Calculation of two and threedimensional transonic cascade flow field using the NavierStokes equations
Abstract
A NavierStokes analysis employing the timedependent Linearized Block Implicit scheme (LBI) was applied to twodimensional and threedimensional transonic turbulent cascade flows. In general, the geometrical configuration of the turbine blade impacts both the grid construction procedure and the implementation of the numerical algorithm. Since modern turbine blades of interest are characterized by very blunt leading edges, rounded trailing edges and high stacking angles, a robust grid construction procedure is required that can accommodate the severe body shape while resolving regions of large flow gradients. A constructive Otype grid generation technique, suitable for cascades with rounded trailing edges, was developed and used to construct the C3X turbine cascade coordinate grid. Twodimensional calculations were performed employing the NavierStokes procedure for the C3X turbine cascade, and the predicted pressure coefficients and heat transfer rates were compared with the experimental data. Threedimensional NavierStokes calculations were also performed.
 Publication:

Turbine Engine Hot Section Technology
 Pub Date:
 October 1984
 Bibcode:
 1984tehs.nasa.....W
 Keywords:

 Computational Fluid Dynamics;
 Computational Grids;
 Flow Distribution;
 NavierStokes Equation;
 Prediction Analysis Techniques;
 Transonic Flow;
 Turbines;
 Boundary Value Problems;
 Grid Generation (Mathematics);
 Heat Transfer;
 Loads (Forces);
 Pressure Distribution;
 Time Dependence;
 Turbine Blades;
 Fluid Mechanics and Heat Transfer