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Title: Single-camera, single-shot, time-resolved laser-induced incandescence decay imaging

Abstract

We report that knowledge of soot particle sizes is important for understanding soot formation and heat transfer in combustion environments. Soot primary particle sizes can be estimated by measuring the decay of time-resolved laser-induced incandescence (TiRe-LII) signals. Existing methods for making planar TiRe-LII measurements require either multiple cameras or time-gate sweeping with multiple laser pulses, making these techniques difficult to apply in turbulent or unsteady combustion environments. Here, we report a technique for planar soot particle sizing using a single high-sensitivity, ultra-high-speed 10 MHz camera with a 50 ns gate and no intensifier. With this method, we demonstrate measurements of background flame luminosity, prompt LII, and TiRe-LII decay signals for particle sizing in a single laser shot. The particle sizing technique is first validated in a laminar non-premixed ethylene flame. Lastly, the method is applied to measurements in a turbulent ethylene jet flame.

Authors:
ORCiD logo [1];  [2];  [1];  [1];  [1];  [2];  [2];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Sandia National Laboratories, Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1483972
Report Number(s):
SAND-2018-12289J
Journal ID: ISSN 0146-9592; OPLEDP; 669120
Grant/Contract Number:  
AC04-94AL85000; NA0003525
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Optics Letters
Additional Journal Information:
Journal Volume: 43; Journal Issue: 21; Journal ID: ISSN 0146-9592
Publisher:
Optical Society of America (OSA)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Chen, Yi, Cenker, Emre, Richardson, Daniel R., Kearney, Sean P., Halls, Benjamin Robert, Skeen, Scott A., Shaddix, Christopher R., and Guildenbecher, Daniel Robert. Single-camera, single-shot, time-resolved laser-induced incandescence decay imaging. United States: N. p., 2018. Web. doi:10.1364/OL.43.005363.
Chen, Yi, Cenker, Emre, Richardson, Daniel R., Kearney, Sean P., Halls, Benjamin Robert, Skeen, Scott A., Shaddix, Christopher R., & Guildenbecher, Daniel Robert. Single-camera, single-shot, time-resolved laser-induced incandescence decay imaging. United States. doi:10.1364/OL.43.005363.
Chen, Yi, Cenker, Emre, Richardson, Daniel R., Kearney, Sean P., Halls, Benjamin Robert, Skeen, Scott A., Shaddix, Christopher R., and Guildenbecher, Daniel Robert. Mon . "Single-camera, single-shot, time-resolved laser-induced incandescence decay imaging". United States. doi:10.1364/OL.43.005363.
@article{osti_1483972,
title = {Single-camera, single-shot, time-resolved laser-induced incandescence decay imaging},
author = {Chen, Yi and Cenker, Emre and Richardson, Daniel R. and Kearney, Sean P. and Halls, Benjamin Robert and Skeen, Scott A. and Shaddix, Christopher R. and Guildenbecher, Daniel Robert},
abstractNote = {We report that knowledge of soot particle sizes is important for understanding soot formation and heat transfer in combustion environments. Soot primary particle sizes can be estimated by measuring the decay of time-resolved laser-induced incandescence (TiRe-LII) signals. Existing methods for making planar TiRe-LII measurements require either multiple cameras or time-gate sweeping with multiple laser pulses, making these techniques difficult to apply in turbulent or unsteady combustion environments. Here, we report a technique for planar soot particle sizing using a single high-sensitivity, ultra-high-speed 10 MHz camera with a 50 ns gate and no intensifier. With this method, we demonstrate measurements of background flame luminosity, prompt LII, and TiRe-LII decay signals for particle sizing in a single laser shot. The particle sizing technique is first validated in a laminar non-premixed ethylene flame. Lastly, the method is applied to measurements in a turbulent ethylene jet flame.},
doi = {10.1364/OL.43.005363},
journal = {Optics Letters},
issn = {0146-9592},
number = 21,
volume = 43,
place = {United States},
year = {2018},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on October 29, 2019
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