湍流燃烧弹内部湍流稳定区域分析

Analysis of Turbulent Stability Region in Turbulent Combustion Chamber

论文采用数值模拟方法在不同风扇强度和初始环境压强下对湍流燃烧弹中心位置的湍流强度以及湍流稳定区域半径变化规律进行计算。运用Fluent软件并采用RNG K-e湍流模型进行研究。研究表明湍流燃烧弹中心监测点湍流强度随着风扇压差的增大而增大,随着初始环境压强的增大而减小。保持初始环境压强相同时,湍流稳定区域半径随着风扇强度增大而增大;在保持相同风扇强度下,湍流稳定区域半径随着初始压强增大而增大。并且最小湍流稳定区域半径即核心稳定半径大小在三个不同截面上差异不大。

In this paper,numerical simulation method is used to calculate the turbulence intensity at the center of turbulent combustor under different fan strength and initial ambient pressure. This paper uses Fluent software and uses RNG K-e turbulence model to study. The study shows that the turbulence intensity of the central monitoring point of the turbulent burner increases with the increase of the fan pressure difference and decreases with the increase of the initial ambient pressure. While maintaining the same initial pressure,the turbulence stability radius increases with the fan strength. And with the same fan strength,the radius of turbulence stability region increases with the initial pressure. Moreover,the radius of the minimum turbulence stability region,that is,the core stability radius,has little difference in three different sections.