Finite difference methods for reducing numerical diffusion in TEACH-type calculationsA methodological evaluation for two-finite differencing schemes for computer-aided gas turbine design is presented. The two computational schemes include; a Bounded Skewed Finite Differencing Scheme (BSUDS); and a Quadratic Upwind Differencing Scheme (QSDS). In the evaluation, the derivations of the schemes were incorporated into two-dimensional and three-dimensional versions of the Teaching Axisymmetric Characteristics Heuristically (TEACH) computer code. Assessments were made according to performance criteria for the solution of problems of turbulent, laminar, and coannular turbulent flow. The specific performance criteria used in the evaluation were simplicity, accuracy, and computational economy. It is found that the BSUDS scheme performed better with respect to the criteria than the QUDS. Some of the reasons for the more successful performance BSUDS are discussed.
Document ID
19850037337
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Syed, S. A. (United Technologies Corp. Engineering Div., East Hartford, CT, United States)
Chiappetta, L. M. (United Technologies Research Center East Hartford, CT, United States)