Calculation of Viscous Drag and Turbulent Boundary-Layer Separation on Two-Dimensional and Axisymetric Bodies in Incompressible Flows

摘要

The report studies the accuracy of calculating the total drag of two-dimensional and axisymmetric bodies and the accuracy of calculating the location of turbulent boundary-layer separation in flows past such bodies. The drag calculations were made by using the Douglas boundary-layer method. This is an implicit finite-difference method applicable to both laminar and turbulent boundary layers. The method also accounts for the transverse curvature effects. In general, comparison of calculated and experimental drag coefficients for both two-dimensional and axisymmetric bodies are in good agreement with experiment. The separation calculations were made by considering four different separation-prediction methods. They are the Douglas boundary-layer method, Head's method, Stratford's method and Goldschmied's method. (Author)