Abstract

Since the 1950s the jet aeroacoustics community has been involved in predicting and measuring the noise distribution in jets. In this work, cylindrical and planar Fourier near-field acoustical holography are used to investigate radiation from a full-scale, installed jet engine. Practical problems involving measurement aperture and the highly directional nature of the source are addressed. Insights from numerical simulations reveal usable reconstruction regions. A comparison of cylindrical and planar NAH for the respective measurement apertures shows cylindrical NAH outperforms planar NAH on reconstructions both towards and away from the source.

Degree

MS

College and Department

Physical and Mathematical Sciences; Physics and Astronomy

Rights

http://lib.byu.edu/about/copyright/

Date Submitted

2012-07-20

Document Type

Thesis

Handle

http://hdl.lib.byu.edu/1877/etd5545

Keywords

noise characterization, jet noise, near-field acoustical holography, holography, NAH, source distribution, source characterization, cylindrical NAH, planar NAH, regularization, modified Tikhonov filter, full-scale jet, noise measurements

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