Local heat flux from the flame to the combustion chamber wall, q̇, was measured the wall surfaces of a rapid compression-expansion machine which can simulate diesel combustion. Temperature of the flame zone, T1, was calculated by a thermodynamic two-zone model using measured values of cylinder pressure and flame volume. A local heat transfer coefficient was proposed which is defined as q̇/(T1-Tw). Experiments showed that the local heat transfer coefficient depends slightly on the temperature difference, T1-Tw, but depends significantly on the velocity of the flame which contacts the wall surface.
Effects of Flame Motion and Temperature on Local Wall Heat Transfer in a Rapid Compression-Expansion Machine Simulating Diesel Combustion
Sae Technical Papers
International Fuels & Lubricants Meeting & Exposition ; 1992
01.10.1992
Aufsatz (Konferenz)
Englisch
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