Experimental investigation of the flow dynamics and boundary layer in a shock tube with discharge section based on digital panoramic methods

The Discharge Heated Channel Region Visualization based on Thermal Imaging Registration

“…A special discharge section (Fig. 1) with transparent quartz glass side walls (optical windows) 16 mm thick was built into the single-diaphragm shock tube low-pressure channel with a 24 × 48 mm 2 [9] rectangular cross size. Through the discharge section side walls, highspeed recording methods (shadowgraph method, optical glow registration, thermal imaging) were used to study the effect on the high-speed flow from a distributed surface discharge sliding over the dielectric surface in the space between copper plasma electrodes mounted flush on the dielectric surfaces of the upper and lower walls [10].…”

“…The delay time between the flat shock wave passages windward obstacle wall moment and the pulsed surface discharge initiation moment varied within tp = 0.1 -0.4 ms. At this temporal interval, the flow velocity is quite high: 800-700 m/s [9]. The delay time choice makes it possible to initiate the discharge at different flow development stages.…”