PROCEDURE ESTIMATING TENDENCY OF HYDROCARBON FUEL TO FORM SOOT IN PROCESS OF COMBUSTION Russian patent published in 2003 - IPC

FIELD: evaluation of operational properties of motor fuels. SUBSTANCE: according to invention present values of radiant flux registered in the form of photocurrents Φ_ref and Φ with the use of photometric device correspondingly from flames of reference and tested fuel as they burn out in filter-free diffusion-flame burner are measured, value of photocurrent Φ0ref

from flame of reference fuel on threshold of fuming is recorded. Smoothing and numerical differentiation of obtained present values of photocurrents Φ_ref and Φ in time t are conducted in order to determine values of derivative photocurrents and in points corresponding to value of photocurrent Φ0ref from flame of reference fuel on threshold of fuming. Ratio of obtained values of derivatives which is sought- for indicator of blackness of diffusion flame characterizes tendency of tested hydrocarbon fuel to soot formation. EFFECT: twofold reduction of test time without decrease of accuracy. 2 dwg, 1 tbl