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Heat transfer research is one of key topics for internal combustion engine development. However, heat transfer study is a challenging task due to high value and rapid change in temperature and heat flux inside the combustion chamber. In this paper, experimental study is presented with implementation of heterogeneous gradient heat flux sensors. Heat flux was measured by a probe and at several points of a firedeck. Heat fraction to a firedeck was calculated at various engine speeds. The heat transfer coefficient at investigated points is calculated. Comparison with other studies is provided.

Research of heat transfer in combustion chamber of diesel engine on idle by gradient heat flux measurement method