转子机结构简单、功率密度大但其狭长燃烧室和较短的燃烧时间导致燃烧不完全，油耗和排放高，采用缸内直喷氢气和氧气可实现转子机的高效零排放。但氢气和氧气在转子机中容易发生混合不均匀、早燃及爆燃等问题。本项目对氢气和氧气在转子机内混合气的形成机制、湍流燃烧过程及控制策略进行研究。在伴有水蒸气及液态水的条件下，通过定容燃烧弹和快压机实验，探明氢、氧、水三元二相混合物的着火特性与燃烧机理。基于转子机CFD数值模拟，在进气腔喷氧、压缩腔喷氢和燃烧腔喷水条件下，探索氢、氧、水多相流混合物在转子机狭长变截面流道内的混合气形成机制及运动规律，揭示低温氢氧气及缸内喷水对控制氢氧混合气反应速率和早燃及爆燃的作用机理。通过转子机台架实验，探究氢氧混合气在实际转子机中的湍流着火与燃烧机理及控制策略，提出氢氧转子机高效、稳定燃烧的控制方法，为其应用奠定理论基础。

The rotary engine generally possesses properties of simple construction and high power density. However, the narrow and long combustion chamber and short combustion time could result in the incomplete combustion, high fuel consumption and emissions. The adoption of direct injections of hydrogen and oxygen could enable the rotary engine to gain a high thermal efficiency and zero emissions. However, the hydrogen and oxygen in the rotary engine could lead to the inhomogeneous mixing, pre-ignition and deflagration. This work will conduct investigations on the mixture formation, combustion mechanism and control strategy of a hydrogen-oxygen fueled rotary engine. The ignition and burning characteristics of hydrogen-oxygen-water blends under liquid and gaseous water two phase condition are experimentally investigated through constant volume combustion vessel and rapid compression machine tests. The mixture formation mechanism and flow characteristics of two-phase hydrogen-oxygen-water mixtures within the narrow and variable flow path in the rotary engine are investigated based on CFD simulation under the conditions of oxygen injection at the intake chamber, hydrogen injection at the compression chamber and water injection at the combustion chamber. The mechanisms of low temperature hydrogen and oxygen injections, and water injection on suppressing the reaction rate, pre-ignition and deflagration of hydrogen-oxygen mixtures are explored. Bench tests are conducted to investigate the turbulent ignition and combustion properties of hydrogen-oxygen mixtures. The control strategy of realizing the high-efficiency and stable combustion for the hydrogen-oxygen fueled rotary engine is proposed to lay a theoretical foundation for its application.