INFLUENCE OF PRESSURE ON THE UNSTEADY WALL HEAT FLUX DURING A SELF-SUSTAINED DETONATION: AN EXPERIMENTAL INVESTIGATION

Abstract

This study experimentally investigates the unsteady wall heat transfer during the propagation of a steady detonation in a cylindrical tube. More particularly, this work focuses on the time evolution of the heat flux relatively to the detonation cell. A stoichiometric methane/hydrogen–oxygen mixture diluted with argon is used in order to obtain large and stable detonation cells. Type-E thermocouples, embedded into the wall, flushed mounted and aligned along a detonation tube, measured successively the wall temperature lift, during a detonation propagation.