Synchrotron radiation studies of additives in combustion I: Water
- Mitchell, James,
- Di Stasio, S.
- Le Garrec, Jean-Luc
- Florescu-Mitchell, Anca Irina
DOIAbstract
International audienceSmall Angle X-ray Scattering (SAXS) measurements have been performed on a partially pre-mixed ethylene-air flame with and without the introduction of a water aerosol for the same flame height. Our measurements are sensitive to particles with radii in the range of 6-78 nm. It is found that water addition leads to soot suppression below the detection limit at low heights along the flame centerline (<11 mm) and to an increased sooting tendency higher up in the flame. There, larger primary particles (Rg˜20-45 nm) shaped as agglomerates with fractal dimension about 2 are observed together with a large number of smaller (Rg ˜ 10 nm) smooth particles, which we identify with sub-primary units observed in previous work on pure ...
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