NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Persistent Structures in the Turbulent Boundary LayerPersistent structures in the turbulent boundary layer are located and analyzed. The data are taken from flight experiments on large commercial aircraft. An interval correlation technique is introduced which is able to locate the structures. The Morlet continuous wavelet is shown to not only locates persistent structures but has the added benefit that the pressure data are decomposed in time and frequency. To better understand how power is apportioned among these structures, a discrete Coiflet wavelet is used to decompose the pressure data into orthogonal frequency bands. Results indicate that some structures persist a great deal longer in the TBL than would be expected. These structure contain significant power and may be a primary source of vibration energy in the airframe.
Document ID
20050199063
Acquisition Source
Langley Research Center
Document Type
Other
Authors
Palumbo, Dan (NASA Langley Research Center Hampton, VA, United States)
Chabalko, Chris (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2005
Subject Category
Aircraft Design, Testing And Performance
Meeting Information
Meeting: 11th AIAA/CEAS Aeroacoustics Conference
Location: Monterey, CA
Country: United States
Start Date: May 23, 2005
End Date: May 25, 2005
Sponsors: Confederation of European Aerospace Societies, American Inst. of Aeronautics and Astronautics
Funding Number(s)
OTHER: 23-781-10-13
Distribution Limits
Public
Copyright
Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available