Results 31 to 40 of about 189,612 (149)
Engineering Applications of Computational Fluid Mechanics, 2021 The coupled rotor/ship flowfield is investigated using the Navier–Stokes solver when the helicopter rotor hovers in the ship’s airwake. The solid rotor model (SRM) and virtual rotor model (VRM) are employed, considering the different types of rotor ...
Zhao Dingxuan +3 more
doaj +1 more source
The influence of helicopter tail rotor parameters on RCS
Hangkong gongcheng jinzhanHigh requirements have been placed on the stealth performance of armed helicopters during wartime missions，in order to reduce the probability of the helicopter being found during the task，based on geometric optics method and consistent diffraction theory，
ZHAO Qijun
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RESULTS OF THE FIRST MI-171A2 FLYING LABORATORY TEST PHASE
Научный вестник МГТУ ГА, 2014 The present publication describes the results of the first stage of the flying laboratory (Mi-171 helicopter) flight tests performed at Mil Moscow Helicopter Plant, JSC facilities. Main rotor components with blades made of polymer composite materials and
V. A. Ivchin, K. Y. Samsonov
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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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Научный вестник МГТУ ГАThe work is dedicated to numerical modeling of Kamov Ka-226 helicopter aerodynamics for isolated helicopter airframe and helicopter airframe with coaxial main rotor.
S. G. Konstantinov +2 more
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Early plasma administration in traumatic brain injuries: A systematic review
Transfusion, EarlyView.Abstract Background Early plasma may improve trauma resuscitation by addressing shock and coagulopathy, but its role in traumatic brain injury (TBI) remains uncertain. This systematic review evaluated early plasma in TBI. Methods This review followed Cochrane methodology and was registered in PROSPERO (CRD420261357882).
Umair Tahir +7 more
wiley +1 more source
Influence of blade aerodynamic model on prediction of helicopter rotor aeroacoustic signatures [PDF]
, 2011 Brown’s vorticity transport model has been used to investigate how the local blade aerodynamic model influences the quality of the prediction of the high-frequency airloads associated with blade–vortex interactions, and thus the accuracy with which the ...
Kelly, Mary E., Brown, Richard
core +4 more sources
Prioritizing Risk Factors in Helicopter Ditching Using Fuzzy Analytic Hierarchy Process
Applied Research, Volume 5, Issue 5, October 2026.A Fuzzy Analytic Hierarchy Process (FAHP) identified system failure and human factors as the most critical helicopter ditching risks, providing an evidence‐based framework for improving operational risk assessment, emergency preparedness, and aviation safety.
Adenen Aziz +4 more
wiley +1 more source
Earth and Space Science, Volume 13, Issue 10, October 2026.Abstract This study investigates clear‐air turbulence that triggered a helicopter accident in the lee of a mountain range near Koriyama, Japan, on 1 February 2020. Using numerical weather prediction models with horizontal resolutions of 1 km and 100 m, we examined the environmental conditions and mechanisms responsible for the turbulence.
J. Ito, H. Niino, K. Saito, K. Okuyama
wiley +1 more source
The effect of rotor design on the fluid dynamics of helicopter brownout [PDF]
, 2009 Helicopters operating close to the ground in dusty environments tend to generate large clouds of dust in the surrounding air. These clouds can obscure the pilot's view of the ground and lead to a dangerous condition known as brownout.
Brown, R.E. +4 more
core +3 more sources