Results 31 to 40 of about 116,681 (302)

Lift-enhancing tabs on multielement airfoils [PDF]

Journal of Aircraft, 1995
The use of flat-plate tabs (similar to Gurney flaps) to enhance the lift of multielement airfoils is extended here by placing them on the pressure side and near the trailing edge of the main element rather than just on the furthest downstream wing element. The tabs studied range in height from 0.125 to 1.25% of the airfoil reference chord. In practice,
James C. Ross, Bruce L. Storms, Paul G. Carrannanto   +2 more
openaire   +1 more source

Object-guided Spatial Attention in Touch: Holding the Same Object with Both Hands Delays Attentional Selection [PDF]

, 2009
Previous research has shown that attention to a specific location on a uniform visual object spreads throughout the entire object. Here we demonstrate that, similar to the visual system, spatial attention in touch can be object guided.
Bettina Forster, Driver J., Helge Gillmeister, Humphreys G. W., Julia Adler, Mangun G. R., Schicke T.   +6 more
core   +1 more source

Wing flexibility enhances load-lifting capacity in bumblebees [PDF]

Proceedings of the Royal Society B: Biological Sciences, 2013
The effect of wing flexibility on aerodynamic force production has emerged as a central question in insect flight research. However, physical and computational models have yielded conflicting results regarding whether wing deformations enhance or diminish flight forces. By experimentally stiffening the wings of live bumblebees, we demonstrate that wing
Andrew M, Mountcastle, Stacey A, Combes
openaire   +2 more sources

Bubbly and Buoyant Particle-Laden Turbulent Flows [PDF]

, 2020
Fluid turbulence is commonly associated with stronger drag, greater heat transfer, and more efficient mixing than in laminar flows. In many natural and industrial settings, turbulent liquid flows contain suspensions of dispersed bubbles and light ...
Lohse, Detlef, Mathai, Varghese, Sun, Chao   +2 more
core   +2 more sources

Numerical Study of the Lift Enhancement Mechanism of Circulation Control in Transonic Flow

Aerospace, 2021
The lift of an aircraft can be effectively enhanced by circulation control (CC) technology at subsonic speeds, but the efficiency at transonic speeds is greatly decreased. The underlying mechanism of this phenomenon is not fully understood. In this study,
Ye Chen, Zhongxi Hou, Xiaolong Deng, Zheng Guo, Shuai Shao, Boting Xu   +5 more
doaj   +1 more source

Design of High-Efficiency Jet Lift Enhancement for Flaps Under Propeller Slipstream Influence

Aerospace
Both propeller slipstream and flap jet flow can significantly increase the aircraft lift coefficient. To establish design principles for efficient lift enhancement via jet flow under the influence of slipstream, wind tunnel experiments are conducted on a
Yan Shao, Wanbo Wang, Jiao Sun, Wenyi Chen, Xinhai Zhao, Jiaxin Pan   +5 more
doaj   +1 more source

Lift Enhancement of Tiltrotor Wing Using a Gurney Flap

International Journal of Aerospace Engineering, 2022
A numerical investigation was undertaken to explore the lift-enhancing characteristics of the Gurney flap on a tiltrotor wing. The heights of Gurney flaps range from 1 to 4% wing chord lengths.
Hao Chen, Bo Chen
doaj   +1 more source

Chemical enhancement of footwear impressions in blood deposited on fabric — evaluating the use of alginate casting materials followed by chemical enhancement [PDF]

, 2010
Most footwear marks made in blood on a surface such as fabric tend to be enhanced in situ rather than physically recovered using a lifting technique prior to enhancement.
Bandey, Helen, Farrugia, Kevin J., Home Office Scientific Development Branch, Fingerprint and Footwear Forensic Group, NicDaeid, N., Savage, Kathleen   +4 more
core   +3 more sources

Unveiling the origin of third harmonic generation in hybrid ITO-plasmonic crystals [PDF]

, 2015
A hybrid plasmonic crystal for reaching a higher nonlinear upconversion rate is proposed and the physical mechanism behind the enhancement is unveiled by demonstrating that the nonlinear signal contains a unique spectral fingerprint regarding its origin.
Aouani, Aouani, Aouani, Aouani, Aouani, Atwater, Bharadwaj, Boyd, Brown, Chen, Curto, Giannini, Hanke, Harutyunyan, Humphrey, Kauranen, Kinkhabwala, Metzger, Navarro-Cía, Neubrech, Novotny, Palik, Pu, Punj, Rahmani, Schuller, Schumacher, Sivis, Vercruysse, Zhang   +29 more
core   +2 more sources

Lift enhancement characteristics of distributed propulsion wing with propulsion-aerodynamic coupling

Kongqi donglixue xuebao
To reconcile the high-lift demands of short takeoff and landing (STOL) with the requirement for efficient cruise in unmanned aerial vehicles (UAVs), this paper presents a novel distributed propulsion wing lift enhancement configuration (DPWLEC) that ...
Jingting YANG, Kelei WANG, Zhou ZHOU, Jia ZENG   +3 more
doaj   +1 more source