Results 91 to 100 of about 3,774 (202)

Reynolds Number Effect on Turbulent Drag Reduction [PDF]

, 2015
open3siGatti, D.; Quadrio, M.; Frohnapfel, B.Gatti, D.; Quadrio, Maurizio; Frohnapfel ...

core  

Aerothermal Investigation of the Effect of Endwall Structures on Radial Turbine Heat Losses

Energies
This paper presents a detailed numerical investigation of the effect of hub-mounted riblets on the thermal and aerodynamic performance of a radial turbine rotor. While prior studies have shown that riblets reduce wall shear stress and improve aerodynamic
M. A. Khader, A. I. Sayma, Jafar Al-Zaili, Mohsen Ghavami, Hongwei Wu   +4 more
doaj   +1 more source

Calibration of averaging total pressure flight wake rake and natural-laminar-flow airfoil drag certification [PDF]

An averaging total pressure wake rake used by the Cessna Aircraft Company in flight tests of a modified 210 airplane with a laminar flow wing was calibrated in wind tunnel tests against a five-tube pressure probe. The model generating the wake was a full-
Irani, E., Snyder, M. H.
core   +1 more source

Polymer/riblet combination for hydrodynamic skin friction reduction [PDF]

A process is disclosed for reducing skin friction and inhibiting the effects of liquid turbulence in a system involving the flow of a liquid along the surface of a body, e.g., a marine vehicle. This process includes injecting a drag reducing polymer into
Bushnell, Dennis M., Reed, Jason C.
core   +1 more source

Interpolation of Turbulent Boundary Layer Profiles Measured in Flight Using Response Surface Methodology

Applied Sciences, 2018
Turbulent boundary layer profiles on the aircraft surface were characterized by pitot-rake measurements conducted in flight experiments at high subsonic Mach number ranges.
Hidemi Takahashi, Mitsuru Kurita, Hidetoshi Iijima, Monami Sasamori   +3 more
doaj   +1 more source

Fine details in solar flare ribbons

Astronomy & Astrophysics
Context. Flare ribbons serve as chromospheric footprints of energy deposition resulting from particle acceleration during magnetic reconnection. Their fine-scale structure provides a valuable tool for probing the dynamics of the flare reconnection ...
Thoen Faber Jonas, Joshi Reetika, Rouppe van der Voort Luc, Wedemeyer Sven, Øyre Eilif Sommer, Soler Poquet Ignasi J., Brunvoll Aline Rangøy   +6 more
doaj   +1 more source

Drag Reduction by Fish-Scale Inspired Transverse Asymmetric Triangular Riblets: Modelling, Preliminary Experimental Analysis and Potential for Fouling Control. [PDF]

Biomimetics (Basel), 2023
Hamilton BW, Tutunea-Fatan OR, Bordatchev EV.   +2 more
europepmc   +1 more source

Late Cretaceous Limea (Pseudolimea) species of Europe [PDF]

, 1989
Four Limea (Pseudolimea) species [L. (Ps.) composita. L. (Ps.) granulata, L. (Ps.) denticulata, L. (Ps.) geinitzi] which occur frequently in Late Cretaceous strata of Europe, are redescribed.
Dhondt, A.V.
core  

Low-dimensional dynamics embedded in a plane Poiseuille flow turbulence : Traveling-wave solution is a saddle point ?

, 1999
The instability of a streak and its nonlinear evolution are investigated by direct numerical simulation (DNS) for plane Poiseuille flow at Re=3000. It is suggested that there exists a traveling-wave solution (TWS).
Hamilton J. M., Holmes P., Jeong J., Jiménez J., Jiménez J., Kim J., Kim J., Kline S. J., Robinson S. K., Runstadler P. G., Schoppa W., Swearingen J. D., Waleffe F., Waleffe F., Waleffe F.   +14 more
core   +1 more source

Effects of Materials and Riblets on Erosion Mitigation Induced by Multiple Collapses of Cavitation Bubbles

Applied Sciences
The current research investigates the effects of materials and riblets on cavitation-induced erosion morphology, depth, and cross-sectional area through experimental approaches. To achieve these aims, the erosion of pure aluminum (1xxxAl or Al) and alpha
Ebrahim Kadivar, Sasan Rezaee, Udo Löschner, Ould el Moctar   +3 more
doaj   +1 more source