The rapid development of electric vehicles has drawn extensive attention to using rotary engines as small-scale power generation devices. However, their wide application has been limited by drawbacks such as low combustion efficiency and high emissions. Therefore, to obtain rotary engines with high combustion efficiency and low emissions, this study explored the strengthening effect of natural gas/hydrogen hybrid fuel (NHHF) and Triangular Rotor Piston (TRP) structure on the combustion in the turbulent jet ignition rotary engine (TJI-RE) at different ignition advance angles (IAAs). Additionally, an experimental platform and a three-dimensional computational model for TJI-RE fueled by natural gas/hydrogen hybrid fuel (NHHF) were established in this study. The research results indicated that the TRP structure altered the combustion process by affecting the ignition area in the ignition stage and the turbulence kinetic energy during the combustion stroke. Furthermore, the SC-shaped cylinder exhibited the highest peak pressure for any fixed IAA. When the IAA was fixed at 30°CA (BTDC), the TJI-RE with the SC-shaped cylinder experienced a 12.12% increase in peak pressure and a 4.1% increase in indicated work compared to the FP-shaped cylinder. Additionally, the CO emission was reduced by 13.79%, while the NO emission showed a significant increase.

中文翻译：

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氢混合天然气旋转发动机活塞结构与湍流喷射点火方式耦合机理探讨

电动汽车的快速发展引起了利用转子发动机作为小型发电装置的广泛关注。然而，其广泛应用受到燃烧效率低、排放高等缺点的限制。因此，为了获得高燃烧效率和低排放的旋转发动机，本研究探讨了天然气/氢混合燃料（NHHF）和三角转子活塞（TRP）结构对湍流喷射点火旋转发动机（TJI）燃烧的强化作用。 -RE）在不同的点火提前角（IAA）。此外，本研究还建立了天然气/氢混合燃料（NHHF）TJI-RE的实验平台和三维计算模型。研究结果表明，TRP结构通过影响点火阶段的点火面积和燃烧冲程的湍流动能来改变燃烧过程。此外，SC 形圆柱体在任何固定 IAA 中表现出最高的峰值压力。当 IAA 固定在 30°CA (BTDC) 时，与 FP 形气缸相比，具有 SC 形气缸的 TJI-RE 峰值压力增加了 12.12%，指示功增加了 4.1%。此外，CO排放量减少了13.79%，而NO排放量则显着增加。