摘要
本文由多流体两相流模型、气相湍流κ-ε模型和颗粒湍流代数模型出发,成功地模拟了真实形状大速差射流预燃室中三维湍流回流两相流动,得到了这类复杂的气固两相流中不同纵横截面上气相速度场、颗粒速度场及浓度场和两相湍流度场的分布,并且获得了与实验定性一致的合理结果,揭示了预燃室中气固两相流动与混合的主要物理特征,探讨了大速差射流技术稳焰和强化燃烧的两相流动机理。
The three-dimensional turbulent recirculating gas-particle flows in a combus-tor of co-flow jets with large velocity difference are simulated by the multi-fluid model and k-8 turbulence model. Predicted results of gas velocity, particle velocity and particle mass flux distributions are in qualitative agreement with experiments, and reveal the machanism of flame stabilization and combustion intensification in such combustors. The discrepancy between pre--dictions and experiments, especially ,in turbulence intensities, indicates the inadequacy of Hinze-Tchen's model for modeling particle turbulence.
出处
《力学学报》
EI
CSCD
北大核心
1990年第1期28-34,共7页
Chinese Journal of Theoretical and Applied Mechanics
基金
国家自然科学基金
关键词
射流
预燃室
回流
湍流
模拟
两相
co-flow jets with large velocity difference, gas-particle flows, multi-fluid model
