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为了解旋转对两相湍流燃烧过程的影响,采用RNG κ-ε湍流模型,ED湍流燃烧模型和离散液滴模型,对转速n=0r/min、1000r/min和2000r/min三种工况下,单组元推进剂在某型水下航行器旋转燃烧室中的燃烧进行了三维仿真,得到了燃烧室内气相速度、静压、液滴轨迹和推进剂质量分数的分布,并对计算结果进行了比较和分析。结果表明,随着转速的增大,静压力升高,燃烧流场回流区中心的位置前移,回流区长度减小,燃烧室内燃气流场和液滴轨迹呈现螺旋状态,推进剂质量分数向燃烧室头部集中。说明旋转使得液体推进剂燃烧加剧,燃烧效率提高,燃烧室结构可以优化缩小。
In order to understand the influence of rotation on the combustion process of two-phase turbulent flow, RNG κ-ε turbulence model, ED turbulent combustion model and discrete droplet model were used. , The combustion of a single component propellant in the rotary combustion chamber of a certain type of underwater vehicle was simulated and the distribution of the gas velocity, the static pressure, the droplet trajectory and the mass fraction of the propellant in the combustion chamber were obtained, and the calculation results were carried out For comparison and analysis. The results show that with the increase of the rotating speed, the static pressure increases, the center of the recirculation zone moves forward, the recirculation zone length decreases, and the gas flow field and droplet trajectory in the combustion chamber presents a spiral state. The propellant mass fraction The head of the combustion chamber is concentrated. Rotation makes liquid propellant combustion worsened combustion efficiency, combustion chamber structure can be optimized to reduce.