NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Modeling of transition and surface roughness effects in boundary-layer flowsExperiments were carried out to examine the influence of three-dimensional, stochastic roughness on the growth of incompressible turbulent boundary layers, as well as the effect of streamwise pressure gradients and freestream turbulence intensity on smooth-wall boundary-layer transition. The modeling of these effects in a two-dimensional boundary-layer computation program was examined with the help of the experiments. A model for surface roughness was developed that relates directly measurable statistical parameters quantifying the roughness geometry to the aerodynamic effects. This model should be valid for a limited class of surfaces found on turbomachinery blading and in other engineering applications. Commonly used criteria for the transition onset performed poorly and presumably need to be modified to account for other factors influencing the process.
Document ID
19870031661
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Feiereisen, W. J.
(NASA Ames Research Center Moffett Field, CA; Brown Boveri et Cie. AG, Baden, Switzerland)
Acharya, M.
(Brown Boveri et Cie. AG Baden, Switzerland)
Date Acquired
August 13, 2013
Publication Date
October 1, 1986
Publication Information
Publication: AIAA Journal
Volume: 24
ISSN: 0001-1452
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
87A18935
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available