Assessment of a 3D boundary layer code to predict heat transfer and flow losses in a turbine
Abstract
The prediction of the complete flow field in a turbine passage is an extremely difficult task due to the complex three dimensional pattern which contains separation and attachment lines, a saddle point and horseshoe vortex. Whereas, in principle such a problem can be solved using full NavierStokes equations, in reality methods based on a NavierStokes solution procedure encounter difficulty in accurately predicting surface quantities (e.g., heat transfer) due to grid limitations imposed by the speed and size of the existing computers. On the other hand the overall problem is strongly three dimensional and too complex to be analyzed by the current design methods based on inviscid and/or viscous strip theories. Thus there is a strong need for enhancing the current prediction techniques through inclusion of 3D viscous effects. A potentially simple and cost effective way to achieve this is to use a prediction method based on three dimensional boundary layer (3DBL) theory. The major objective of this program is to assess the applicability of such a 3DBL approach for the prediction of heat loads, boundary layer growth, pressure losses and streamline skewing in critical areas of a turbine passage. A brief discussion of the physical problem addressed here along with the overall approach is presented.
 Publication:

Turbine Eng. Hot Sect. Technol. (HOST)
 Pub Date:
 October 1983
 Bibcode:
 1983tehs.nasa..101V
 Keywords:

 Flow Distribution;
 Heat Transfer;
 Three Dimensional Boundary Layer;
 Turbine Blades;
 Turbine Engines;
 Computer Programs;
 Cross Flow;
 Predictions;
 Fluid Mechanics and Heat Transfer