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Additive manufacturing of ceramic acoustic liners for aircraft noise reduction
Nevarez-Saenz, David
Nevarez-Saenz, David
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2022-04-15
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Nevarez-Saenz, David. 2022.
Additive manufacturing of ceramic acoustic liners for aircraft noise reduction -- In Proceedings: 21st Annual Undergraduate Research and Creative Activity Forum. Wichita, KS: Wichita State University, p. 30
Abstract
Noise pollution in large cities has significantly increased in the last couple of
years. The rise of air traffic and electric air taxis will not delay this growth. Solutions to
address the large amounts of noise from turbofan engines are to place honeycomb sound
absorbers made of stainless and aluminum. The location of the acoustic liners is around
the inlet to the combustion chamber. The problem with the current method is that these
sound absorbers cannot withstand high temperatures and high pressures. An alternate
solution is to place fiberglass blankets on the inlet, but they can potentially block airflow.
This paper investigates an inexpensive method to 3D print ceramic porous structures for
noise reduction using a modified extrusion 3D printer. Our solution aims to minimize
cost, design complex geometries, expand scalability, and use ceramic characteristics to
withstand harsh environments on the engines. With a modified version of the Delta
WASP 2040 Clay, sound absorbers are 3D printed with clay-based materials. The
samples are tested using a two-microphone normal incidence impedance tube for acoustic
properties. Our work shows a potential low-cost alternative with 3D printed clay-based
ceramics in the future of acoustic liners.
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Presented to the 21st Undergraduate Research and Creative Activity Forum (URCAF) held at the Rhatigan Student Center, Wichita State University, April 15, 2022.
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Wichita State University
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URCAF
v.21
v.21