About the Dynamic Damping Coefficients of a Segmental-Cone Model at Mach M = 2.3.

Abstract

In order to describe the nonlinear behavior of oscillation amplitude of the segmental-conical model on a transversive rod setup in a wind tunnel at Mach М = 2, a polynomial function of damping derivatives was used. Polynom of the 4th degree as a function of viscous damping allowed to describe two limit cycles observed in experiments. Coefficients of the polynom were determined and showed sufficient agreement with a direct numerical solution of the proposed dynamic equation.