Jet engine noise reduction on-demand webinar Ducted fan noise reduction How simulation can support the design of quieter aircraft engines Estimated Watching Time: 60 minutes Share Access as a guest or sign in to your Siemens account First Name * Last Name * Email Address * Country * Compan...
Liner for Jet Engine Noise ReductionIntroduction, I
Apparatus, method and system for gas turbine engine noise reduction An apparatus for reducing gas turbine engine noise, such as noise generated by an aircraft gas turbine engine, comprises at least one and preferably a plurality of gas injectors for injecting gas such as high pressure engine ...
The noise reduction system includes active noise control to suppress fan tone noise of an airplane flyover noise signature. The active noise control includes microphones with acoustic transducers upstream and downstream of the engine fan and fan exit guide vane stage to sense control system errors. ...
noise from a gas turbine engine doesnotincrease consistently as power is increased. This is due to the impact of handling bleed valves and local fan noise maxima, which can create local noise peaks, even at lower power settings. The innovation proposed is to operate different engines on the ...
A jet engine has a noise reduction system which reduces the boundary layer located on the outer surface of the nacelle. The noise reduction system includes a plurality of openings located in the outer surface of the nacelle which are in communication with a source of low pressure. The low pre...
For commercial jet aircraft the jet noise has reduced from the turbojet through bypass engines to turbofans as a result of a progressive reduction in propelling jet velocities. For example, the JT8D, a bypass engine, has a jet velocity of 400 m/s (1,450 ft/s) whereas the JT9D, a ...
reducerA ste of gear reduction mechanism adopted by geared turbofan engine which made fan rotate at the ideal low speed with assuring high speed of low ... Li Jie - 《Aeroengine》 被引量: 6发表: 2009年 ENGINE NOISE REDUCER FOR VEHICLE PROBLEM TO BE SOLVED: To provide an engine noise re...
The proposed methodology described with vetting will be considered as an US military standard (MILSTD) with possible later consideration as American standard measurement technique to describe noise fields for personnel noise exposure and for measuring the performance of jet engine noise reduction ...
For this reason, the fluidic shield is wider and is therefore more impermeable to the flow outside the wall of the jet engine. The noise reduction obtained by this arrangement of the ducts therefore is increased. Moreover, since the jets are not convergent, they do not generate spurious inte...