Abstract

The infrared imaging windows of the hyper/supersonic optical dome are encountering severe aero-optical effects (AOEs), so a flow control device, the ramp vortex generator array (RVGA) is proposed based on the ramp vortex generator to inhibit the supersonic mixing layers’ AOE, which is done by the nanotracer-based planar laser scattering technique and ray-tracing method. The experiments prove that under different pressure conditions, RVGA can reduce the mean and standard deviation of the root mean square of the optical path difference (OPD_rms) and reduce the supersonic mixing layers’ thickness and mixture a great deal. The AOE of the pressure-matched mixing layer is the weakest. Higher RVGA results in better optical performance. RVGA has the potential to be applied to supersonic film cooling to reduce aero-optical aberrations.

© 2023 Chinese Laser Press

Influence of RVGA’s height on suppressing the aero-optical effects induced by a supersonic mixing layer

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Experimental study on the aero-optical effects of a supersonic mixing layer controlled by the ramp vortex generator array

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Influence of jet components on the aero-optical effects of a 3D supersonic mixing layer

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Development of a temporal evolution model for aero-optical effects caused by vortices in the supersonic mixing layer

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Research on aero-optical prediction of supersonic turbulent boundary layer based on aero-optical linking equation

Haolin Ding, Shihe Yi, Xinhai Zhao, Junru Yi, and Lin He
Opt. Express 26(24) 31317-31332 (2018)