Results 71 to 80 of about 92,283 (210)

Scaling trends of bird's alular feathers in connection to leading-edge vortex flow over hand-wing. [PDF]

Sci Rep, 2020
Linehan T, Mohseni K.
europepmc   +1 more source

Low-speed aerodynamic characteristics of a highly swept, untwisted uncambered arrow wing [PDF]

An investigation was conducted in the Langley 4- by 7-Meter Tunnel to provide a detailed study of wing pressure distributions and forces and moments acting on a highly swept arrow-wing model at low Mach numbers (0.25).
Coe, P. L., Jr., Gentry, G. L., Jr., Kjelgaard, S. O.   +2 more
core   +1 more source

Flow Characteristics and Loss Mechanism of Tip Leakage Flow in Mining Contra-Rotating Axial Flow Fan

Applied Sciences
Tip leakage flow interacts with the mainstream, impacting the energy transmission process within the impeller of the fan and causing a significant flow loss.
Yongping Chen, Ronghua Liu, Wenqing Peng, Shiqiang Chen   +3 more
doaj   +1 more source

An experimental investigation of the parallel blade-vortex interaction [PDF]

A scheme for investigating the parallel blade vortex interaction (BVI) has been designed and tested. The scheme involves setting a vortex generator upstream of a nonlifting rotor so that the vortex interacts with the blade at the forward azimuth.
Caradonna, F. X., Laub, G. H., Tung, C.
core   +1 more source

Cavitation vortex evolution and alleviation in Francis turbines during load reduction: Numerical insights for grid stability-oriented blade optimization

Energy Conversion and Management: X
In the context of flexible grid regulation, Francis turbines often operate under off-design conditions with frequent load transitions, during which cavitation vortices pose serious stability challenges. This study investigates the evolution of cavitating
Zhaoning Wang, Pengcheng Guo, Longgang Sun, Qian Zhang, Guodong Liu, Yanyan Li   +5 more
doaj   +1 more source

Load distribution on a closed-coupled wing canard at transonic speeds [PDF]

A wind tunnel test where load distributions were obtained at transonic speeds on both the canard and wing surfaces of a closely coupled wing canard configuration is reported.
Gloss, B. B., Washburn, K. E.
core   +1 more source

Influence of Gurney Flap and Leading-Edge/Trailing-Edge Flaps on the Stall Characteristics and Aeroacoustic Performance of Airfoils

Fluids
In aerospace, flow control techniques have improved the separation flow characteristics around airfoils by various means. In this paper, the delayed detached eddy simulation (DDES) technique is used to simulate the detailed flow field around the NACA0021
Zelin Liu, Kaidi Li, Xiaojing Sun
doaj   +1 more source

Numerical simulation of flow characteristics behind the aerodynamic performances on an airfoil with leading edge protuberances

Engineering Applications of Computational Fluid Mechanics, 2017
This article presents a numerical investigation of the effects of leading-edge protuberances on airfoil stall and post-stall performance. An improved delayed detached eddy simulation (IDDES) method was adopted.
Ming Zhao, Mingming Zhang, Jianzhong Xu
doaj   +1 more source

Leading-edge pressure measurements of airfoil vortex interaction [PDF]

Experimental pressure-differential measurements made at 10% chord of an airfoil-vortex interaction are presented. A line vortex was oscillated over an airfoil perpendicular to the span and parallel to the chord.
Walsh, R. G., Jr.
core   +1 more source

Comparison of vortex lattice predicted forces with wind tunnel experiments for the F-4E(CCV) airplane with a closely coupled canard [PDF]

The F-4E (CCV) wind tunnel model with closely coupled canard control surfaces was analyzed by means of a version of a vortex lattice program that included the effects of nonlinear leading edge or side edge vortex lift on as many as four individual ...
Gross, L. W.
core   +1 more source