Report 1992-15

Is the transonic flow around a cylinder

N. Botta

Abstract: The inviscid transonic flow about a circular cylinder is investigated at large times. For this scope the Euler equations are integrated numerically, according to a time dependent technique. The integration is based on an high resolution finite volume upwind method. Transitions to qualitatively different families of solutions have been observed by increasing the value of the free stream Mach number from 0.5 up to 1. In particular the breakdown of the periodic solution into an irregularly oscillating flow was noticed. Goal of this work is the description of these transitions and their interpretation on the basis of the physics of inviscid flow.

Keywords: unsteady transonic flow, circular cylinder, Eulerequations

Paper: Available as PDF (181 MB) or as hardcopy to order reports@sam.math.ethz.ch.