Speckle Photography Of Density Gradients In Gas Flows

G. N. Blinkov; N. A. Fomin; J. Konefal; O. G. Penyazkov; G. Sliwinski

doi:10.1117/12.961323

3 April 1989 Speckle Photography Of Density Gradients In Gas Flows

G. N. Blinkov, N. A. Fomin, J. Konefal, O. G. Penyazkov, G. Sliwinski

Proceedings Volume 1121, Interferometry '89; (1989) https://doi.org/10.1117/12.961323
Event: Interferometry '89, 1989, Warsaw, Poland

Abstract

Speckle methods are described to determine density gradient distributions in gas flows. The results are presented on speckle photography measurements of density gradient fields and temperatures in jets, flames, gas flows, both laminar and turbulent. Study deals with gas jets from conic nozzles used for laser treatment of materials in a gas medium, with different-configuration flames at natural-gas burning in a pumping volume as well as with gas flows directed into the submerged space in shock tubes and into the cavity part of mixing high-power lasers. The main optical schemes and experimental set-ups for obtaining specklegrams are used by the present authors and are given here. Specklegrams are recorded by double exposure when a diffuse scatterer is placed before and behind an investigated object. Use of the measured values of speckle shifts at laser scanning of a specklegram allows reconstructing local parameter distributions for different cross-sections of axisymmetric objects.

Citation Download Citation

G. N. Blinkov, N. A. Fomin, J. Konefal, O. G. Penyazkov, and G. Sliwinski "Speckle Photography Of Density Gradients In Gas Flows", Proc. SPIE 1121, Interferometry '89, (3 April 1989); https://doi.org/10.1117/12.961323

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
5 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Speckle

Photography

Refractive index

Computed tomography

Diagnostics

Temperature metrology

Combustion

Show All Keywords

Keywords/Phrases

Search In:

Publication Years