Instantaneous two-camera three-dimensional planar Doppler velocimetry using imaging fiber bundles

David S. Nobes; Helen D. Ford; Ralph P. Tatam

doi:10.1117/12.449385

26 November 2001 Instantaneous two-camera three-dimensional planar Doppler velocimetry using imaging fiber bundles

David S. Nobes, Helen D. Ford, Ralph P. Tatam

Proceedings Volume 4448, Optical Diagnostics for Fluids, Solids, and Combustion; (2001) https://doi.org/10.1117/12.449385
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

This paper describes a planar Doppler velocimetry (PDV) technique that is capable of measuring the three, instantaneous components of velocity in two dimensions using a single pair of signal and reference cameras. PDV can be used to measure the instantaneous 3-D velocity of a fluid by using an absorption line filter (ALF) to determine the Doppler shifted frequency of a narrow line pulsed laser (Nd:YAG) that has been scattered off particles seeded into the flow. In the technique presented here the three views required to obtain three dimensional velocity information are ported from the collection optics to a single imaging plane using flexible fiber imaging bundles. These are made up of a coherent array of single fibers and are combined at one end as the input plane to the measurement head. A fourth leg of the imaging bundle is used to image the individual laser pulses and allow correction for pulse-to-pulse frequency variations. The results reported in the paper are from the development phase of the system and are of the velocity field of a rotating wheel.

Citation Download Citation

David S. Nobes, Helen D. Ford, and Ralph P. Tatam "Instantaneous two-camera three-dimensional planar Doppler velocimetry using imaging fiber bundles", Proc. SPIE 4448, Optical Diagnostics for Fluids, Solids, and Combustion, (26 November 2001); https://doi.org/10.1117/12.449385

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