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Patterns in the sky: Natural visualization of aircraft flow fieldsThe objective of the current publication is to present the collection of flight photographs to illustrate the types of flow patterns that were visualized and to present qualitative correlations with computational and wind tunnel results. Initially in section 2, the condensation process is discussed, including a review of relative humidity, vapor pressure, and factors which determine the presence of visible condensate. Next, outputs from computer code calculations are postprocessed by using water-vapor relationships to determine if computed values of relative humidity in the local flow field correlate with the qualitative features of the in-flight condensation patterns. The photographs are then presented in section 3 by flow type and subsequently in section 4 by aircraft type to demonstrate the variety of condensed flow fields that was visualized for a wide range of aircraft and flight maneuvers.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Special Publication (SP)
Campbell, James F.
(NASA Langley Research Center Hampton, VA, United States)
Chambers, Joseph R.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1994
Subject Category
Aeronautics (General)
Report/Patent Number
NAS 1.21:514
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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