Results 71 to 80 of about 558,955 (240)
Modeling and simulation of one- and two-row six-bladed ducted fans
Научно-технический вестник информационных технологий, механики и оптикиThe problem of simulation of efficient ducted fan type propulsors is considered. From experience of operation of twin blades in fantails of helicopters, it is known that this configuration creates less noise compared to a uniform arrangement of the ...
S. Yu. Dudnikov +4 more
doaj +1 more source
Numerical study on parametrical design of long shrouded contra-rotating propulsion system in hovering [PDF]
, 2011 The parametrical study of Shrouded Contra-rotating Rotor was done in this paper based on 2D axisymmetric simulations. The calculations were made with an actuator disk as double rotor model.
Barènes, Roger +3 more
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Ontogeny of murine bony semicircular canal form
The Anatomical Record, EarlyView.Abstract The labyrinthine geometry and functional anatomy of the semicircular canals have intrigued scientists for decades, and there has been considerable interest in understanding how these complex structures grow and develop with evidence emerging from human studies that size maturation occurs exceptionally early by comparison with other systems ...
Marcela Cárdenas‐Serna +1 more
wiley +1 more source
Unsteady aerodynamics of advanced ducted fan
, 1996 A three-dimensional linear frequency domain panel method has been extended to study the unsteady aerodynamics, aeroelasticity, and aeroacoustics of advanced ducted fans.
Huang, Wen-Liang
core +1 more source
Design and analysis of a ducted fan UAV [PDF]
, 2011 The ducted fan unmanned aerial vehicle (UAV) can operate in vertical flight and horizontal flight. A new tilt-body ducted fan UAV with wings, which is capable of high-speed forward flight in wing-borne mode, is designed.
Hongming Cai, Haisong Ang
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On dynamic characteristics and stability analysis of the ducted fan unmanned aerial vehicles
International Journal of Advanced Robotic Systems, 2019 This article researches the improvement of dynamics stability of the ducted fan unmanned aerial vehicles by optimizing its mechanical–structure parameters.
Cheng Chen +3 more
doaj +1 more source
The Anatomical Record, EarlyView.Abstract The Upper Cretaceous São José do Rio Preto Formation (Bauru Group, southeastern Brazil) has yielded a fragmentary but taxonomically diverse record of titanosaur sauropods, although elements from cervical series remain scarce. Here, we describe a nearly complete sauropod axis from the Vila Ventura Paleontological Area, representing an uncommon ...
Bruno A. Navarro +7 more
wiley +1 more source
Preliminary design and evaluation of a ducted-fan type pipeline robot
ROBOMECH JournalPipelines are crucial infrastructure supporting human life, yet their maintenance costs are substantial, necessitating the development of time-efficient robotic systems.
Shota Miyake +3 more
doaj +1 more source
Acoustic Power Transmission Through a Ducted Fan [PDF]
, 2016 For high-speed ducted fans, when the rotor flowfield is shock-free, the main contribution to the inlet radiated acoustic power comes from the portion of the rotor stator interaction sound field that is transmitted upstream through the rotor.
Envia, Ed
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Rethinking brachycephaly: Anatomical implications and health considerations in lagomorphs
The Anatomical Record, EarlyView.Abstract Brachycephaly in domestic rabbits is increasingly perceived by welfare organizations as associated with significant health complications, particularly oral pathologies. Despite this perception, comparative anatomical research into rabbit brachycephaly is limited compared to that of dogs and cats, compelling an in‐depth examination of its ...
Helaina Cressy +3 more
wiley +1 more source