3234 乱流熱伝達式を基にした水素エンジンのための壁面熱伝達式(S45-1 新燃料(1),S45 エンジンと新燃料)

概要

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Larger burning velocity and shorter quenching distance for hydrogen as compared with hydrocarbons bring larger heat transfer from burning gas to the combustion chamber wall in internal combustion engines. Because of a high cooling loss fraction by the large heat transfer, thermal efficiency of a hydrogen combustion engine is sometimes lower than that of conventionally fueled engines. Empirical correlation for total heat transfer from burning gas to the combustion chamber walls are often used to calculate the cooling loss in engines. However, previous research by the author et al. has shown that the widely used heat transfer correlation by Woschni cannot be properly applied to the hydrogen combustion even with adjusting the constants in it. This research tries to derive a new equation to describe the cooling loss in hydrogen combustion engines from the turbulent heat transfer equations for pipe flows.
一般社団法人日本機械学会の論文
2005-09-18