Results 81 to 90 of about 4,154,170 (239)

Application of a three-dimensional viscous transonic inverse method to NASA rotor 67 [PDF]

open access: yes, 2002
The development and application of a three-dimensional inverse methodology in which the blade geometry is computed on the basis of the specification of static pressure loading distribution is presented.
Tiow, W.T., Zangeneh, M.
core   +1 more source

Aerodynamic Characteristics of a Ducted Fan System Based on Momentum Source Method

open access: yesJournal of Physics: Conference Series, 2019
Ducted fan systems have received a considerable attention due to their potential for wide application in both civil and military missions. Compared with isolated fans, the presence of duct can substantially weaken the contraction of fan wake and gives ...
Hongmin Cai, G. Ma, Zhongxin Li
semanticscholar   +1 more source

Receding horizon control of vectored thrust flight experiment [PDF]

open access: yes, 2005
: The application of a constrained receding horizon control technique to stabilise an indoor vectored-thrust flight experiment, known as the Caltech ducted fan, is given.
Franz, R.   +3 more
core  

Conceptual Design of Electrical Ducted Fan (EDF)

open access: yesConference SENATIK STT Adisutjipto Yogyakarta, 2019
Electric Ducted Fan (EDF) is an electric propulsion consist of duct, fan and electric motor with main power source is from battery which generates compression air for thrust.
Buyung Junaidin, M. A. Cahyono
semanticscholar   +1 more source

Lifting-line theory for subsonic axial compressor rotors [PDF]

open access: yes, 1972
July 1972Includes bibliographical references (leaf 25)The three-dimensional compressible vortex theory of an axial compressor rotor or ducted fan is extended by relating blade loading to blade geometry in the lifting-line approximation.
Dharwadkar, Shashikant Prabhakar   +1 more
core  

CFD Study of a New Annular Lift Fan Configuration with High Lift Efficiency

open access: yesAerospace, 2017
A new annular lift fan configuration that has very high lift efficiency is explored by using a numerical scheme. The inlet lip radius and diffuser angle are maximized by semicircle duct walls and the location of the lift fan is moved from the throat to ...
Yun Jiang, Bo Zhang
doaj   +1 more source

Kesan penggunaan prosedur pembelajaran kawalan kendiri (self-regulated learning) terhadap pencapaian akademik, kemahiran meta kognitif dan motivasi pelajar politeknik : kajian kes [PDF]

open access: yes, 2019
Pembelajaran Kawalan Kendiri (PKK) merupakan satu strategi pembelajaran efektif yang membantu pelajar untuk kompeten dan mempunyai autonomi dalam diri.
Sahdan, Shafizza
core  

Preliminary Aerodynamic Investigation of Fan Rotor Blade Morphing [PDF]

open access: yes
Various new technologies currently under development may enable controlled blade shape variability, or so-called blade morphing, to be practically employed in aircraft engine fans and compressors in the foreseeable future.
Tweedt, Daniel L.
core   +1 more source

Numerical Analysis of the Effect of S-Shaped Duct Key Geometry Parameters on the Inlet Distortion of Distributed Ducted Fans

open access: yesAerospace
Distributed propulsion systems are strategically placed along the aircraft wingspan to ingest the fuselage boundary layer, thereby enhancing propulsion efficiency.
Wei Jia   +4 more
doaj   +1 more source

An experimental comparison of controllers for a vectored thrust, ducted fan engine [PDF]

open access: yes, 1995
Experimental comparisons between four different control design methodologies are applied to a small vectored thrust engine. Each controller is applied to three trajectories of varying aggressiveness.
Bendotti, Pascale   +3 more
core  

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