Spectral characteristics of wake vortex sound during roll-up

Zhang, Yan; Wang, Frank Y.; Hardin, J. C.; Langley Research Center; John A. Volpe National Transportation Systems Center (U.S.)

Advanced Search

Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

Advanced Search
Custom Query

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Clear All

Query Builder

Query box

Clear All

For additional assistance using the Custom Query please check out our Help Page

i

Spectral characteristics of wake vortex sound during roll-up

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

[PDF-531.47 KB]

English

Details You May Also Like

Details:

Creators:

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

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

Langley Research Center ; John A. Volpe National Transportation Systems Center (U.S.)

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

[+]

Acoustic Emission Aircraft Aircraft Wake Fourier Transforms Sensors Spectrum Analysis Vortex Noise Vortex Sound Vortices Wakes
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
Collection(s):

Volpe Center
Main Document Checksum:

[+]

urn:sha256:a2c36c5a22add517338d8daa57de3160bbafd640dd4cf61ea5c61e550fbca270
Download URL:

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

No Additional Files

More +

Spectral characteristics of wake vortex sound during roll-up

Details:

Supporting Files

You May Also Like