Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

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

Not Accessible

Your library or personal account may give you access

Abstract

Aero-optical effects in the mixing layer have caused significant concern due to the negative influence of high-speed vehicles with infrared imaging guidance systems. Here, we study the influence of different cooling mediums on the aero-optical effects. Four different cooling components are considered: helium (He), nitrogen (${\rm{N}}_2$), air, and argon (Ar). The large eddy simulation method and ray-tracing method are used, respectively, to simulate the 3D mixing layer and to calculate the optical path difference (OPD). The numerical results show that, as the molecular weight of the cooling mediums increases, the mixing layer transition advances and the 3D effect of the flow field is enhanced. The local minimum OPD values of the wavefront distortion are significantly correlated with the large-scale vortex structure of the mixing layer. The compression effect plays a dominant role in aero-optics before the large-scale structure forms. Once the large-scale vortex structure generates, the aero-optical effect is conducted by the density and compression effect. The cooling medium helium delays the development of the mixing layer and subsequently reduces the aero-optical effects. However, once the large-scale vortex structure forms, the aero-optical effect becomes serious due to the largest density difference between air and He.

© 2021 Optical Society of America

Full Article  |  PDF Article
More Like This
Influence of RVGA’s height on suppressing the aero-optical effects induced by a supersonic mixing layer

Zihao Xia, Haolin Ding, Xiwang Xu, and Shihe Yi
Appl. Opt. 61(35) 10615-10622 (2022)

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

Zihao Xia, Haolin Ding, Xiwang Xu, and Shihe Yi
Appl. Opt. 61(24) 7041-7049 (2022)

Numerical investigation on image degradation caused by aero-optical effects of the supersonic mixing layer

Guangming Guo, Xiaojian Tong, and Qin Luo
Appl. Opt. 59(35) 11059-11069 (2020)

Data Availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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 Optica member, or as an authorized user of your institution.

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

Figures (15)

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

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

Tables (4)

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

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

Equations (7)

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

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

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved