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Real-time analysis of flame chemiluminescence spectra for equivalence ratio and gas composition using neural network approaches Open
In response to the expected challenges in gas network operations, where variable gas compositions require robust combustion systems with automatic adaptation, this study explores the application of an artificial neural network (ANN) for re…
Demonstration of novel fiber-coupled phosphor thermometry in a laser powder bed fusion process Open
This work introduces a novel in situ approach to analyze the thermal history during the laser-based powder bed fusion of metals, utilizing phosphor thermometry. AlSi10Mg powder was mixed with the thermographic phosphor MFG:Mn, serving as a…
An efficient green synthesis of Ag/Fe2O3 nanocomposite using Carica papaya peel extract for enhanced photocatalytic, antioxidant, and antibacterial activities Open
Dye waste pollution poses a significant threat to human health and the environment. Photocatalysis can be used to degrade dyes in industrial wastes. This study aims to synthesize nanocrystals of Fe2O3 and Ag-doped Fe2O3 using Carica papaya…
View article: LIFSim, a modular laser-induced fluorescence code for concentration and temperature analysis of diatomic molecules
LIFSim, a modular laser-induced fluorescence code for concentration and temperature analysis of diatomic molecules Open
Laser-induced fluorescence (LIF) is a non-invasive optical diagnostics technique frequently used in reactive media to measure physical properties such as gas-phase species concentrations and temperature. It provides important information f…
Synthesis of Ag-NiO Nanocomposite Using Persea Americana Peel Extract and Evaluation of Its Antibacterial and Antioxidant Capacity Open
Canola meal as a by-product from the vegetable oil production provides a protein-rich material which is available in large quantities but with limited areas for application. The objective of this study was to investigate the possibility of…
View article: Iron oxide nanoparticle synthesis: Simulation-based comparison of laboratory- and pilot plant-scale spray-flame synthesis
Iron oxide nanoparticle synthesis: Simulation-based comparison of laboratory- and pilot plant-scale spray-flame synthesis Open
This study analyzes burner scale-dependent effects for iron-oxide nanoparticles synthesis in spray flames through a combined experimental and numerical approach. A laboratory- and a pilot plant-scale synthesis facility generate iron oxide …
Multi-line OH-LIF for gas-phase temperature and concentration imaging in the SpraySyn burner Open
Gas-phase temperature and OH concentration images are measured in the SpraySyn nanoparticle-synthesis standard burner using multi-line OH laser-induced fluorescence (LIF) thermometry. In this burner, a spray flame fed by a combustible nano…
Analyzing 3D fields of refractive index, emission and temperature in spray-flame nanoparticle synthesis via tomographic imaging using multi-simultaneous measurements (TIMes) Open
Turbulent spray flames issuing from the SpraySyn 2.0 burner were investigated in the present work by means of tomographic imaging using multi-simultaneous measurements (TIMes). This small-scale standard burner is designed to study flame-sp…
LIF-imaging of temperature and iron-atom concentration in iron nitrate doped low-pressure aerosol flat flames Open
To enable the investigation of the flame chemistry of precursor-laden nanoparticle forming spray flames in quasi-one-dimensional geometry, a matrix burner was developed in which a laminar flat flame is uniformly supplied with liquid aeroso…
View article: Simulations of laminar methane flames doped with iron nitrate/1-butanol aerosol in a novel matrix burner
Simulations of laminar methane flames doped with iron nitrate/1-butanol aerosol in a novel matrix burner Open
A novel matrix burner enabled the investigation of aerosol-doped laminar low-pressure flames. Iron nitrate dissolved in 1-butanol was used as a typical model system, also found in the flame spray pyrolysis for synthesis of iron oxide. The …
Fiber-coupled phosphor thermometry for wall temperature measurements in a full-scale hydrogen gas turbine combustor Open
Online wall temperatures were measured with fiber-coupled phosphor thermometry in a full-scale gas turbine combustor. The combustor was operated with natural gas and up to 100 vol% hydrogen at engine-relevant conditions. Two phosphors were…
View article: A hydrogen-based burner concept for pilot-scale spray-flame synthesis of nanoparticles: Investigation of flames and iron oxide product materials
A hydrogen-based burner concept for pilot-scale spray-flame synthesis of nanoparticles: Investigation of flames and iron oxide product materials Open
Nanoparticle synthesis in spray flames is a flexible method to produce materials with a wide range of compositions, morphologies, and properties. On the road to industrial application, the transfer from laboratory to pilot scale is an impo…
View article: Spatially resolved measurement of the distribution of solid and liquid Si nanoparticles in plasma synthesis through line-of-sight extinction spectroscopy
Spatially resolved measurement of the distribution of solid and liquid Si nanoparticles in plasma synthesis through line-of-sight extinction spectroscopy Open
In many high-temperature gas-phase nanoparticle synthesis processes, freshly nucleated particles are liquid and solidify during growth and cooling. This study presents an approach to determine the location of the liquid-to-solid phase tran…
View article: A Compact Fiber-Coupled NIR/MIR Laser Absorption Instrument for the Simultaneous Measurement of Gas-Phase Temperature and CO, CO2, and H2O Concentration
A Compact Fiber-Coupled NIR/MIR Laser Absorption Instrument for the Simultaneous Measurement of Gas-Phase Temperature and CO, CO2, and H2O Concentration Open
A fiber-coupled, compact, remotely operated laser absorption instrument is developed for CO, CO2, and H2O measurements in reactive flows at the elevated temperatures and pressures expected in gas turbine combustor test rigs with target pre…
In-cylinder thermographic PIV combined with phosphor thermometry using ZnO:Zn Open
Two-dimensional thermographic particle image velocimetry (T-PIV) is presented for the in situ measurement in optically accessible internal combustion (IC) engines. Temperature and velocity measurements are combined using thermographic phos…
Phase-sensitive detection of gas-borne Si nanoparticles via line-of-sight UV/VIS attenuation Open
The distinct optical properties of solid and liquid silicon nanoparticles are exploited to determine the distribution of gas-borne solid and liquid particles in situ using line-of-sight attenuation measurements carried out across a microwa…
Characterization of tracers for two-color laser-induced fluorescence thermometry of liquid-phase temperature in ethanol, 2 ethylhexanoic-acid/ethanol mixtures, 1-butanol, and o-xylene Open
Raw data set to the publication: https://doi.org/10.1364/AO.419684 The fluorescence spectra of dye solutions change their spectral signature with temperature. This effect is frequently used for temperature imaging in liquids and sprays bas…
Characterization of tracers for two-color laser-induced fluorescence thermometry of liquid-phase temperature in ethanol, 2 ethylhexanoic-acid/ethanol mixtures, 1-butanol, and o-xylene Open
Raw data set to the publication: https://doi.org/10.1364/AO.419684 The fluorescence spectra of dye solutions change their spectral signature with temperature. This effect is frequently used for temperature imaging in liquids and sprays bas…
Survivability of the thermographic phosphors YAG:Pr and SMP:Sn in a premixed flame Open
The survivability of two thermographic phosphors, YAG:Pr 3+ and SMP:Sn 2+ ((Sr,Mg) 3 (PO 4 ) 2 :Sn 2+ ), in a combustion environment is studied in the post-flame regime of a premixed propane/air flame. While the laser-induced luminescence …
Low-temperature and low-pressure effective fluorescence lifetimes and spectra of gaseous anisole and toluene Open
Fluorescence spectra and lifetimes of anisole and toluene vapor in nitrogen have been measured at conditions below ambient (257–293 K and 100–2000 mbar) upon excitation with 266-nm laser light to expand the applicable range of anisole and …
Low-temperature and low-pressure effective fluorescence lifetimes of gaseous anisole and toluene Open
Fluorescence spectra and lifetimes of anisole and toluene vapor in nitrogen measured at conditions below ambient (257–293 K and 100–2000 mbar) upon excitation with 266-nm laser light. Beuting2020_ApplPhysB_Raw-data.zip: This dataset contai…
Low-temperature and low-pressure effective fluorescence lifetimes of gaseous anisole and toluene Open
Fluorescence spectra and lifetimes of anisole and toluene vapor in nitrogen measured at conditions below ambient (257–293 K and 100–2000 mbar) upon excitation with 266-nm laser light. Beuting2020_ApplPhysB_Raw-data.zip: This dataset contai…
Spatial distribution of gas-phase synthesized germanium nanoparticle volume-fraction and temperature using combined in situ line-of-sight emission and extinction spectroscopy Open
In this study, emission and extinction spectroscopy were combined to in situ measure temperature and volume fraction distributions of liquid germanium nanoparticle gas-phase synthesized in an argon/hydrogen/germane flow through a microwave…
Multi-line SiO fluorescence imaging in the flame synthesis of silica nanoparticles from SiCl4 Open
Flame synthesis is a powerful and scalable method for generating nanoparticles for a wide range of applications. The chemical interaction of the flame and the precursor combined with the spatial and temporal temperature distribution determ…