Spectral characteristics of wake vortex sound during roll-up

Zhang, Yan; Wang, Frank Y.; Hardin, J. C.

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Spectral characteristics of wake vortex sound during roll-up

2003-12-01
By Zhang, Yan ; Wang, Frank Y. ; Hardin, J. C.

File Language:

English

Details

Creators:

Zhang, Yan ; Wang, Frank Y. ; Hardin, J. C.
Corporate Creators:

Langley Research Center ; John A. Volpe National Transportation Systems Center (U.S.)
Subject/TRT Terms:
Publication/ Report Number:

NASA/CR-2003-212673
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

United States. National Aeronautics and Space Administration
Abstract:

This report presents an analysis of the sound spectra generated by a trailing aircraft vortex during its rolling-up process. The ; study demonstrates that a rolling-up vortex could produce low frequency (less than 100 Hz) sound with very high intensity (60 ; dB above threshold of human hearing) at a distance of 200 feet from the vortex core. The spectrum then drops off rapidly ; thereafter. The study suggests that acoustic sensors operating at low frequency band could be profitably deployed for detecting ; the vortex sound during the rolling-up process.
Format:

PDF
Download URL:

https://rosap.ntl.bts.gov/view/dot/9667/dot_9667_DS1.pdf
File Type:

[PDF - 531.47 KB]
Collection(s):

Volpe Center
Main Document Checksum:

urn:sha-512:26cf569ed1167f2fda645ba152952251ddfa59c70c57443aeba1191ae06d631a83521814aa5c6a3cce10f78245a2d685460fbbae8f8206240531483dab42ae40

File Language:

English

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