Characterization of fluorescence tracers for thermometry and film thickness measurements in liquid coolants relevant for thermal management of electric and …

M Koegl, M Delwig, L Zigan - Sensors, 2022 - mdpi.com
This study investigated a novel two-color LIF (laser-induced fluorescence) technique for
thermometry in coolants relevant for electric components. In principle, this diagnostic …

Fluorescence spectroscopy for studying evaporating droplets using the dye eosin-Y

M Koegl, C Weiß, L Zigan - Sensors, 2020 - mdpi.com
Laser-induced fluorescence (LIF) spectroscopy using dyes is frequently applied for
characterization of liquids and two-phase flows. The technique is utilized eg, for mixing …

Polarization-dependent LIF/Mie ratio for sizing of micrometric ethanol droplets doped with Nile red

M Koegl, H Dai, K Baderschneider, H Ulrich, L Zigan - Applied Optics, 2022 - opg.optica.org
The present study deals with droplet sizing based on laser-induced fluorescence (LIF) and
Mie scattering for varied polarization of the utilized laser (parallel or perpendicular). The …

Application of SLIPI-based techniques for droplet size, concentration, and liquid volume fraction mapping in sprays

YN Mishra, T Tscharntke, E Kristensson, E Berrocal - Applied Sciences, 2020 - mdpi.com
Structured laser illumination planar imaging (SLIPI)-based techniques have been employed
during the past decade for addressing multiple light scattering issues in spray imaging. In …

An optical method to characterize streamer variability and streamer-to-flame transition for radio-frequency corona discharges

V Cruccolini, CN Grimaldi, G Discepoli, F Ricci… - Applied Sciences, 2020 - mdpi.com
Featured Application igniter end-of-line testing. Abstract In recent years, radio-frequency
corona ignition gained increasing interest from the engine research community because of …

Numerical study of engine performance and emissions for port injection of ammonia into a gasoline\ethanol dual-fuel spark ignition engine

F Salek, M Babaie, A Shakeri, SV Hosseini, T Bodisco… - Applied Sciences, 2021 - mdpi.com
This study aims to investigate the effect of the port injection of ammonia on performance,
knock and NOx emission across a range of engine speeds in a gasoline/ethanol dual-fuel …

Planar droplet sizing for studying the influence of ethanol admixture on the spray structure of gasoline sprays

M Koegl, YN Mishra, K Baderschneider, C Conrad… - Experiments in …, 2020 - Springer
A novel planar droplet sizing (PDS) technique based on laser-induced fluorescence (LIF)
and Mie-scattering is utilized for the characterization of the spray structure under gasoline …

Morphology-dependent resonances in laser-induced fluorescence images of micrometric gasoline/ethanol droplets utilizing the dye nile red

M Koegl, H Dai, MP Qomi, F Bauer, B Eppinger… - Applied Optics, 2021 - opg.optica.org
The present study deals with the solvent-dependent morphology-dependent resonances
(MDR) in the laser-induced fluorescence (LIF) signal of monodisperse gasoline droplets (30 …

Impact of polarization and detection angle on Mie scattering signals for planar droplet sizing

BW Klevansky, YN Mishra, BL Lehnert, M Wensing… - Experiments in …, 2025 - Springer
The planar droplet sizing (PDS) method for determining the droplet diameter from the ratio of
laser-induced fluorescence (LIF) and Mie scattering signal (Mie) has been extensively …

A novel approach for measurement of composition and temperature of N-decane/butanol blends using two-color laser-induced fluorescence of nile red

M Koegl, M Pahlevani, L Zigan - Sensors, 2020 - mdpi.com
In this work, the possibility of using a two-color LIF (laser-induced fluorescence) approach
for fuel composition and temperature measurements using nile red dissolved in n …