Investigation of the structure of separated zone before a blunted body initiated by localized energy supply in the flow

Abstract

The phenomena of drag force decreasing under localized energy supply before blunt body is investigated. The aim of this work is to identify relationships between changes in body resistance and the measured local parameter, with the nature of non-stationary processes in the front tear-off zone. The numerical simulation of the interaction of heating zone with shock-wave structure before face plane cylinder is carried out. The well known solver Ansys Fluent is used for computations. On the base of obtained numerical data’s the evolution of arising before obstacle separated zone is researched, the numerical results are compared with the flow picture, obtained in the experiment. Share traits with analogous phenomena taking place on the body having needle are discovered, that lets to look at process in a new fashion. A mechanism of gas flowing into the separated zone and agreed upon it increasing of this zone is improved. The interference of processes in the separated zone and flow around it is considered. Refs 12. Figs 5.

Keywords:

flow, obstacle, shock wave, rear wave, heating, separated zone