Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 8 of 8 for “"Bypass Duct"”.
-
Aerodynamics of a fan bypass duct system
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2001.
-
Extension of Particle Image Velocimetry to Full-Scale Turbofan Engine Bypass Duct Flows
… engine design is increasing to the point that bypass duct geometry is becoming a significant contributor and could ultimately become a limiting factor. To investigate this, a number of methods are available to provide qualitative and quantitative analysis of the flow around the loss mechanisms …
-
Acoustic optimisation and prediction of sound propagation in turbofan engine ducts
… and<br/>radiation in turbofan engine intakes and bypass ducts, and the optimisation of noise attenuation<br/>by using acoustic liners. A commercial FE/IE code ACTRAN/TM is used<br/>within two shell programs; B-induct for bypass ducts and ANPRORAD for intake ducts.<br/><br/>An automated liner …
-
Predicting fan noise propagation in aeroengine bypass ducts
… of rearwards fan noise propagation within the bypass duct and its radiation into the far feld. Two recently developed models: B-induct and GXMunt, are exploited in application to real engine bypass ducts and their performance is evaluated. These methods are an improvement on current industry …
-
Wind tunnel testing of a nacelle bypass concept for a quiet supersonic aircraft
… by Gulfstream Aerospace Corporation for the production of low-noise supersonic aircraft is the high-flow nacelle bypass concept in which an outer nacelle surface is used to encircle the asymmetric external engine protuberances of a traditional turbine engine. Although this bypass flow may reduce …
-
Installation Effects on Variable Pitch Fans
… to a recirculating jet penetrating into the bypass duct, forming large recirculation regions between the rotor and the bypass inlet. The recirculation regions significantly restrict the net mass flow through the engine and the fan is regarded as stalled in this particular state. It is found …
-
Prediction and control of sound propagation in turbofan engine bypass ducts
… the propagation of sound in acoustically lined ducts<br/>with flow. The motivation for this work is the requirement to predict the sound attenuation of<br/>acoustic liners in the bypass duct of modern turbofan aeroengines. The liners provide the most<br/>effective means with which to suppress …
-
Effect of BLI-Type Inlet Distortion on Turbofan Engine Performance
… distortion. Flow measurements at the AIP and the bypass nozzle exit plane provided information about the losses throughout the fan flow path. The presence of the distortion screen resulted in a 24% increase in mass-averaged entropy production along the entire fan flow path compared to the …