アルゴンクローズドサイクル水素エンジンの研究

(第6報 水素と酸素の混合比が異常燃焼および熱効率に与える影響)

抄録

The authors have studied an argon closed-cycle hydrogen engine in regard to system configuration, starting and fueling methods, thermal efficiency and losses, the effect of water vapor in the working gas, and the effect of argon concentration. Argon concentration is a trade-off between increased thermal efficiency and worsened knocking, and no method has been found to balance the two. Since the closed-cycle engine recirculates all the exhaust gas except water, the ratio of oxygen, hydrogen, and argon can be set freely. In this study, the oxygen/hydrogen mixing ratio was extended to the extreme range to investigate the possible operating range. The compression ratio and argon concentration were also varied to investigate the effects on knocking and thermal efficiency.