Two-photon fluorescence laser sheet imaging for high contrast visualization of atomizing sprays

Journal article


Publication Details

Author(s): Berrocal E, Conrad C, Puls J, Arnold CL, Wensing M, Linne M, Miranda M
Journal: OSA Continuum
Publication year: 2019
Volume: 2
Journal issue: 3
Pages range: 983-993
ISSN: 2578-7519


Abstract

Two-photon excitation laser induced fluorescence (2p-LIF) is used here for imaging an optically dense atomizing spray. The main advantage of the approach is that very little fluorescence interference originating from multiple light scattering is generated. This leads to high image contrast and a faithful description of the imaged fluid structures. While point measurement 2p-LIF imaging is a well-known approach used in life science microscopy, it has, to the best of the authors' knowledge, never been tested for analyzing liquid structures in spray systems. We take advantage of this process, here, at a macroscopic scale (similar to 5 x 5 mm field of view) by imaging the central part of a light sheet of 10 mm height. To generate enough 2p-LIF signal at such a scale and with single-shot detection, ultra-short laser pulses of 25 fs, centered at 800 nm wavelength and having 2.5 mJ pulse energy, have been used. The technique is demonstrated by imaging a single spray plume from a 6 hole commercial Gasoline Direct Injection (GDI) system running at 200 bar injection pressure. The proposed approach is very promising for detailed analysis of liquid breakups in optically dense sprays and can be used for other fluid mechanics related applications. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement


FAU Authors / FAU Editors

Conrad, Chris
Lehrstuhl für Technische Thermodynamik
Wensing, Michael Prof. Dr.-Ing.
Professur für Technische Thermodynamik


External institutions
Lund University / Lunds universitet
University of Edinburgh


How to cite

APA:
Berrocal, E., Conrad, C., Puls, J., Arnold, C.L., Wensing, M., Linne, M., & Miranda, M. (2019). Two-photon fluorescence laser sheet imaging for high contrast visualization of atomizing sprays. OSA Continuum, 2(3), 983-993. https://dx.doi.org/10.1364/OSAC.2.000983

MLA:
Berrocal, Edouard, et al. "Two-photon fluorescence laser sheet imaging for high contrast visualization of atomizing sprays." OSA Continuum 2.3 (2019): 983-993.

BibTeX: 

Last updated on 2019-29-03 at 13:23