Actions for Use of multiple discrete wall jets for delaying boundary layer separation

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Use of multiple discrete wall jets for delaying boundary layer separation

Author
Mclean, J. D.
Published
Jun 1, 1974.
Physical Description
1 electronic document
Additional Creators
Herring, H. J.
Online Version

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Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access
Summary
The effectiveness of a spanwise array of small discrete blowing nozzles in preventing separation of a turbulent boundary layer was investigated experimentally. The spacing, axial location, and momentum flux of the nozzles were varied in a systematic way, and overall performance was measured for each combination. Extensive mean velocity profiles were measured for one selected combination. Overall diffusion achieved before separation was correlated successfully with a momentum flux excess parameter, and in terms of this parameter discrete nozzles, when advantageously placed, were found to perform somewhat better than an optimally placed two-dimensional jet slot.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19740017696.
Accession ID: 74N25809.
NASA-CR-2389.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15744566