Full Navier-Stokes Computations of Supersonic Flows over a Body at High Angles of Attack and Investigation of Crossflow Separation

Author

Department of Mechanical Engineering,Ferdowsi University of Mashhad

Abstract

In this paper, a three-dimensional code is developed to solve turbulent supersonic flows over a blunt-nose-cylinder at 32\degree\ and 44\degree\ angles of attack. The method used is an explicit finite-volume Runge-Kutta time stepping model for unsteady, three-dimensional, full, Navier-Stokes equations. This model can handle arbitrary geometries by using general coordinate transformations. The flowfields under consideration contain extensive regions of crossflow separation. The Reynolds shear stress terms are modeled algebraically with modifications to correct the turbulent length and velocity scales in separated regions. Calculations performed using the developed code require a computational memory accessible on most personal computers. Numerical results are in good agreement with experimental measurements. Comparisons of turbulent flow with graphical visualization by means of helicity revealed that the Runge-Kutta time stepping algorithm conserves symmetry at high angles of attack.

Volume 11, Issue 4 - Serial Number 4
Transactions on Civil Engineering (A)
October 2004
  • Receive Date: 25 July 2006
  • Revise Date: 08 December 2024
  • Accept Date: 30 December 2004