Results 51 to 60 of about 2,053,013 (165)

Northern fur seal whisker bioaccumulation and partitioning of polybrominated diphenyl ethers and organochlorines

open access: yesEmerging Contaminants
The eastern Pacific stock of northern fur seals (Callorhinus ursinus) on the Pribilof Islands, Alaska represents over 50 % of the global breeding population, but it has experienced population declines of unknown cause(s) since 1980.
Courtney M. White   +2 more
doaj   +1 more source

Aircraft Wings and Morphing–Evolution of the Concepts

open access: yesEncyclopedia
This encyclopedia entry provides an updated appreciation of the evolution of morphing aircraft wings, organized as follows: first, lift concepts are briefly examined; second, patents related to lift enhancement are discussed, showcasing existing ...
Sérgio M. O. Tavares   +2 more
doaj   +1 more source

Numerical Investigation on Flow Separation Control of Low Reynolds Number Sinusoidal Aerofoils [PDF]

open access: yes, 2016
The paper presents a computational analysis of the characteristics of a NACA 634- 021 aerofoil incorporated with sinusoidal leading-edge protuberances at Re = 14,000. The protuberances are characterized by an amplitude and wavelength of 12% and 50% of
Cai C.   +4 more
core   +1 more source

Finite element modeling of wing bird strike [PDF]

open access: yesFME Transactions, 2015
Bird strike events are a potential dangerous problem faced by flight safety nowadays. These events are usually simulated through numerical approaches due mainly to the technical difficulties and high costs associated with experimental tests.
Ugrčić Marinko   +4 more
doaj  

A Note on the Calculation of Supercavitating Hydrfoils with Rounded Noses [PDF]

open access: yes, 1973
Practical supercavitating hydrfoils have rounded leading edges for mechanical strength. The prediction of pressures near the leading edge of such hydrofoils by linearized free streamline theory fails because singularities are usually required there by ...
Acosta, A. J., Furuya, O.
core  

Rotational accelerations stabilize leading edge vortices on revolving fly wings [PDF]

open access: yes, 2009
The aerodynamic performance of hovering insects is largely explained by the presence of a stably attached leading edge vortex (LEV) on top of their wings. Although LEVs have been visualized on real, physically modeled, and simulated insects, the physical
Dickinson, Michael H., Lentink, David
core   +2 more sources

Leading-Edge Noise Mitigation on a Rod–Airfoil Configuration Using Regular and Irregular Leading-Edge Serrations

open access: yesApplied Sciences
Rod–airfoil configurations are commonly used to study turbulence–structure interaction noise, which is a major contributor to aerodynamic noise in various engineering applications.
Mehmet Numan Kaya   +3 more
doaj   +1 more source

Metabolic Compartmentalization at the Leading Edge of Metastatic Cancer Cells

open access: yesFrontiers in Oncology, 2020
Despite advances in targeted therapeutics and understanding in molecular mechanisms, metastasis remains a substantial obstacle for cancer treatment. Acquired genetic mutations and transcriptional changes can promote the spread of primary tumor cells to ...
Kara Wolfe   +9 more
doaj   +1 more source

Computation of leading-edge vortex flows [PDF]

open access: yes
The simulation of the leading edge vortex flow about a series of conical delta wings through solution of the Navier-Stokes and Euler equations is studied. The occurrence, the validity, and the usefulness of separated flow solutions to the Euler equations
Newsome, R. W., Thomas, J. L.
core   +1 more source

Towards a novel design method for impact on leading edges [PDF]

open access: yes, 2006
Results of a parametric study concerning low velocity impact on leading edge profiles is presented. This work is the first part of a larger program on the development of an engineering design method for impact on Glare.
Houten, M.H. van, Kaplan, H.
core   +1 more source

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