Dual-Wavelength Laser-Absorption-Scattering (LAS) Technique for Mixture Concentration Distribution Measurement of Gasoline Spray

Abstract

A dual-wavelength laser absorption-scattering (LAS) technique was developed to analyze the mixture formation process in a D.I. gasoline spray. P-xylene was used as a test fuel and the second harmonic (532nm) and the fourth harmonic (266nm) of an Nd : YAG laser were simultaneously illuminated the spray, which was injected into a high temperature and high pressure constant volume vessel. The dual-wave length LAS images were acquired by two CCD cameras and processed by a computer. The distribution of droplets and vapor concentrations in a D.I. gasoline spray were quantitatively analyzed.