The combustion of kerosene with the polymer additive polyisobutylene (PIB) was\nexperimentally investigated. The aim of the study was to measure the effect of PIB kerosene\non the efficiency of combustion chamber cooling and the combustion efficiency of the liquid propellant\nfor a rocket engine operating on kerosene and gaseous oxygen (GOX). The study was conducted\non an experimental rocket engine using kerosene wall film cooling in the combustion chamber.\nFire tests showed that the addition of polyisobutylene to kerosene had no significant effect on the\ncombustion efficiency. However, analysis of the wall temperature measurement results showed that\nthe use of PIB kerosene is more effective for film cooling than pure kerosene, which can increase the\nefficiency of combustion chamber cooling and subsequently increase its reliability and reusability.\nThus, the findings of this study are expected to be of use in further investigations of wall film\ncooling efficiency.
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