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

Diode-laser-based near-resonantly enhanced flow visualization in shock tunnels

Not Accessible

Your library or personal account may give you access

Abstract

Two new near-resonantly enhanced flow visualization techniques suitable for hypersonic low-density flows in shock or arc tunnels have been developed using seeded lithium (Li) metal as the refractivity-enhancing species. Two semiconductor lasers, single-longitudinal-mode and multimode, are compared with respect to their suitability as light sources for the technique. Transient wake-flow structures around a cylinder and a model of a planetary entry vehicle are visualized to demonstrate the capabilities of this comparatively inexpensive and simple visualization system. The images show flow features which are undetectable with conventional schlieren, shadowgraph, or interferometry techniques. Furthermore, the effect of density inhomogeneities along the line-of-sight outside the region of interest can be reduced by enhancing the refractivity only in selected parts of the flowfield.

© 2008 Optical Society of America

Full Article  |  PDF Article
More Like This
Enhanced flow visualization with near-resonant holographic interferometry

Timothy J. McIntyre, Alexis I. Bishop, Troy N. Eichmann, and Halina Rubinsztein-Dunlop
Appl. Opt. 42(22) 4445-4451 (2003)

Dual-hologram shearing interferometry with regulated sensitivity

Gregory R. Toker and Daniel Levin
Appl. Opt. 37(22) 5162-5168 (1998)

Retroreflective shadowgraph technique for large-scale flow visualization

Michael J. Hargather and Gary S. Settles
Appl. Opt. 48(22) 4449-4457 (2009)

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 (9)

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 (1)

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 (6)

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