基于灌水器流量的湍流模型适应性研究

Research on Adaptability of Different Turbulent Models Based on Flow Discharge of the Drip Emitters

采用通用流体模拟软件FLUENT所提供的5种不同的湍流模型:标准k-ε模型、RNG k-ε模型、Real-izable k-ε模型、标准k-ω模型、SST k-ω模型,对滴灌灌水器微流道内流场水流流动进行了数值模拟。通过对比模拟得出的宏观参量——灌水器的流量与实验室试验的结果,评价了这些不同的湍流模型对不同类型灌水器内流场流量模拟效果的影响,为灌水器内流场的理论分析以及灌水器流道结构的工程设计提供了一定的参考依据。

Five different turbulence models provided by current fluid simulation software FLUENT , such as standard k-ε model, RNG k-ε model, Realizable k-ε model, standard k-ω model and SST k-ω model, have been used to simulate the flow field of drip emitters in this paper. By comparing the numerical simulation results with the experimental data of the macroscopical parameter, namely the flow discharge of drip emitters, the influence of different turbulence models on the simulation results of different types of drip emitters is estimated. This will supply several reference bases for the theoretical analysis of flow field and the structure design of flow passage of drip emitter.