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5 V. N. Karazin Kharkiv National University, 4 Svobody Sq., 61002 Kharkiv, Ukraine Email: alyokhina@karazin.ua In the paper, the cause that makes it difficult to use uncerti­ fied fuels has been identified – the uncertainty and variability of their composition. The mathematical model and the meth­ od that allow one to determine such a fuel composition in the combustion process are developed. Optimal parameters of the combustion process are proposed. The limitations im­ posed by the model on the method used are determined.

Model and method of conditional formula determination of oxygen-containing hydrocarbon fuel in combustion