Results 91 to 100 of about 9,736 (218)

Modeling of Broadband Liners Applied to the Advanced Noise Control Fan [PDF]

The broadband component of fan noise has grown in relevance with an increase in bypass ratio and incorporation of advanced fan designs. Therefore, while the attenuation of fan tones remains a major factor in engine nacelle acoustic liner design, the ...
Jones, Michael G., Nark, Douglas M., Sutliff, Daniel L.   +2 more
core   +1 more source

On the Dynamics of Flexible Wings for Designing a Flapping-Wing UAV

Drones
The increasing number of applications involving the use of UAVs has motivated the research for design considerations that increase the safety, endurance, range, and payload capability of these vehicles.
Renan Cavenaghi Silva, Douglas D. Bueno
doaj   +1 more source

Research on dynamic characteristics of large deformation shearer cable based on absolute node coordinate formulation method. [PDF]

PLoS One, 2023
Zhao L, Zhang H, Gao F, Han L, Ge M.
europepmc   +1 more source

Improved Broadband Liner Optimization Applied to the Advanced Noise Control Fan [PDF]

The broadband component of fan noise has grown in relevance with the utilization of increased bypass ratio and advanced fan designs. Thus, while the attenuation of fan tones remains paramount, the ability to simultaneously reduce broadband fan noise ...
Ayle, Earl, Ichihashi, Fumitaka, Jones, Michael G., Nark, Douglas M., Sutliff, Daniel L.   +4 more
core   +1 more source

Dynamic modeling and simulation of rigid-flexible coupling cable system by absolute nodal coordinate formulation. [PDF]

Sci Rep, 2022
Wang X, Zhao J, Wang H, Song H, Luo Z, Han Q.   +5 more
europepmc   +1 more source

Suspension mechanism and method [PDF]

The invention is a suspension mechanism and method for suspending a flexible test structure T(sub s) subjected to large horizontal translational and vibratory motions.
Cooley, Victor M., Woodard, Stanley E.
core   +1 more source

Critical Flow Velocity Analysis of Multi-Span Viscoelastic Micro-Bending Irrigation Pipelines

Agriculture
Irrigation pipelines are critical agricultural hydraulic facilities that often develop minor bending defects due to ground settlement or improper installation.
Sihao Wu, Bo Fan, Jianhua Cao, Suwei Xiao, Yuhe Cao   +4 more
doaj   +1 more source

Active Control of Low-Speed Fan Tonal Noise Using Actuators Mounted in Stator Vanes: Part III Results [PDF]

A test program to demonstrate simplification of Active Noise Control (ANC) systems relative to standard techniques was performed on the NASA Glenn Active Noise Control Fan from May through September 2001.
Remington, Paul J., Sutliff, Daniel L., Walker, Bruce E.   +2 more
core   +1 more source

Linear Parameter-Varying Control of a Ducted Fan Engine [PDF]

, 1995
Parameter-dependent control techniques are applied to a vectored thrust, ducted fan engine. The synthesis technique is based on the solution of Linear Matrix Inequalities and produces a controller which achieves specified performance against the worst ...
Bendotti, Pascale, Bodenheimer, Bobby, Kantner, Michael   +2 more
core   +1 more source

Novel Engineering and Fabrication Techniques Tested in Low-Noise- Research Fan Blades [PDF]

A major source of fan noise in commercial turbofan engines is the interaction of the wake from the fan blades with the stationary vanes (stators) directly behind them.
Cunningham, Cameron C.
core   +1 more source