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2D-Mapping of the Droplets Sauter Mean Diameter in a Hollow-cone Spray Using SLIPI-LIF/MIE

Mishra, Yogeshwar LU ; Berrocal, Edouard LU ; Kristensson, Elias LU and Aldén, Marcus LU (2013) 6th European combustion meeting, 2013 p.1-5
Abstract
In this work, we report an original experimental approach for mapping the droplets Sauter Mean Diameter (SMD) of a hollow-cone water spray using the SLIPI-LIF/MIE technique. Water mixed with a non-toxic fluorescing dye is continuously injected at 20 bars injection pressure and the formed hollow-cone spray is illuminated using a continuous wave laser. The illumination wavelength is carefully chosen (here, 447 nm) to excite the injected dye/water mixture, which generates a significant Laser Induced Fluorescence (LIF) signal peaking at 514 nm. The LIF and Mie signals are recorded using a CCD camera and their intensity ratio is used to extract a two-dimensional distribution of the droplets SMD. In this article, we show that even for the case... (More)
In this work, we report an original experimental approach for mapping the droplets Sauter Mean Diameter (SMD) of a hollow-cone water spray using the SLIPI-LIF/MIE technique. Water mixed with a non-toxic fluorescing dye is continuously injected at 20 bars injection pressure and the formed hollow-cone spray is illuminated using a continuous wave laser. The illumination wavelength is carefully chosen (here, 447 nm) to excite the injected dye/water mixture, which generates a significant Laser Induced Fluorescence (LIF) signal peaking at 514 nm. The LIF and Mie signals are recorded using a CCD camera and their intensity ratio is used to extract a two-dimensional distribution of the droplets SMD. In this article, we show that even for the case of a dilute hollow-cone spray, where single scattering events are in majority (OD~1), the LIF/Mie measurement of droplets SMD still remains strongly affected by multiple light scattering. We demonstrate, then, that the use of SLIPI is of fundamental importance to obtain trustable SMD measurements based on the LIF/Mie ratio, even for optically dilute sprays. (Less)
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author
organization
publishing date
type
Contribution to conference
publication status
unpublished
subject
keywords
Sauter Mean Diameter, multiple scattering, SLIPI, Sprays
pages
5 pages
conference name
6th European combustion meeting, 2013
language
English
LU publication?
yes
id
cd2e5a6d-fd61-4628-9ff1-6ae652ebf07a (old id 5471221)
date added to LUP
2015-06-10 21:44:53
date last changed
2016-07-07 14:38:35
@misc{cd2e5a6d-fd61-4628-9ff1-6ae652ebf07a,
  abstract     = {In this work, we report an original experimental approach for mapping the droplets Sauter Mean Diameter (SMD) of a hollow-cone water spray using the SLIPI-LIF/MIE technique. Water mixed with a non-toxic fluorescing dye is continuously injected at 20 bars injection pressure and the formed hollow-cone spray is illuminated using a continuous wave laser. The illumination wavelength is carefully chosen (here, 447 nm) to excite the injected dye/water mixture, which generates a significant Laser Induced Fluorescence (LIF) signal peaking at 514 nm. The LIF and Mie signals are recorded using a CCD camera and their intensity ratio is used to extract a two-dimensional distribution of the droplets SMD. In this article, we show that even for the case of a dilute hollow-cone spray, where single scattering events are in majority (OD~1), the LIF/Mie measurement of droplets SMD still remains strongly affected by multiple light scattering. We demonstrate, then, that the use of SLIPI is of fundamental importance to obtain trustable SMD measurements based on the LIF/Mie ratio, even for optically dilute sprays.},
  author       = {Mishra, Yogeshwar and Berrocal, Edouard and Kristensson, Elias and Aldén, Marcus},
  keyword      = {Sauter Mean Diameter,multiple scattering,SLIPI,Sprays},
  language     = {eng},
  pages        = {1--5},
  title        = {2D-Mapping of the Droplets Sauter Mean Diameter in a Hollow-cone Spray Using SLIPI-LIF/MIE},
  year         = {2013},
}