Brieschenk, StefanO'Byrne, SeanKleine, Harald2025-06-112025-06-110010-2180ORCID:/0009-0007-2076-6766/work/162948416http://www.scopus.com/inward/record.url?scp=84869082466&partnerID=8YFLogxKhttps://hdl.handle.net/1885/733758528An experimental investigation of the behavior of laser-induced plasma (LIP) ignition for scramjet inlet injection is presented. The presented results demonstrate for the first time, that LIP can be used to promote the formation of hydroxyl in a hypersonic flow. The temporal evolution of the LIP-ignited region is monitored using the planar laser-induced fluorescence technique on the hydroxyl radical. This study is the first laser spark study in a hypersonic flow, shown to generate combustion products where they would not otherwise occur.4enHypersonic flowLaser-induced ignitionLaser-induced plasmaPlanar laser-induced fluorescence imagingPlasma-assisted combustionSupersonic combustion201310.1016/j.combustflame.2012.08.01184869082466