As part of this research project, GE scientists will build upon past work with NASA and Lockheed Martin and focus on optimizing engine integration with the aircraft in addition to technologies to reduce fan and jet noise
from the engine itself.
A federal Part 150 study guides land-use planning on and around airports, taking into account the impact of jet noise
, while also enabling airport operators to prepare noise exposure maps.
Residents and business owners opposed to the added air traffic believe increased jet noise
will lower their property values and disrupt the character of neighborhoods surrounding the airport.
I did not see the signals because I was heads-down in the cockpit signing the A sheet, and the jet noise
washed out our ICS.
Some specific subjects include wave packets and turbulent jet noise
, ice-sheet dynamics, flow in foams, growth of cloud droplets in a turbulent environment, spontaneous wave generation in geophysical flows, and sand ripples and dunes.
New nozzle shapes, for instance, can reduce jet noise
at its source, resulting in quieter aircraft.
Moving the engine nacelles forward, the fins inboard and extending the aft deck rearwards are all designed to increase shielding of jet noise
by the airframe when viewed from the ground.
Significant reduction in jet noise
was achieved by producing the same thrust with larger mass flow rate, hence the lower exhaust speed in modern high-bypass engines.
Topics include a brief biography of Lilley, the relation between the generalized acoustic analogy and Lilley's contributions to aeronautics, solving the Lilley equation with quadrupole and dipole jet noise
sources, hot jets and sources of jet noise
, wave packet modules for large-scale mixing noise, and plasma actuators for noise control.
After the FAA nixed a nighttime curfew for passenger jets at Bob Hope Airport, officials have taken their quest to cut jet noise
to a new audience: the airlines themselves.
The margin was a distance, 30 lengthsplus, and the roar that greeted the great one probably drowned out the jet noise
from nearby Heathrow.
Haneda had initially expected to begin the long-distance international flights only from midnight to the early morning hours when Narita is closed for jet noise