Results 61 to 70 of about 4,154,170 (239)
Fundamentals of Innovative Aircraft Heat Exchanger Integration for Hydrogen–Electric Propulsion
AerospaceThe potential of utilizing the rejected heat of a fuel cell system to improve the aircraft propulsive efficiency is discussed for various flight conditions. The thermodynamic background of the process and the connection of power consumption in the fan of
Bernhard Gerl +3 more
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Design of a Control System for an Organic Flight Array Based on a Neural Network Controller
International Journal of Aerospace Engineering, 2018 This paper presents a flight control system for an organic flight array (OFA) with a new configuration consisting of multimodularized ducted-fan unmanned aerial vehicles.
Bokyoung Oh +3 more
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A Computer Program for the Prediction of Ducted Fan Performance [PDF]
Manual for computer program for predicting performance of ducted ...
Mendenhall, Michael R. +1 more
core +1 more source
Cam-Operated Pitch-Change Apparatus [PDF]
, 1978 A pitch-change apparatus for a ducted thrust fan having a plurality of variable pitch blades employs a camming ring mounted coaxially at the hub at an axially fixed station along the hub axis for rotation about the hub axis both with the blades and ...
Barnes, P. E.
core +1 more source
Theoretical Study of Ducted Fan Performance [PDF]
Existing computer program improved capability for predicting performance of ducted fan in uniform axial ...
Mendenhall, M. R., Spangler, S. B.
core +1 more source
Performance validation of the Caltech ducted-fan at a fixed operating point [PDF]
, 1999 Using measured input and output data and a priori assumptions on a nominal model and a linear fractional transformation uncertainty structure, a family of model validating uncertainty sets are constructed for robust control analysis and design of the ...
Doyle, John, Lim, Kyong, Trotoux, Marc
core
Predicted and Measured Modal Sound Power Levels for a Fan Ingesting Distorted Inflow [PDF]
Refinements have been made to a method for estimating the modal sound power levels of a ducted fan ingesting distorted inflow. By assuming that each propagating circumferential mode consists only of a single radial mode (the one with the highest cut-off ...
Figure +4 more
core +2 more sources
Research on the Aerodynamic–Propulsion Coupling Characteristics of a Distributed Propulsion System
Applied SciencesIn recent years, the distributed propulsion system has received extensive attention due to its advantages such as high propulsion efficiency, low noise, high safety redundancy, and good flexibility and maneuverability.
Xiaojun Yang, Tao Liu, Wei Jia
doaj +1 more source
, 2012 published_or_final_version ; Mechanical Engineering ; Master ; Master of ...
openaire +2 more sources
Variable geometry aft-fan for takeoff quieting or thrust augmentation of a turbojet engine [PDF]
A concept is presented that combines the low-noise and high-thrust characteristics of a turbofan at takeoff, together with its high efficiency at subsonic flight speeds, with the high efficiency of a turbojet at supersonic cruise.
Evans, D. G., Weber, R. J.
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