Continuous-Scan Phased Array Measurement Methods for Turbofan Engine Acoustic Testing, Phase II

Metadata Updated: November 12, 2020

To allow aviation growth to continue in the face of increasingly stringent noise pollution standards, new aircraft engines must be designed with noise performance as a principal constraint. Technologies to realize future propulsion noise reduction will require detailed experimental characterization and diagnosis of the acoustic mechanisms and sources within an engine system or component. ATA Engineering, Inc. (ATA) proposes an SBIR project to further develop and validate methods for obtaining phased array acoustic data from complex distributed noise sources using continuously moving, or continuous-scan (CS) microphones in conjunction with state-of-the-art phase-referencing techniques. The benefits of the CS method include (1) effectively infinite spatial resolution, as the sound field cross-spectrum may be described between any two locations along the scan trajectory, (2) preservation of phase data for improved source and propagation modeling, including beamforming (BF) and acoustical holography (AH), (3) significant reduction of test data acquisition time (potentially two to ten times faster) per operational point, and consequently either (4) reduced test operational cost, or (5) the opportunity to screen more design concepts within a given budget. The Phase II effort will use subscale aeroacoustic testing to validate the novel continuous-scan beamforming (CSBF) measurement techniques with the aim of eventual implementation in NASA acoustic wind tunnel and free-jet testing facilities. ATA will also formalize a CS software toolkit for data processing and visualization and design a full-scale array concept for a candidate NASA wind tunnel facility.

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Publisher Space Technology Mission Directorate
Unique Identifier Unknown
Identifier TECHPORT_93426
Data First Published 2019-04-01
Data Last Modified 2020-01-29
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Homepage URL
Program Code 026:027
Source Datajson Identifier True
Source Hash 88c5c96eb373ebedf09006fd1f768869f9aa7062
Source Schema Version 1.1

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