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Shock wave boundary layer interaction studied by high-speed schlieren

Sun, Z. ORCID: 0000-0002-3862-7939, Gan, T. and Wu, Y. (2018). Shock wave boundary layer interaction studied by high-speed schlieren. Paper presented at the 19th International Symposium on Applications of Laser and Imaging Techniques to Fluid Mechanics, 16-19 Jul 2018, Lisbon, Portugal.

Abstract

Shock wave boundary layer interactions at compression ramps have been examined by high-speed schlieren. A total of six ramps with angles ranging from 20 deg to 30 deg, the ramp angle effect on the SWBLI is thus studied. The present high-speed schlieren with a frame rate of 20 kHz generates a large ensemble of 9000 images, which secures the convergence of the statistics of the schlieren intensity. The rms of the schlieren intensity is of great interest, as it enables visualisation of the flow features that are not observable in the raw schlieren images, such as the corner separation/low momentum region, the spot of strong flow unsteadiness right after the shock wave and the location of the peak fluctuation over the ramp. Through the present systematic experimental investigation of SWBLI, the highspeed schlieren is demonstrated to be of great capability for SWBLI study.

Publication Type: Conference or Workshop Item (Paper)
Additional Information: ┬ęthe authors, 2018.
Subjects: T Technology > TL Motor vehicles. Aeronautics. Astronautics
Departments: School of Mathematics, Computer Science & Engineering > Engineering > Mechanical Engineering & Aeronautics
URI: http://openaccess.city.ac.uk/id/eprint/21651
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