Instantaneous Measurement of Local Concentration and Vapor Fraction in Liquid-Gas Mixtures by Laser-Induced Breakdown Spectroscopy
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Atomic emission obtained by irradiating liquid-gas mixtures with a focused high-energy laser was measured to quantify local concentration and vapor fraction. Equivalence ratio can be quantified from the ratio of peak emission intensities of the fuel-borne hydrogen and the nitrogen in the ambient gas.The FWHM of the hydrogen emission peak yields the fuel vapor fraction. This research demonstrates the applicability of this method to high pressure, liquid-gas mixtures, such as diesel fuel sprays.
