Experimental and computational investigation is carried out to elucidate the mechanism of autoignition of Jet Fuels and Surrogates in nonpremixed flows at elevated pressures up to 6 bar. The counterflow configuration is employed. In this configuration a axisymmetric flow of a gaseous oxidizer stream is directed over the surface of an evaporating pool of a liquid fuel. The oxidizer stream is a mixture of oxygen and nitrogen. The jet fuels tested are JP5, JetA, and JP8, and the surrogates tested are the Aachen surrogate, consisting of 80% n-decane and 20% 1,3,5-trimethylbenzene by mass, Surrogate C made up of 60% dodecane, 20% methylcyclohexane, and 20% o-xylene by volume, and the Princeton Surrogate made up of 49.6% n-dodecane, 24.3% iso-octane, 19.8% n-propylbenzene, and 6.3% 1,3,5- trimethylbenzene by mass. The experiments are conducted at a fixed value of mass fraction of oxygen and at a fixed low value of the strain rate. The temperature of the oxidizer stream at autoignition, Tig, is measured as a function of pressure, p. Computations were carried out using a detailed mechanism and critical conditions of autoignition for surrogates were predicted and compared with measurements.
|Titolo:||Experimental and computational investigation of autoignition of jet fuels and surrogates in nonpremixed flows at elevated pressures|
|Data di pubblicazione:||2017|
|Appare nelle tipologie:||04.1 Contributo in Atti di convegno|
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