Measurements of the spatial distribution of local heat transfer coefficients in and around the valve and port of an axisymmetric 1C engine port assembly are presented as part of a combined experimental and predictive investigation of the significance of geometry on 1C engine port heat transfer.
Heat transfer results, which were measured using the transient liquid crystal technique, are presented for different pressure drops across the valve at different lift conditions for two valve and port geometries. A comparison is made between the two geometries under investigation and the effect of seat geometry on flow and heat transfer is examined.
From these results locations of high thermal stresses may be estimated that exist between the gradients of high and low heat transfer coefficients. Furthermore the liquid crystal data provides valuable information about the boundary layer behaviour of the inlet port flow.