. It is well known in the art that when the airfoil is present in ground effect the lift force is increased and the drag force is reduced on the lifting surfaces, in turn increasing the L/D ratio.;This recreational glider would have no internal power supply and only rely on the outside acting force. The considered force that would be used to propel this recreational glider …