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

doi:10.2514/6.2016-0616

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 proceeding › Conference contribution

3 Citations (Scopus)

Abstract

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 language	English
Title of host publication	54th AIAA Aerospace Sciences Meeting
Publisher	American Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)	9781624103933
DOIs	https://doi.org/10.2514/6.2016-0616
Publication status	Published - 2016
Externally published	Yes
Event	54th AIAA Aerospace Sciences Meeting, 2016 - San Diego, United States Duration: 2016 Jan 4 → 2016 Jan 8

Publication series

Name	54th AIAA Aerospace Sciences Meeting
Volume	0

Conference

Conference	54th AIAA Aerospace Sciences Meeting, 2016
Country/Territory	United States
City	San Diego
Period	16/1/4 → 16/1/8

Bibliographical note

Publisher Copyright:
© 2016, American Institute of Aeronautics and Astronautics Inc, AIAA. All Rights Reserved.

ASJC Scopus subject areas

Aerospace Engineering

Access to Document

10.2514/6.2016-0616

Cite this

Ramp separation response to laser-induced breakdown disturbed boundary layer at mach 4.5. / Im, Seong kyun; Wermer, Lydia; Baccarella, Damiano et al.
54th AIAA Aerospace Sciences Meeting. American Institute of Aeronautics and Astronautics Inc, AIAA, 2016. (54th AIAA Aerospace Sciences Meeting; Vol. 0).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Im, SK, Wermer, L, Baccarella, D, Liu, Q, McGann, B & Do, H 2016, Ramp separation response to laser-induced breakdown disturbed boundary layer at mach 4.5. in 54th AIAA Aerospace Sciences Meeting. 54th AIAA Aerospace Sciences Meeting, vol. 0, American Institute of Aeronautics and Astronautics Inc, AIAA, 54th AIAA Aerospace Sciences Meeting, 2016, San Diego, United States, 16/1/4. https://doi.org/10.2514/6.2016-0616

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title = "Ramp separation response to laser-induced breakdown disturbed boundary layer at mach 4.5",

abstract = "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.",

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AU - McGann, Brendan

AU - Do, Hyungrok

PY - 2016

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N2 - 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.

AB - 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.

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

Abstract

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ASJC Scopus subject areas

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