Registration of Nonstationary Heat Flux Dynamics in Shock Tunnels Using High-Speed Thermography
The present work demonstrates the possibility of contactless registration of changes in the thermal radiation of the metal outer surfaces of shock tunnels during the formation and passage of high velocity gas-dynamic flows with planar shock waves inside the channels. The representative curves of the temperature response of the channel outer wall to thermal processes inside the shock tunnels have been studied. The dependence of the parameters of these curves on the shock wave Mach number (in the range of 2.0-4.5), the position of the detection zone (10-90 calibers from the diaphragm), and the thickness of the copper walls of the channel (1.5-2.0 mm) were also studied