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ALESEP: A computer program for the analysis of airfoil leading edge separation bubblesThe ALESEP program for the analysis of the inviscid/viscous interaction which occurs due to the presence of a closed laminar transitional separation bubble on an airflow is presented. The ALESEP code provides a iterative solution of the boundary layer equations expressed in an inverse formulation coupled to a Cauchy integral representation of the inviscid flow. This interaction analysis is treated as a local perturbation to a known solution obtained from a global airfoil analysis. Part of the required input to the ALESEP code are the reference displacement thickness and tangential velocity distributions. Special windward differencing may be used in the reversed flow regions of the separation bubble to accurately account for the flow direction in the discretization of the streamwise convection of momentum. The ALESEP code contains a forced transition model based on a streamwise intermittency function and a natural transition model based on a solution of the integral form of the turbulent kinetic energy equation. Instructions for the input/output, and program usage are presented.
Document ID
19840014469
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Davis, R. L. (United Technologies Research Center East Hartford, CT, United States)
Vatsa, V. N. (United Technologies Research Center East Hartford, CT, United States)
Carter, J. E. (United Technologies Research Center East Hartford, CT, United States)
Date Acquired
September 4, 2013
Publication Date
April 1, 1984
Subject Category
Aerodynamics
Report/Patent Number
NASA-CR-172310
NAS 1.26:172310
Accession Number
84N22537
Funding Number(s)
CONTRACT_GRANT: NAS1-16585
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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