Self-Ignition of Diesel-Engine Model Fuels At High Pressures

A study of ignition delay of diesel fuel sprays

“…However, the ignition delay times for both AE 0:05 mm 3 4 and AE 0:025 mm 3 16 holes remain unchanged and exhibit a step in the Arrhenius plot curve. This step change, which is similar to that commonly observed in shock tube and flow reactor experiments with homogeneous mixtures, is known as the negative temperature coefficient (NTC) effect window [18]. The similarity of this curve for the smallest orifice nozzle to that observed with homogeneous charge mixtures suggests that the ignition delay here (ô 1 ô 2 ) is approximately equal to ô 2 , the chemical ignition delay, because of the minimized physical ignition delay for this nozzle.…”

Chemical mechanistic analysis of additive effects in homogeneous charge compression ignition of dimethyl ether

“…The spatially non-dimensional method has been frequently used to predict ignition timing, including that of cool flames [6,7,9,13]. Models properly including heat transfer and consequent spatial inhomogeneity are needed for a more complete description of pressure histories [18,19], however it was reported that Curran et al model well reproduces the ignition timing in a HCCI engine [6] and ignition delay in a shock tube [31,32]. The observed and calculated cool flame compositions of fuel and products such as HCHO were well consistent with the results in our previous studies.…”

Development of an Experimental Database and Kinetic Models for Surrogate Diesel Fuels

“…Additionally, ternary blends of n-hexadecane, decalin, and 1-methylnapthalene have been used to study ignition quality and the effects of cetane improver additives in fundamental ignition bomb [75], and highpressure flow reactor [76] experiments over a temperature range from 500-900 K at a pressure near 1.25 MPa and a fixed reaction time of 1.8 s. In addition, ignition delays and chemiluminescence during the autoignition process have been measured in shock tube studies for the previously discussed IDEA fuel for several pressures, temperatures, and equivalence ratios [77].…”