Acoustic imaging of aircraft wake vortex dynamics

Wang, Frank; Wassaf, Hadi; Gulsrud, Andrew; Delisi, Donald P.; Rudis, R. P.; John A. Volpe National Transportation Systems Center (U.S.); NorthWest Research Associates, Inc., Bellvue, WA; Aviation Turbulence Research, Burlington, MA

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Acoustic imaging of aircraft wake vortex dynamics

2005-06-01
By Wang, Frank ; Wassaf, Hadi ; Gulsrud, Andrew ; ...

[PDF-1.36 MB]

English

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Creators:

Wang, Frank ; Wassaf, Hadi ; Gulsrud, Andrew ; Delisi, Donald P. ; Rudis, R. P.

Wang, Frank ; Wassaf, Hadi ; Gulsrud, Andrew ; Delisi, Donald P. ; Rudis, R. P. Less -
Corporate Creators:

John A. Volpe National Transportation Systems Center (U.S.) ; NorthWest Research Associates, Inc., Bellvue, WA ; Aviation Turbulence Research, Burlington, MA

John A. Volpe National Transportation Systems Center (U.S.) ; NorthWest Research Associates, Inc., Bellvue, WA ; Aviation Turbulence Research, Burlington, MA Less -
Subject/TRT Terms:

[+]

Acoustic Emission Aircraft Laser Radar Microphones Phased Arrays Sound Vortices Wakes
Publication/ Report Number:

AIAA 2005-4849
Resource Type:

Proceedings
Geographical Coverage:

United States
Corporate Publisher:

American Institute of Aeronautics and Astronautics
NTL Classification:

NTL-AVIATION-AVIATION;NTL-AVIATION-Aviation Energy and Environment;
Abstract:

The experience in utilizing a phased microphone array to passively image aircraft wake

vortices is highlighted. It is demonstrated that the array can provide visualization of wake

dynamics similar to smoke release or natural condensation of vortices. Examples on how the

technique has been integrated with other data to address some of the research issues in wake

vortices are documented. These topics include the initial vortex spacing characterization,

collaboration with simultaneous pulsed Lidar data to provide a more complete understanding of

vortices at a late stage in their evolution, and correlation between atmospheric turbulence with

the time-scale involved for vortices developing into a very contorted state. In addition, the

paper provides a comparison between the vortex tracks as inferred from their acoustics

characteristics vs. those detected from the velocity field (i.e., pulsed Lidar). A preliminary

attempt is also made to examine the global link between wake vortex sound and vortex

circulation, suggesting that there could be a power law relationship between the two datasets.
Format:

PDF
Collection(s):

Volpe Center
Main Document Checksum:

[+]

urn:sha256:32d4e79bc418f9e45eee5229a9eca3893fba00060605e2608b9e5d7d5483a657
Download URL:

https://rosap.ntl.bts.gov/view/dot/8955/dot_8955_DS1.pdf
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Acoustic imaging of aircraft wake vortex dynamics

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