Results 71 to 80 of about 127,528 (211)

Aeroelastic Analysis of a Tailless Flying Wing with a Rotating Wingtip

Aerospace
This paper presents a preliminary investigation into the aeroelastic behavior of a tailless flying wing equipped with a rotating wingtip. Based on the configuration of Innovative Control Effectors (ICE) aircraft, an aeroelastic model of the tailless ...
Weiji Wang, Xinyu Ai, Xin Hu, Chongxu Han, Xiaole Xu, Zhihai Liang, Wei Qian   +6 more
doaj   +1 more source

An experimental and analytical investigation of proprotor whirl flutter [PDF]

The results of an experimental parametric investigation of whirl flutter are presented for a model consisting of a windmilling propeller-rotor, or proprotor, having blades with offset flapping hinges mounted on a rigid pylon with flexibility in pitch and
Kohn, J. S., Kvaternik, R. G.
core   +1 more source

Three-Dimensional Flutter Numerical Simulation of Wings in Heavy Gas and Transonic Flutter Similarity Law Correction Method

Aerospace
Wind tunnel testing is a crucial method for studying aircraft flutter. Using heavy gas as the wind tunnel medium can mitigate the escalating issue of test models being overweight as advanced aircraft develop.
Zhe Hu, Bo Lu, Yongping Liu, Li Yu, Xiping Kou, Jun Zha   +5 more
doaj   +1 more source

A preliminary study of the effects of vortex diffusers (winglets) on wing flutter [PDF]

Some experimental flutter results are presented for a simple, flat-plate wing model and for the same wing model equipped with two different upper surface vortex diffusers over the Mach number range from about 0.70 to 0.95.
Doggett, R. V., Jr., Farmer, M. G.
core   +1 more source

Prediction of flutter onset by an LSTM neural network from measured time-variable responses of a randomly-tested airfoil using Lyapunov exponents for flutter classification

Applied and Computational Mechanics
Flutter, a self-excited oscillation due to energy transfer from the flow to the structure, can cause catastrophic failures in many aerospace structures if uncontrolled.
Pešek L., Schumann W.
doaj   +1 more source

Experimental and analytical transonic flutter characteristics of a geared-elevator configuration [PDF]

The flutter model represented the aft fuselage and empennage of a proposed supersonic transport airplane and had an all movable horizontal tail with a geared elevator. It was tested mounted from a sting in the transonic dynamics tunnel. Symmetric flutter
Doggett, R. V., Jr., Gregory, R. A., Ruhlin, C. L.   +2 more
core   +1 more source

Numerical and experimental study on flutter characteristics of a wing with drag rudder

Kongqi donglixue xuebao
The drag rudder serves as an unconventional control surface specifically designed for flying wing aircraft. Positioned near the wingtips, the drag rudder splits to generate drag force and yawing moments, which exhibits significant nonlinear ...
Yongchang LI, Yizhe HAN, Yuting DAI, Yuting DAI, Yuting DAI, Chao YANG, Chao YANG   +6 more
doaj   +1 more source

Comparison of analytical and wind-tunnel results for flutter and gust response of a transport wing with active controls [PDF]

Two flutter suppression control laws wre designed and tested on a low speed aeroelastic model of a DC-10 derivative wing. Both control laws demontrated increases in flutter speed in excess of 25 percent above the passive wing flutter speed.
Abel, I., Newsom, J. R., Perry, B., III
core   +1 more source

Experimental parametric studies of transonic T-tail flutter [PDF]

Wind-tunnel tests of the T-tail of a wide-body jet airplane were made at Mach numbers up to 1.02. The model consisted of a 1/13-size scaled version of the T-tail, fuselage, and inboard wing of the airplane.
Ruhlin, C. L., Sandford, M. C.
core   +1 more source

Flutterings [PDF]

Medical Humanities, 2017
openaire   +3 more sources