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| 气固两相流动中的一种颗粒相湍流模型 |
| A particle turbulence model in the gas-particle two-phase flow |
| 投稿时间：2020-05-31 |
| DOI：10.13259/j.cnki.eri.2022.03.008 |
| 中文关键词: 两相流动 旋流 双尺度脉动 |
| 英文关键词:gas-particle flows swirl flow two-scale fluctuation |
| 基金项目:国家重点研发计划项目(2018YFB0604204) |
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| 中文摘要: |
| 颗粒湍流有其自身的产生与耗散。鉴于颗粒湍流模型对预测精度有很大影响，建立了考虑各向异性和两相相互作用的颗粒相湍流模型，采用代数雷诺应力模型封闭气固两相产生项及两相速度关联产生项。分别利用本模型和kg -εg -kp -εp -θ模型对比研究了轴对称旋流两相流动的颗粒相平均速度及脉动速度，结果显示，本模型的模拟结果比kg -εg -kp -εp -θ模型的更接近于实验数据，表明本模型更符合颗粒湍流的内在特性。 |
| 英文摘要: |
| Particle turbulence has its own generation and dissipation. Particle turbulence model has a great impact on the prediction accuracy. So, a particle turbulence model was established in which the anisotropy and the interaction between two phases were considered, and the generation terms of both gas-particle two phases and two-phase velocity correlations were closed by the algebraic Reynolds stress model. Numerical simulation on axisymmetric swirl gas-particle flow was performed using present model and kg-εg-kp-εp-θ turbulence model. Results showed that the predicted results such as particle mean velocity and fluctuation velocity by present model were closer to the experimental ones, comparing with those by kg-εg-kp-εp-θ model. It indicated that the present model was more consistent with the inherent characteristics of particle turbulence. |
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