Chicago Tribune Source for both image, introduction and Opening Link
By Phil Geib,@ChiTribGraphics
"In an effort to curb noise pollution and design quieter jet engines, engineers at Argonne National Laboratory in Lemont are working with engine manufacturer General Electric, using high-performance computers to study how engines make noise."
Relative noise making is the bane of most piston engine and jet engines. What goes on inside the cabin is relative quiet, and way louder than outside. Even when wind slices by at 550 Nautical Miles Per Hour is, noise approaching, any customer, but is seldom heard inside the cabin. Even when standing a quarter mile away, a jet take-off is a terrifying sound. The Argonne Lab is weighing-in with its super computer as it models a low decibel configuration found for jet engines. It is a lab driven attempt at mitigating energy driven noise, and wind flows through the modern Gen X engines. The importance is shaping the sound signature through the engine. The computer will identify the causal aspects of source noise and seek a dampening course from its noise source, through a dynamic process of noise shaping from its noise source points. Argonne will find how to configure the decibels released from the engines massive power.
Above is the the Chicago Tribune graphic of the noise footprint in a typical airport setting. The 4.3 square miles typically projects sound clear out into some suburb or downtown hotel chain strapped along side of an airport.Argonne is testing through its super computer modeling on both the source of noise and the mitigation of noise.
Remember seeing these sound canceling optimization examples in everyday life. Noise canceling ear phones, whisper quiet internal combustion luxury cars, and sound canceling berms around neighbor hoods with sound proof fences. The list goes on. Argonne is attacking the noise generation of the new and modern carbon parted jet engine. The culprits are fan blades, compressors, and immense horse power generated. When on construction projects during winter. We ran propane heaters with an open blow torch in an unfinished building to keep warm or when drying drywall or the paint. The sound was ear deafening from just one minuscule burner. Imagine 70,000 pounds of thrust coming from one 787 engine, let alone two engines spooled up for take-off.
That's what Argonne is talking about. GE has invested large capital on the chevron design engine cowlings for its GENX family of Jet engines. They have gone internal with quiet composite fan blade design. GE also has done so much more taming the beast down below the 100 decibel "angst" limit. The object of its affection is just a swoosh going over head at full power.
"In an effort to curb noise pollution and design quieter jet engines, engineers at Argonne National Laboratory in Lemont are working with engine manufacturer General Electric, using high-performance computers to study how engines make noise."
Relative noise making is the bane of most piston engine and jet engines. What goes on inside the cabin is relative quiet, and way louder than outside. Even when wind slices by at 550 Nautical Miles Per Hour is, noise approaching, any customer, but is seldom heard inside the cabin. Even when standing a quarter mile away, a jet take-off is a terrifying sound. The Argonne Lab is weighing-in with its super computer as it models a low decibel configuration found for jet engines. It is a lab driven attempt at mitigating energy driven noise, and wind flows through the modern Gen X engines. The importance is shaping the sound signature through the engine. The computer will identify the causal aspects of source noise and seek a dampening course from its noise source, through a dynamic process of noise shaping from its noise source points. Argonne will find how to configure the decibels released from the engines massive power.
Above is the the Chicago Tribune graphic of the noise footprint in a typical airport setting. The 4.3 square miles typically projects sound clear out into some suburb or downtown hotel chain strapped along side of an airport.Argonne is testing through its super computer modeling on both the source of noise and the mitigation of noise.
Remember seeing these sound canceling optimization examples in everyday life. Noise canceling ear phones, whisper quiet internal combustion luxury cars, and sound canceling berms around neighbor hoods with sound proof fences. The list goes on. Argonne is attacking the noise generation of the new and modern carbon parted jet engine. The culprits are fan blades, compressors, and immense horse power generated. When on construction projects during winter. We ran propane heaters with an open blow torch in an unfinished building to keep warm or when drying drywall or the paint. The sound was ear deafening from just one minuscule burner. Imagine 70,000 pounds of thrust coming from one 787 engine, let alone two engines spooled up for take-off.
That's what Argonne is talking about. GE has invested large capital on the chevron design engine cowlings for its GENX family of Jet engines. They have gone internal with quiet composite fan blade design. GE also has done so much more taming the beast down below the 100 decibel "angst" limit. The object of its affection is just a swoosh going over head at full power.
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