Accession Number:

ADA142551

Title:

An Integral Prediction Method for Three-Dimensional Flow Separation.

Descriptive Note:

Rept. for Oct 82-Dec 83,

Corporate Author:

DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD AVIATION AND SURFACE EFFECTS DEPT

Personal Author(s):

Report Date:

1984-05-01

Pagination or Media Count:

16.0

Abstract:

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

Subject Categories:

  • Numerical Mathematics
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE