Results 21 to 30 of about 114,704 (299)

Parameter retrieval of aircraft wake vortex based on its max–min distribution of Doppler velocities measured by a Lidar

open access: yesThe Journal of Engineering, 2019
Aircraft wake vortex is a sort of turbulence generated by a flying aircraft. It has attracted much attention in aviation safety area because it may cause a following aircraft to roll out of control.
Hang Gao   +3 more
doaj   +1 more source

An infrared proper motion study of the Orion bullets [PDF]

open access: yes, 1999
We report the first IR proper motion measurements of the Herbig-Haro objects in the Orion Molecular Cloud--One using a four-year time baseline. The [Fe II] emitting bullets are moving of order 0.08 arcsec per year, or at about 170 \kms.
Burton, M. G., Lee, J. -K.
core   +3 more sources

Temporal Up-Sampling of Planar Long-Range Doppler LiDAR Wind Speed Measurements Using Space-Time Conversion

open access: yesRemote Sensing, 2019
Measurement campaigns in wind energy research are becoming increasingly complex, which has exacerbated the difficulty of taking optimal measurements using light detection and ranging (LiDAR) systems.
Hauke Beck, Martin Kühn
doaj   +1 more source

Response of Viscoelastic Turbulent Pipeflow Past Square Bar Roughness: The Effect on Mean Flow

open access: yesComputation, 2021
The influence of viscoelastic polymer additives on response and recovery of turbulent pipeflow over square bar roughness elements was examined using Direct Numerical Simulations at a Reynolds number of 5×103.
Shubham Goswami, Arman Hemmati
doaj   +1 more source

The Effects of Flexible Cylinder Structural Dynamics to the near Wake Turbulence

open access: yesFluids, 2023
The utilization of a rigid and projecting surface, coupled with an agitator and vortex generator, frequently results in the dissipation of more energy than the production of turbulence that meets the required criteria.
Sharul Sham Dol   +3 more
doaj   +1 more source

The Effect of wake Turbulence Intensity on Transition in a Compressor Cascade [PDF]

open access: yes, 2014
Direct numerical simulations of separating flow along a section at midspan of a low-pressure V103 compressor cascade with periodically incoming wakes were performed. By varying the strength of the wake, its influence on both boundary layer separation and
C Rhie   +25 more
core   +2 more sources

HF radar signatures of ship and submarine wakes

open access: yesThe Journal of Engineering, 2019
Radars operating in the HF band have been widely used to detect and track surface ships from their skin echoes; indeed, in many cases this has been the primary mission of the radar.
Stuart J. Anderson
doaj   +1 more source

I do, I understand: engaging distance and campus students in sustainability through active learning

open access: yesResearch in Learning Technology, 2023
Distance online learning connects students to education opportunities without having to be present at the institution offering the learning module. This case study involved development of a dual on-campus and distance course into a fully online course ...
Sarah J. Wakes, Linda. A. Dunn
doaj   +1 more source

Formation of a Propeller Structure by a Moonlet in a Dense Planetary Ring

open access: yes, 2011
The Cassini spacecraft discovered a propeller-shaped structure in Saturn's A ring. This propeller structure is thought to be formed by gravitational scattering of ring particles by an unseen embedded moonlet.
Daisaka   +7 more
core   +1 more source

Helical motion of magnetic flux tubes in the solar atmosphere

open access: yes, 2008
Photospheric granulation may excite transverse kink pulses in anchored vertical magnetic flux tubes. The pulses propagate upwards along the tubes with the kink speed, while oscillating wakes are formed behind the wave front in a stratified atmosphere ...
Hasan   +6 more
core   +1 more source

Home - About - Disclaimer - Privacy