Separated diffuser flow analysis, volume 1
Abstract
This report describes a finite difference computer program TASED (Turbulent Annular SuddenExpansion Diffuser), which predicts flow properties in an axisymmetric annular duct of arbitrary shape which contains an arbitrarily shaped axisymmetric annular centerbody in the duct exit. The centerbody may contain openings through which air is allowed to flow. A twoequation TKL (Turbulent Kinetic Energy and Length Scale) turbulence model is used which was specifically developed for separated recirculation flows. The calculation procedure is programmed in the FORTRAN IV language and has operated successfully on the IBM 370, CDC, CYBER 750, and DEC VAX 11/780 computers. This report presents the equations which form the analytical basis for the TASID computer program and describes the resulting computer program including the input preparation and the resulting computer program including the input preparation and the resulting output. A comparison is made between experimental data and calculated results for several test cases.
 Publication:

Final Report
 Pub Date:
 September 1981
 Bibcode:
 1981dda..rept.....S
 Keywords:

 Boundary Layer Separation;
 Computational Fluid Dynamics;
 Ducted Flow;
 Incompressible Flow;
 Separated Flow;
 Turbulent Flow;
 Coordinate Transformations;
 Elliptic Differential Equations;
 Finite Difference Theory;
 Fortran;
 Gas Turbines;
 Kinetic Energy;
 NavierStokes Equation;
 Turbulence Models;
 Fluid Mechanics and Heat Transfer