Numerical investigation of three-dimensional flow separation using the boundary layer equationsThe steady, incompressible, three-dimensional laminar and turbulent boundary-layer equations are solved in a streamline coordinate system and in a self-adaptive grid system using Matsuno's finite difference method. Techniques are described for calculating laminar and turbulent separation using the boundary-layer equations. Any type (bubble type or free vortex-layer type) of major separation line can be calculated at an angle of attack on ellipsoids of revolution by this boundary layer code. Results are presented for ellipsoids of revolution at angles of attack up to 45 degrees. Agreements with other numerical and experimental results are very good for laminar flows. Turbulent flows are also investigated with algebraic turbulence models proposed by Rotta and Cebeci and Smith. Good agreement with experimental results was obtained at a small angle of attack (10 degrees) but only qualitative agreement was obtained at a high angle of attack (30 degrees) for turbulent flow on a 6:1 ellipsoid of revolution.
Document ID
19880035238
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Wie, Yong-Sun (NASA Langley Research Center Hampton, VA; North Carolina State University, Raleigh, United States)
Dejarnette, Fred R. (North Carolina State University Raleigh, United States)