EXPERIMENTAL ANALYSIS ON EXTERNAL SURFACE CONVECTIVE-RADIATIVE HEAT TRANSFER IN STATIONARY DIESEL ENGINES

Autor/autori: Veneția SANDU, Virgil-Barbu UNGUREANU, Mircea IVĂNOIU, Liviu COSTIUC

Abstract: The present paper pursued a more accurate equation of convection and radiation heat loss released to the environment through the outer surfaces, by means of energy balance applied to internal combustion engine. The heat transfer coefficient is calculated using energy balance performed in steady operation modes, with tests performed on an instrumented dynamometric engine bench. For this particular application there were considered several distinct heat transfer conditions in external flow – free convection and forced laminar convection – being investigated semi-empirical equations of the same kind, suggested in literature. The validation of external surface temperatures was done using Infra Red thermography

Keywords: heat transfer, convection-radiation, energy balance, heat engine, IR thermovision

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