An Integral Prediction Method for Three-Dimensional Flow Separation.
Rept. for Oct 82-Dec 83,
DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD AVIATION AND SURFACE EFFECTS DEPT
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A three-dimensional integral boundary-layer approach is developed and coupled with the streamline method for theoretically determining the vortex-type flow separation. The governing equations are solved in a streamwise system using a power-law profile for the streamwise flow and the Mager profile for the crossflow. The reduced ordinary system is then coupled with the streamline equation and integrated using the fourth-order Runge-Kutta scheme. Crossflow derivatives are evaluated and accounted for during the integration. A prolate spheroid at incidence in an incompressible turbulent flow is considered as a test case. Good comparison between the theory and the experiment has been observed for the case of alpha 10 degrees. For the case of high incidence, the method predicts a qualitative trend but deviates quantitatively due to the large crossflow involved. Author
- Numerical Mathematics
- Fluid Mechanics