沙尘天气模拟系统混合段长度计算

The calculation of mixing section length of dust weather simulation system

应用气固两相流理论计算了沙尘天气模拟系统颗粒自由悬浮速度和混合段长度,利用FLUENT对该系统气固两相流场进行了数值模拟,其中连续相、颗粒相分别采用k-ε湍流模型和离散相模型,相间作用采用随机跟踪模型。结果表明,连续相流场分布规律与理论设计吻合较好,颗粒相浓度场分布可达到试验设计要求。

Based on gas-solid two-phase flow theory, particles free suspension velocity and mixing section length of dust weather simulation system are calculated and numerical simulation on gas-solid flow field is conducted by means of Fluent. The continuous phase and particle phase use the k-ε turbulence model and the discrete phase model respectively, phase interaction using stochastic tracking model. The results show that the continuous phase flow field distribution agrees well with the theoretical design, particle concentration distribution can meet the design of test requirements.