Abstract
Within this work the effects of blending oxymethylene ethers (OMEn) to a diesel surrogate (50 mol% n-dodecane, 30 mol% farnesane, and 20 mol% 1-methylnaphthalene) were investigated by performing two different types of experiments: measurements of the sooting propensity and of the laminar burning velocity, each in laminar premixed flames. For the sooting propensity, OME3, OME4, and OME5 were considered as blending compounds—each in mass fractions of 10%, 20%, and 30%. The sooting propensity was found to depend strongly on the OMEn blending grade but not on its chain length. In addition, the effect on the laminar burning velocity was studied for OME4 and the admixture of 30% OME4 with diesel surrogate for the first time. This admixture was found to lead to increased burning velocities; however, much less than might be foreseen when considering the respective values of the neat fuels.
Highlights
Academic Editors: Goutham Kukkadapu and Evangelos G
As expected because of the non-existence of any C-C bonds within oxymethylene ethers (OMEn), the soot threshold of the diesel surrogate/OMEn mixtures is shifted to higher φ values with an increased OMEn content
OME4 in the diesel surrogate mixture amounts, to up to 30% (w/w), the laminar burning velocity (LBV) values are solely increased by about 4 cm/s to 87 cm/s (±2 cm/s) at φ = 1.1 the location of the peak value
Summary
Academic Editors: Goutham Kukkadapu and Evangelos G. OMEn attracted much interest for application in diesel engines due to several reasons [2]. (I) The absence of C-C bonds (see Figure 1)
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