What is it about?
Devices called acoustic dampers are often installed in jet and rocket engines to reduce noise. The conditions inside a jet or rocket engine are hot and loud, and the sound waves can form spinning patterns. To understand how well an acoustic damper will work in a jet or rocket engine, it is important to measure it in a laboratory under similar conditions. This paper describes how to build an experimental facility for measuring acoustic dampers in hot and loud conditions with spinning sound waves. Additionally, this paper describes a method to determine how accurate the measurements are.
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This page is a summary of: Designing a Facility for Measuring Higher-Order Acoustic Modes in Uniform Heated Flows, AIAA Journal, December 2021, American Institute of Aeronautics and Astronautics (AIAA), DOI: 10.2514/1.j060844.
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