Results 71 to 80 of about 286,563 (197)
Flapping states of an el astically anchored wing in a uniform flow
, 2012 Linear stability analysis of an elastically anchored wing in a uniform flow is investigated both analytically and numerically. The analytical formulation explicitly takes into account the effect of the wake on the wing by means of Theodorsen's theory ...
Boragno, C. +4 more
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Novel Schemes of No-Slip Boundary Conditions for the Discrete Unified Gas Kinetic Scheme Based on the Moment Constraints. [PDF]
Entropy (Basel), 2023 Guo W, Hou G.
europepmc +1 more source
Energy efficient aircraft engines [PDF]
The three engine programs that constitute the propulsion portion of NASA's Aircraft Energy Efficiency Program are described, their status indicated, and anticipated improvements in SFC discussed.
Chamberlin, R., Miller, B.
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Advanced turboprop technology development [PDF]
The efficiency of high-speed turboprop propulsion systems is considered with emphasis on fuel savings. Specific topics discussed include: (1) high efficiency and low noise of propeller design; (2) fuselage noise attenuation; (3) propeller and gear box ...
Bencze, D. P. +2 more
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Low density gas dynamic wall boundary conditions [PDF]
Low density nozzles or large expansion ratio nozzles used in space experience rarefaction effects near their exit in the form of velocity slip and temperature jump at the walls.
Collins, F. G.
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Penn State axial flow turbine facility: Performance and nozzle flow field [PDF]
The objective is to gain a thorough understanding of the flow field in a turbine stage including three-dimensional inviscid and viscid effects, unsteady flow field, rotor-stator interaction effects, unsteady blade pressures, shear stress, and velocity ...
Itoh, S. +2 more
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The NASA high-speed turboprop program [PDF]
Technology readiness for Mach 0.7 to 0.8 turboprop powered aircraft with the potential for fuel savings and DOC reductions of up to 30 and 15 percent respectively relative to current in-service aircraft is addressed. The areas of propeller aeroacoustics,
Dugan, J. F. +3 more
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A mathematical model of an active control landing gear for load control during impact and roll-out [PDF]
A mathematical model of an active control landing gear (ACOLAG) was developed and programmed for operation on a digital computer. The mathematical model includes theoretical subsonic aerodynamics; first-mode wing bending and torsional characteristics ...
Carden, H. D., Mcgehee, J. R.
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Hydrogen-Induced Ductility Loss of GH625 Superalloy Under Thermal Hydrogen Charging. [PDF]
Materials (Basel)Zhang J +6 more
europepmc +1 more source
Learning aerodynamics for the control of flying humanoid robots. [PDF]
Commun EngPaolino A +10 more
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