Acoustic imaging of aircraft wake vortex dynamics

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

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Acoustic imaging of aircraft wake vortex dynamics

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

File Language:

English

Details

Creators:

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

John A. Volpe National Transportation Systems Center (U.S.) ; NorthWest Research Associates, Inc., Bellvue, WA ; Aviation Turbulence Research, Burlington, MA
Subject/TRT Terms:
- Aircraft
- Wakes
- Vortices
- Microphones
- Phased arrays
- Laser radar
- Sound
- Acoustic emission
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
Download URL:

https://rosap.ntl.bts.gov/view/dot/8955/dot_8955_DS1.pdf
File Type:

[PDF - 1.36 MB]
Collection(s):

Volpe Center
Main Document Checksum:

urn:sha256:32d4e79bc418f9e45eee5229a9eca3893fba00060605e2608b9e5d7d5483a657

File Language:

English

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