对容积式超临界水热燃烧反应器内的燃料与氧化剂的混合与燃烧反应的物理化学过程进行模拟研究,揭示了反应参数、燃料特性及反应器喷嘴尺寸对反应器内温度场、浓度场和燃烧反应速率场的影响规律。研究结果表明,同轴喷射的非预混水热火焰发生化学反应的区域是狭窄的,并且反应器内的最高温度出现在以轴线上出现化学当量的轴向距离定义的火焰长度位置处。初始燃料浓度的增加会使反应器内的火焰温度升高、火焰长度延长;氧化系数的增大,不仅降低了火焰温度,并且可以缩短水热火焰长度;随着入射速度的增加,反应器内开始出现最高温度的位置远离反应器入口,火焰位置延迟。 The physical and chemical processes of mixing and combustion reaction between fuel and oxidant in a volumetric supercritical water-steam reactor are studied. The effects of reaction parameters, fuel characteristics and reactor nozzle size on the temperature field, concentration field and The influence law of combustion reaction rate field. The results show that the area where the co-jet non-premixed hydrothermal flame chemically reacts is narrow and the highest temperature within the reactor appears at the length of the flame defined by the axial equivalent length of the axis. The initial fuel concentration increases the flame temperature in the reactor and prolongs the flame length. The increase of the oxidation coefficient not only reduces the flame temperature, but also shortens the hydrothermal flame length. With the increase of the incident velocity, The point where the highest temperature starts to appear is away from the reactor inlet and the flame position is delayed.