Ramp separation response to laser-induced breakdown disturbed boundary layer at mach 4.5

Seong kyun Im, Lydia Wermer, Damiano Baccarella, Qili Liu, Brendan McGann, Hyungrok Do

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)


The responses of a ramp separation to a boundary layer disturbed by a laser-induced breakdown in Mach 4.5 flow were investigated experimentally. Flat plate-ramp models with three different ramp angles (20 degree, 25 degree, and 30 degree) were tested. A high-speed schlieren imaging technique at 50 kHz frame rate was used to visualize the flow near the corner of the ramp. The laser-induced breakdown was introduced at the upstream of the model leading edge to generate pressure wave and a confined thermal spot that travel to the downstream of the flow. The laminar boundary layer on the flat plate surface was disturbed strongly by the entropy spot. The suppression of the separated flow at a corner of the ramp model was observed in all of the three different ramp angle models when the disturbed boundary layer passed through the ramp corner.

Original languageEnglish
Title of host publication54th AIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624103933
Publication statusPublished - 2016
Externally publishedYes
Event54th AIAA Aerospace Sciences Meeting, 2016 - San Diego, United States
Duration: 2016 Jan 42016 Jan 8

Publication series

Name54th AIAA Aerospace Sciences Meeting


Conference54th AIAA Aerospace Sciences Meeting, 2016
Country/TerritoryUnited States
CitySan Diego

ASJC Scopus subject areas

  • Aerospace Engineering


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