Scientists at GE Global Research want to help enable future supersonic
air travel by addressing existing challenges around engine noise. Global
Research, which has a world-class team of research experts in acoustic,
aerodynamic, fluidic, and combustion technologies, will explore new
methods for reducing jet engine noise during takeoffs and landings of
supersonic aircraft as part of a research project with NASA.
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Using high fidelity models like the simulation shown, noise characteristics can be studied and design solutions identified to make supersonic aircraft quieter. Pictured is the flow from an aircraft engine exhaust nozzle showing the complex interactions of the high velocity jets, which generate acoustic waves. (Simulation performed under INCITE program using the Computing Facility at Argonne National Laboratory, which is supported by the Office of Science of the U.S. Department of Energy under contract DE-AC02-06CH11357.)
While achieving an acceptable sonic boom level is viewed as the key
barrier to future supersonic overland flight, noise around airports
during takeoff and landing of high speed aircraft would also be a
challenge. Reducing noise is one of the research priorities of NASA’s
vision to develop commercially viable supersonic transport.
“As a manufacturer of jet engines, wind turbines, and other powerful
machines, we’re always looking for new and better ways to make them run
as quietly as possible,” said Kishore Ramakrishnan, principal
investigator on the NASA program and member of the Aerodynamics and
Acoustics Lab at GE Global Research. “GE has developed extensive high
fidelity simulation tools and design concepts for noise reduction in our
commercial and military engines, and we now plan to leverage that
technology to reduce propulsion noise for this application. We also are
teaming with Lockheed Martin to understand the impact of these concepts
on overall aircraft performance and sonic boom characteristics.”
With the retirement of the Concorde in 2003, supersonic air travel has
ceased to exist in the commercial airline world. Supersonic speeds
exceed the speed of sound at cruising altitudes, which is approximately
660 miles per hour (mph). Aircraft like the Concorde were capable of
flying at twice the speed of sound. Today, a typical subsonic commercial
flight at cruising altitudes flies in the 500-600 mph range.
The primary sources of aircraft noise affecting communities around
airports are the engine and the aerodynamics of the aircraft itself as
it flies through the air. 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.
As one of the world’s leading manufacturer of aircraft engines, GE
brings a deep level of experience and knowledge to aircraft engine
design. GE scientists and engineers also have partnered with NASA at
various times over many decades to support the development of next
generation technologies for air and space
travel.
“It’s truly amazing how far air travel has come over the past century.
It has shrunk the world in ways we could not even have imagined 100
years ago,” said Narendra Joshi, Advanced Technology Program Leader for
propulsion at GE Global Research. “We need to continue to push forward,
and it is great that NASA
is leading the way and supporting industry in developing the
innovations that are needed to make economic supersonic air travel
possible.”
About GE Global Research
GE Global Research is the hub of technology development for all of GE’s
businesses. Our scientists and engineers redefine what’s possible, drive
growth for our businesses, and find answers to some of the world’s
toughest problems. We innovate 24 hours a day, with sites in Niskayuna,
New York; San Ramon, California; Oklahoma City, Oklahoma; Detroit,
Michigan; Bangalore, India; Shanghai, China; Munich, Germany; and Rio de
Janeiro, Brazil. Visit GE Global Research on the web at www.geglobalresearch.com.
Connect with our technologists at www.geglobalresearch.com/blog
and www.twitter.com/geresearch.
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