An Anechoic Aeroacoustic Test Facility
Abstract
The University of Florida has completed the construction of an advanced aeroacoustics testbed to facilitate both existing and future Air Force/DoD research projects. The proposed facility consists of a versatile anechoic chamber processing a test volume of 18'0'L x 16' 6" W x 7' 8" H and a low-frequency cutoff of 100 Hz. The facility leverages a recently completed high-pressure air facility to provide supersonic (and subsonic) jet flows. In addition, the chamber has removable floor wedges to provide either anechoic or semi-anechoic test environments. The facility is equipped with a 5 DOF traverse to allow a myrid of detailed flow, noise, and vibration measurements. In particular, the experimental capabilities of this facility include flow measurements via PIV, LDV, and hot-wire anemometry, automated sound-intensity mapping and source localization capabilities via beam forming arrays, and complete surface vibration characterization vibrometry. The facility provides a unique capability to study fundamental aeroacoustic problems and structure-borne noise phenomena. The uniqueness stems from the combination of a low cutoff frequency (100 Hz), large chamber size, a high-speed flow capability, the ability to switch between a semi-and fully-anechoic chamber, and advanced instrumentation flow, acoustic, and vibration measurements. Most existing anechoic chambers, particularly the few available at universities, have only some of these features, thereby limiting their utility.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 2001
- Accession Number
- ADA399240
Entities
People
- Bruce Carroll
- Louis N Cattafesta
- Mark Sheplak
- Paul Hubner
Organizations
- University of Florida