Results 41 to 50 of about 54,340 (264)
Nihon Kikai Gakkai ronbunshu, 2020 The flow and performance of a rotor of a Savonius hydraulic turbine provided with a shield plate were analyzed by the two-dimensional simulations. The rotor diameter DR is 142 mm, and the Reynolds number based on the velocity of the main flow U0, U0DR/ν,
Kotaro TAKAMURE +5 more
doaj +1 more source
Aeroacoustic analysis of main rotor and tail rotor interaction [PDF]
, 2008 The increased restrictions placed on helicopter noise levels over recent decades have encouraged\ud manufacturers to better understand tail rotor noise and its aerodynamic sources. A\ud generic single main rotor and tail rotor helicopter has been simulated in high speed forward,\ud and quartering, flight using the Vorticity Transport Model.
Fletcher, T.M. +2 more
openaire
Resolving Heterogeneity of Targeted Lipid Nanoparticles Through Solution‐Based Biophysical Analyses
Advanced Materials, EarlyView.AF4‐UV‐DLS‐MALS‐SAXS resolves previously inaccessible targeted lipid nanoparticle (tLNP) subpopulations that differ in size, shape, and composition. Correlation of subpopulation‐resolved biophysical properties with in vivo RNA delivery reveals that targeted placental transfection is associated with distinct tLNP subpopulations rather than ensemble ...
Hannah C. Geisler +14 more
wiley +1 more source
Advanced Materials Interfaces, EarlyView.Dynamic mechanical loading of outer meniscus fibrochondrocytes increases extracellular vesicle (EV) yield and alters EV composition. When applied to progenitor cells, these mechanically primed EVs modulate the expression of matrix‐related genes.
Catherine Cheung +6 more
wiley +1 more source
Main rotor-body action for virtual blades model
EPJ Web of Conferences, 2018 This research aims to investigate a virtual blade model and assess rotor influence on helicopter fuselage aerodynamics. The rotor disk is discretized in the azimuthal direction, and a time-varied pressure jump is applied in regions occupied by the blades.
Kusyumov Alexander +6 more
doaj +1 more source
Collision‐Resilient Winged Drones Enabled by Tensegrity Structures
Advanced Robotics Research, EarlyView.Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui +5 more
wiley +1 more source
Доклады Белорусского государственного университета информатики и радиоэлектроники, 2019 A novel measurement method for repetition frequencies of the blades of an aerial vehicle (in part, helicopter's main and tail rotor) for adaptation circuits of the radar sensor with an inverse synthesis of antenna aperture is proposed.
S. R. Heister, T. T. Nguyen
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Известия высших учебных заведений России: РадиоэлектроникаIntroduction. The most common helicopters are those based on a single rotor design, each with a main rotor and a tail rotor. Radar images of helicopter rotors, combined with their rotational speeds, contain information that allows the helicopter type to ...
Sergey R. Heister, Valery V. Kirichenko
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Nonlocomotory Robotic Strategies for Dynamic Rotation Control in Terrestrial Robots: A Review
Advanced Robotics Research, EarlyView.Terrestrial robots increasingly require rapid body rotation to maintain stability and agility in complex environments. This review shows nonlocomotory rotational control strategies that operate without ground contact, including reaction wheels, tails, bars, limbs, and thrusters.
Y. Liang +14 more
wiley +1 more source
PRESSURE THEORY OF HELICOPTER ROTOR
Advanced Engineering Research, 2011 A new theory of determining the principal aerodynamic characteristics of the propeller is offered.
Sergey P. Lisin
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