直接噴射層状給気による水素燃焼の冷却損失低減(熱工学,内燃機関,動力など)

概要

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Reduction of cooling loss from burning gas to the wall is crucial for improving thermal efficiency in hydrogen combustion engines. The research proposes the direct injection stratified charge to reduce the cooling loss in hydrogen combustion and analyzes its characteristics. The stratified charge in this research adopts direct fuel injection into lean mixture and spark ignition. The stratification is controlled by a fraction of directly injected fuel to the totally supplied fuel. A lowered temperature of the burning gas around the combustion chamber wall due to the leaner mixture by the stratification is expected to effectively reduce the heat transfer. The characteristics are analyzed in a constant volume combustion vessel by using measured pressure data and combustion gas compositions. Flame propagation is also observed for some cases.
2004-03-25