HAP三组元推进剂鱼雷旋转燃烧室内流场数值模拟

Numerical Simulation on Turbulent Flow in Rotary Combustion Chamber for HAP Tri-propellant of Thermal Torpedo

针对HAP三组元推进剂鱼雷旋转燃烧室的特点和工作过程,建立了模拟HAP三组元推进剂鱼雷旋转燃烧室湍流两相流动与燃烧的数学模型,对燃烧室的边界条件和初始条件进行了分析和设定。在此基础上运用FLUENT软件对燃烧室内流场进行了数值模拟,得到了不同工况下燃烧室内流场的状态参数分布图。仿真结果表明,随着旋转速度的提高,燃烧室内的湍流流动和掺混过程加强,回流向中心区和头部区扩展,燃烧过程中的蒸发、掺混、扩散和传热等过程得到加强,燃烧强度加强,燃烧过程也更加均匀稳定;旋转因素可以提高燃烧室的燃烧效率,相对于固定燃烧室来说,旋转燃烧室燃烧腔的尺寸可以缩小。

On the basis of the characteristics and working process of HAP tri-propellant in torpedo rotary combustion chamber, mathematical models for the turbulent two-phase flow and combustion process were established. The initial and boundary conditions were investigated and set accordingly. Numerical simulations were conducted by using the software FLUENT, and the distributions of flow fields within the combustion chamber under different regimes were obtained. The results indicate that the turbulent flow and blending process is enhanced and the reverse flow moves to center and head areas. The fuel vaporization, blending, diffusion and heat transfer during combustion process as well as combustion are enhanced, and combustion process becomes much more uniform and steady. Therefore, the combustion efficiency can be improved and the size of rotary combustion chamber could be smaller than the fixed combustion chamber.