caa a22 4500 606197036 CHVBK 20210128100927.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s00348-014-1871-9 doi (NATIONALLICENCE)springer-10.1007/s00348-014-1871-9 Experimental analysis and semicontinuous simulation of low-temperature droplet evaporation of multicomponent fuels [Elektronische Daten] [S. Lehmann, S. Lorenz, E. Rivard, D. Brüggemann] Low-pollutant and efficient combustion not only in internal combustion engines requires a balanced gaseous mixture of fuel and oxidizer. As fuels may contain several hundred different chemical species with different physicochemical properties as well as defined amounts of biogenic additives, e.g., ethanol, a thorough understanding of liquid fuel droplet evaporation processes is necessary to allow further engine optimization. We have studied the evaporation of fuel droplets at low ambient temperature. A non-uniform temperature distribution inside the droplet was already considered by including a finite thermal conductivity in a one-dimensional radial evaporation model (Rivard and Brüggemann in Chem Eng Sci 65(18):5137-5145, 2010). For a detailed analysis of droplet evaporation, two non-laser-based experimental setups have been developed. They allow a fast and relatively simple but yet precise measurement of diameter decrease and composition change. The first method is based on collecting droplets in a diameter range from 70 to 150µm by a high-precision scale. A simultaneous evaluation of mass increase is employed for an accurate average diameter value determination. Subsequently, a gas chromatographic analysis of the collected droplets was conducted. In the second experiment, evaporation of even smaller droplets was optically analyzed by a high-speed shadowgraphy/schlieren microscope setup. A detailed analysis of evaporating E85 (ethanol/gasoline in a mass ratio of 85%/15%) and surrogate fuel droplets over a wide range of initial droplet diameters and ambient temperatures was conducted. The comparison of experimental and numerical results shows the applicability of the developed model over a large range of diameters and temperatures. Springer-Verlag Berlin Heidelberg, 2014 Lehmann S. Chair of Engineering Thermodynamics and Transport Processes (LTTT), Bayreuth Engine Research Center (BERC), University of Bayreuth, Bayreuth, Germany aut Lorenz S. Chair of Engineering Thermodynamics and Transport Processes (LTTT), Bayreuth Engine Research Center (BERC), University of Bayreuth, Bayreuth, Germany aut Rivard E. Chair of Engineering Thermodynamics and Transport Processes (LTTT), Bayreuth Engine Research Center (BERC), University of Bayreuth, Bayreuth, Germany aut Brüggemann D. Chair of Engineering Thermodynamics and Transport Processes (LTTT), Bayreuth Engine Research Center (BERC), University of Bayreuth, Bayreuth, Germany aut Experiments in Fluids Springer Berlin Heidelberg 56/1(2015-01-01), 1-12 0723-4864 56:1<1 2015 56 348 https://doi.org/10.1007/s00348-014-1871-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00348-014-1871-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lehmann S. Chair of Engineering Thermodynamics and Transport Processes (LTTT), Bayreuth Engine Research Center (BERC), University of Bayreuth, Bayreuth, Germany aut NATIONALLICENCE 700 1- Lorenz S. Chair of Engineering Thermodynamics and Transport Processes (LTTT), Bayreuth Engine Research Center (BERC), University of Bayreuth, Bayreuth, Germany aut NATIONALLICENCE 700 1- Rivard E. Chair of Engineering Thermodynamics and Transport Processes (LTTT), Bayreuth Engine Research Center (BERC), University of Bayreuth, Bayreuth, Germany aut NATIONALLICENCE 700 1- Brüggemann D. Chair of Engineering Thermodynamics and Transport Processes (LTTT), Bayreuth Engine Research Center (BERC), University of Bayreuth, Bayreuth, Germany aut NATIONALLICENCE 773 0- Experiments in Fluids Springer Berlin Heidelberg 56/1(2015-01-01), 1-12 0723-4864 56:1<1 2015 56 348