Journal ArticleDOI
Acetone laser-induced fluorescence behavior for the simultaneous quantification of temperature and residual gas distribution in fired spark-ignition engines.
TLDR
Calibration results of the fluorescence signal intensities in nitrogen, air, and an exhaust-gas-air mixture in the wide range from 298 to 748 K and from 0.2 bar (0.02 MPa) to 20 bars for the two important excitation wavelengths 308 and 248 nm are presented.Abstract:
Although the fluorescence behavior of acetone has already been examined widely, the amount of data is still not sufficient for the quantification of signals over the parameter field relevant for combustion engines. This leads to large uncertainties when new excitation wavelengths are applied or in cases where temperature and pressure and bath gas composition dependences of the fluorescence yield must be extrapolated from models. This work presents calibration results of the fluorescence signal intensities in nitrogen, air, and an exhaust-gas-air mixture in the wide range from 298 to 748 K and from 0.2 bar (0.02 MPa) to 20 bars for the two important excitation wavelengths 308 and 248 nm. Based on this data, measurements of temperature and exhaust gas concentrations in a fired spark ignition engine were performed with high accuracy in single-shot images also.read more
Citations
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Journal ArticleDOI
Temperature measurement techniques for gas and liquid flows using thermographic phosphor tracer particles
TL;DR: In this article, a review of temperature measurement techniques for fluid flows that are based on thermographic phosphors, which are materials that possess temperature-dependent luminescence properties, is presented.
Journal ArticleDOI
Simultaneous temperature, mixture fraction and velocity imaging in turbulent flows using thermographic phosphor tracer particles
TL;DR: An optical diagnostic technique based on seeded thermographic phosphor particles, which allows the simultaneous two-dimensional measurement of gas temperature, velocity and mixture fraction in turbulent flows, is presented.
Journal ArticleDOI
Structure of evaporating single- and multicomponent fuel sprays for 2nd generation gasoline direct injection
TL;DR: In this article, the effect of fuel properties on spray formation and evaporation was investigated for a hollow-cone spray of a piezoelectric injector for Direct Injection Spark Ignition (DISI) engines.
Journal ArticleDOI
Investigating the Development of Thermal Stratification from the Near-Wall Regions to the Bulk-Gas in an HCCI Engine with Planar Imaging Thermometry
Nicolas Dronniou,John E. Dec +1 more
Journal ArticleDOI
High precision in-cylinder gas thermometry using Laser Induced Gratings: Quantitative measurement of evaporative cooling with gasoline/alcohol blends in a GDI optical engine
TL;DR: The first application of LITGS for precision thermometry in a firing GDI optical engine is reported in this article, where Crank-angle resolved temperature values were derived from LITG signals generated in fuel vapour with a pressure dependent precision in the range 1-10% allowing differences in evaporative or charge cooling effects arising from a variety of ethanol and methanol blends with a model gasoline fuel to be quantified.
References
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Journal ArticleDOI
Tracer-LIF diagnostics: quantitative measurement of fuel concentration, temperature and fuel/air ratio in practical combustion systems
Christof Schulz,Volker Sick +1 more
TL;DR: In this paper, the fundamental concepts for how to devise and apply quantitative measurement techniques for studies of fuel concentration, temperature, and fuel/air ratio in practical combustion systems, with some emphasis on internal combustion engines.
Journal ArticleDOI
Measurements and modeling of acetone laser-induced fluorescence with implications for temperature-imaging diagnostics
TL;DR: The model results in conjunction with the photophysics data provide guidance for the application of temperature diagnostics over a range of conditions while also suggesting useful multiparameter imaging approaches.
Journal ArticleDOI
Advanced gasoline engine development using optical diagnostics and numerical modeling
TL;DR: In this article, the authors discuss the use of optical diagnostics and CFD in five gasoline-engine combustion systems: homogeneous spark-ignition port-fuel-injection (PFI), HCCI engines, WG-SIDI, SG-SidI, and SIDI engines.
Journal ArticleDOI
Temperature and pressure dependences of the laser-induced fluorescence of gas-phase acetone and 3-pentanone
TL;DR: In this paper, the S1 state of acetone and 3-pentanone was studied as a function of temperature and pressure using excitation at 248 nm and 277 and 312 nm, respectively.
Downsizing of gasoline engine: an efficient way to reduce CO2emissions
TL;DR: In this paper, a 0.8 L turbocharged gasoline engine was used to achieve a reduction in CO 2 emission by about 18% in warm engine conditions, while keeping low specific fuel consumption level over the whole range of engine running conditions.
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