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Additional research on instabilities in atmospheric flow systems associated with clear air turbulenceAnalytical and experimental fluid mechanics studies were conducted to investigate instabilities in atmospheric flow systems associated with clear air turbulence. The experimental portion of the program was conducted using an open water channel which allows investigation of flows having wide ranges of shear and density stratification. The program was primarily directed toward studies of the stability of straight, stratified shear flows with particular emphasis on the effects of velocity profile on stability; on studies of three-dimensional effects on the breakdown region in shear layers; on the the interaction of shear flows with long-wave length internal waves; and on the stability of shear flows consisting of adjacent stable layers. The results of these studies were used to evaluate methods used in analyses of CAT encounters in the atmosphere involving wave-induced shear layer instabilities of the Kelvin-Helmholta type. A computer program was developed for predicting shear-layer instability and CAT induced by mountain waves. This technique predicts specific altitudes and locations where CAT would be expected.
Document ID
19720012672
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Stoeffler, R. C. (United Aircraft Corp. East Hartford, CT, United States)
Date Acquired
September 2, 2013
Publication Date
April 1, 1972
Publication Information
Publisher: NASA
Subject Category
Fluid Mechanics
Report/Patent Number
NASA-CR-1985
Accession Number
72N20322
Funding Number(s)
CONTRACT_GRANT: NASW-1582
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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