Planar Laser-Induced Fluorescence fuel concentration measurements in isothermal Diesel sprays.

This paper presents a complete methodology to perform fuel concentration measurements of Diesel sprays in isothermal conditions using the Planar Laser-Induced Fluorescence (PLIF) technique. The natural fluorescence of a commercial Diesel fuel is used with an excitation wavelength of 355 nm. The correction and calibration procedures to perform accurate measurements are studied. These procedures include the study of the fluorescence characteristics of the fuel as well as the correction of the laser sheet non-homogeneities and the losses due to Mie scattering, absorption and autoabsorption. The results obtained are compared with theoretical models and other experimental techniques.

[1]  N. Dam,et al.  Methods to correct planar laser-induced fluorescence distributions for local nonuniform laser attenuation. , 2000, Applied optics.

[2]  W. Ketterle,et al.  Laser in situ monitoring of combustion processes. , 1990, Applied optics.

[3]  Andreas Cronhjort,et al.  Long‐working‐distance microscope used for diesel injection spray imaging , 1996 .

[4]  N L Swanson,et al.  Limits of optical transmission measurements with application to particle sizing techniques. , 1999, Applied optics.

[5]  N Ladommatos,et al.  Optical diagnostics for in-cylinder mixture formation measurements in IC engines , 1998 .

[6]  L. Melton,et al.  Direct Calibration Procedures for Exciplex-Based Vapor/ Liquid Visualization of Fuel Sprays , 1990 .

[7]  J. Michael Ramsey,et al.  Enhanced fluorescence yields through cavity quantum-electrodynamic effects in microdroplets , 1994 .

[8]  Mark Jermy,et al.  Planar dropsizing by elastic and fluorescence scattering in sprays too dense for phase Doppler measurement , 2000 .

[9]  R. Abu-Gharbieh,et al.  Compensation method for attenuated planar laser images of optically dense sprays. , 2000, Applied optics.

[10]  R. Chang,et al.  Laser diagnostics for droplet characterization: Application of morphology dependent resonances , 1996 .

[11]  J V Pastor,et al.  Diesel spray image segmentation with a likelihood ratio test. , 2001, Applied optics.

[12]  K. Kohse-Höinghaus.  Laser techniques for the quantitative detection of reactive intermediates in combustion systems , 1991 .

[13]  F. Castro,et al.  A method to determine liquid concentration in non-stationary axisymmetric sprays , 1997 .

[14]  R. Bazile,et al.  Measurements of vaporized and liquid fuel concentration fields in a burning spray jet of acetone using planar laser induced fluorescence , 1995 .