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Fast-framing ballistic imaging of velocity in an aerated spray

Sedarsky, David LU ; Gord, James; Carter, Campbell; Meyer, Terrence and Linne, Mark LU (2009) In Optics Letters 34(18). p.2748-2750
Abstract
We describe further development of ballistic imaging adapted for the liquid core of an atomizing spray. To fully understand spray breakup dynamics, one must measure the velocity and acceleration vectors that describe the forces active in primary breakup. This information is inaccessible to most optical diagnostics, as the signal is occluded by strong scattering in the medium. Ballistic imaging mitigates this scattering noise, resolving clean shadowgram-type images of structures within the dense spray region. We demonstrate that velocity data can be extracted from ballistic images of a spray relevant to fuel-injection applications, by implementing a simple, targeted correlation method for determining velocity from pairs of spray images.... (More)
We describe further development of ballistic imaging adapted for the liquid core of an atomizing spray. To fully understand spray breakup dynamics, one must measure the velocity and acceleration vectors that describe the forces active in primary breakup. This information is inaccessible to most optical diagnostics, as the signal is occluded by strong scattering in the medium. Ballistic imaging mitigates this scattering noise, resolving clean shadowgram-type images of structures within the dense spray region. We demonstrate that velocity data can be extracted from ballistic images of a spray relevant to fuel-injection applications, by implementing a simple, targeted correlation method for determining velocity from pairs of spray images. This work presents the first ballistic images of a liquid-fuel injector for scramjet combustion, and the first velocity information from ballistic images relevant to breakup in the near-field of a spray. (C) 2009 Optical Society of America (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Optics Letters
volume
34
issue
18
pages
2748 - 2750
publisher
Optical Society of America
external identifiers
  • wos:000270114800017
  • scopus:70349204350
ISSN
0146-9592
language
English
LU publication?
yes
id
e5a1ec65-44a5-4bc5-a9fb-6b5566362ca0 (old id 1489963)
date added to LUP
2009-10-21 09:39:55
date last changed
2017-02-26 03:45:00
@article{e5a1ec65-44a5-4bc5-a9fb-6b5566362ca0,
  abstract     = {We describe further development of ballistic imaging adapted for the liquid core of an atomizing spray. To fully understand spray breakup dynamics, one must measure the velocity and acceleration vectors that describe the forces active in primary breakup. This information is inaccessible to most optical diagnostics, as the signal is occluded by strong scattering in the medium. Ballistic imaging mitigates this scattering noise, resolving clean shadowgram-type images of structures within the dense spray region. We demonstrate that velocity data can be extracted from ballistic images of a spray relevant to fuel-injection applications, by implementing a simple, targeted correlation method for determining velocity from pairs of spray images. This work presents the first ballistic images of a liquid-fuel injector for scramjet combustion, and the first velocity information from ballistic images relevant to breakup in the near-field of a spray. (C) 2009 Optical Society of America},
  author       = {Sedarsky, David and Gord, James and Carter, Campbell and Meyer, Terrence and Linne, Mark},
  issn         = {0146-9592},
  language     = {eng},
  number       = {18},
  pages        = {2748--2750},
  publisher    = {Optical Society of America},
  series       = {Optics Letters},
  title        = {Fast-framing ballistic imaging of velocity in an aerated spray},
  volume       = {34},
  year         = {2009},
}