caa a22 4500 445372699 CHVBK 20180317142952.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s00340-010-3942-9 doi (NATIONALLICENCE)springer-10.1007/s00340-010-3942-9 Mid-infrared laser-absorption diagnostic for vapor-phase fuel mole fraction and liquid fuel film thickness [Elektronische Daten] [J. Porter, J. Jeffries, R. Hanson] A novel two-wavelength mid-infrared laser-absorption diagnostic has been developed for simultaneous measurements of vapor-phase fuel mole fraction and liquid fuel film thickness. The diagnostic was demonstrated for time-resolved measurements of n-dodecane liquid films in the absence and presence of n-decane vapor at 25°C and 1atm. Laser wavelengths were selected from FTIR measurements of the C-H stretching band of vapor n-decane and liquid n-dodecane near 3.4μm (3000cm−1). n-Dodecane film thicknesses <20μm were accurately measured in the absence of vapor, and simultaneous measurements of n-dodecane liquid film thickness and n-decane vapor mole fraction (300ppm) were measured with <10% uncertainty for film thicknesses <10μm. Apotential application of the measurement technique is to provide accurate values of vapor mole fraction in combustion environments where strong absorption by liquid fuel or oil films on windows make conventional direct absorption measurements of the gas problematic. Springer-Verlag, 2010 Porter J. High Temperature Gasdynamics Laboratory, Department of Mechanical Engineering, Stanford University, 94305, Stanford, CA, USA aut Jeffries J. High Temperature Gasdynamics Laboratory, Department of Mechanical Engineering, Stanford University, 94305, Stanford, CA, USA aut Hanson R. High Temperature Gasdynamics Laboratory, Department of Mechanical Engineering, Stanford University, 94305, Stanford, CA, USA aut Applied Physics B Springer-Verlag 102/2(2011-02-01), 345-355 0946-2171 102:2<345 2011 102 340 https://doi.org/10.1007/s00340-010-3942-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00340-010-3942-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Porter J. High Temperature Gasdynamics Laboratory, Department of Mechanical Engineering, Stanford University, 94305, Stanford, CA, USA aut NATIONALLICENCE 700 1- Jeffries J. High Temperature Gasdynamics Laboratory, Department of Mechanical Engineering, Stanford University, 94305, Stanford, CA, USA aut NATIONALLICENCE 700 1- Hanson R. High Temperature Gasdynamics Laboratory, Department of Mechanical Engineering, Stanford University, 94305, Stanford, CA, USA aut NATIONALLICENCE 773 0- Applied Physics B Springer-Verlag 102/2(2011-02-01), 345-355 0946-2171 102:2<345 2011 102 340 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer