水素燃焼機関における作動流体の熱物性値と壁面熱伝達の関係(熱工学,内燃機関,動力など)

概要

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A larger burning velocity and a shorter quenching distance for hydrogen as compared with hydrocarbons bring a higher degree of constant volume and a larger cooling loss from burning gas to the combustion chamber wall in internal combustion engines. Because of the large cooling loss, the reduction of the cooling loss are crucial for improving the thermal efficiency in hydrogen combustion engines. Empirical correlation for total heat transfer from burning gas to the combustion chamber walls are often used to calculate the cooling loss. However, previous research by the authors has shown that the widely used heat transfer correlation reported by Woschni cannot be properly applied to the hydrogen combustion. For this background, this research analyzes the relationship between characteristics of thermophysical properties of working fluid and heat transfer to the wall in a hydrogen-fueled spark-ignition engine.
一般社団法人日本機械学会の論文
2005-02-25