Abstract

The aero-optical environment around a hemisphere-on-cylinder turret with both flat and conformal windows was studied experimentally in flight using the Airborne Aero-Optical Laboratory-Transonic for a range of subsonic and transonic Mach numbers between 0.5 and 0.8. Above M=0.6, the local shock appeared near the top of the turret, causing additional aero-optical distortions at side-looking angles. Using time-resolved wavefronts, instantaneous shock locations were extracted and analyzed. The mean shock location was found to be near a viewing angle, α=80  deg for both window types at M=0.7 and 0.8. For M=0.8, the shock has a single frequency peak at StD=0.15, the same as for the unsteady separation line, indicating a lock-in mechanism between the shock and the separated wake region. Analysis of aero-optical distortions in the wake indicated that the wake dynamics were beginning to be affected by the shock only at high transonic speed of M=0.8 for the conformal-window turret.

© 2017 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Aero-optical effects of an optical seeker with a supersonic jet for hypersonic vehicles in near space

Guangming Guo, Hong Liu, and Bin Zhang
Appl. Opt. 55(17) 4741-4751 (2016)

Spatial–temporal-covariance-based modeling, analysis, and simulation of aero-optics wavefront aberrations

Curtis R. Vogel, Glenn A. Tyler, and Donald J. Wittich
J. Opt. Soc. Am. A 31(7) 1666-1679 (2014)

Experimental investigation on aero-optics of supersonic turbulent boundary layers

Haolin Ding, Shihe Yi, Yangzhu Zhu, and Lin He
Appl. Opt. 56(27) 7604-7610 (2017)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (17)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (5)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription