Experimental measurement of turbulence statistics and transverse integral scale of Mach 4 nozzle flow of the ONR-UTA arc jet wind tunnel

This study reports the first converged, non-intrusive measurement of a transverse integral scale of turbulence in an arc-jet flow, specifically a Mach 4 nitrogen freestream flow within the ONR–UTA (Office of Naval Research-University of Texas at Arlington) arc-heated plasma wind tunnel, Leste, using Femtosecond Laser Electronic Excitation Tagging (FLEET) velocimetry. A total of 4722 FLEET images capturing tagged fluid parcels were collected. To isolate the FLEET signal from the intense arc-jet