Experimental Investigation of Single Expansion Ramp Nozzle (SERN) Flows with 20° Ramp Angle and 1h CowlPrasanth Samykkannu, Sam Daniel Fenny A, Yokesvaran K and Anand CEPJ Web Conf., 355 (2026) 04004DOI: https://doi.org/10.1051/epjconf/202635504004