Analysis of two-dimensional multi-component airfoils in viscous flows

Dutt, HNV (1987) Analysis of two-dimensional multi-component airfoils in viscous flows. Technical Report. National Aeronautical Laboratory, Bangalore, India.

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Abstract

A method and computer program for analysis of multicomponent airfoils in subsonic, viscous, attached flows are described. The problem is divided into a number of primary task areas, each requiring mathematical modeling and one or more subroutines along with the necessary interfacing logic for digital computation. These are:geometry definition and geometry preprocessing; inviscid analysis;boundary layer solution; combined solution; and determination of overall loads and moments. The inviscid solution is based on an efficient vortex singularity method. The boundary layer solution is comprised of laminar, transition, and turbulent boundary layers in subsonic flow. The combined solution is computed iteratively using the concept of displacement flux by Preston. The overall loads and moments are computed by integrating the pressures. The code was validated13; against a number of cases to bring out its capabilities and13; deficiencies. The results of the study indicate that the multi-element program can provide a valuable insight into a number of areas of high lift airfoil design. (Author)

Item Type: Proj.Doc/Technical Report (Technical Report)
Uncontrolled Keywords: Airfoils;Applications programs (Computers):Boundary layer equations;Life;Mathematical models;Two dimensional flow; Iterative solution;Pressure distribution;Subsonic flow; Viscous flow
Subjects: AERONAUTICS > Aerodynamics
Division/Department: Aerodynamics
Depositing User: M/S ICAST NAL
Date Deposited: 11 Apr 2008
Last Modified: 24 May 2010 09:55
URI: http://nal-ir.nal.res.in/id/eprint/4350

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