Assessment of a 3D boundary layer code to predict heat transfer and flow losses in a turbine
Abstract
Zonal concepts are utilized to delineate regions of application of threedimensional boundary layer (DBL) theory. The zonal approach requires three distinct analyses. A modified version of the 3DBL code named TABLET is used to analyze the boundary layer flow. This modified code solves the finite difference form of the compressible 3DBL equations in a nonorthogonal surface coordinate system which includes coriolis forces produced by coordinate rotation. These equations are solved using an efficient, implicit, fully coupled finite difference procedure. The nonorthogonal surface coordinate system is calculated using a general analysis based on the transfinite mapping of Gordon which is valid for any arbitrary surface. Experimental data is used to determine the boundary layer edge conditions. The boundary layer edge conditions are determined by integrating the boundary layer edge equations, which are the Euler equations at the edge of the boundary layer, using the known experimental wall pressure distribution. Starting solutions along the inflow boundaries are estimated by solving the appropriate limiting form of the 3DBL equations.
 Publication:

Turbine Engine Hot Section Technology
 Pub Date:
 October 1984
 Bibcode:
 1984tehs.nasaR....A
 Keywords:

 Flow Distribution;
 Gas Turbines;
 Heat Transfer;
 Prediction Analysis Techniques;
 Three Dimensional Boundary Layer;
 Algorithms;
 Boundary Value Problems;
 Coding;
 Finite Difference Theory;
 Separated Flow;
 Turbulent Flow;
 Vortices;
 Fluid Mechanics and Heat Transfer