摘要
本文应用k-ε湍流模式,建立了径向射流的数学模型,在均匀环境中,证明了该流动具有相似性.应用有限分析法给出了速度、雷诺切应力、湍动能及其耗散率的相似函数,以及其最大值沿主流向的变化规律、掺入速度、速度半宽扩展率、涡粘系数、混合长度和湍动能及其耗散率的平衡图,与试验资料吻合良好.
A mathematical model for radial jets is establised based on k-s turbu lence model.It is proved that there are similarities in radial jets under the conditions of homogeneous circumstance.FAM is used to obtain the similarity functions of velocity,Reynolds stress,turbulent kinetic energy and its dissipation rate,the variations of their maximum value along the direction of main flow,the entrainment velocity,the spread rate of jet half width,virtual kinematic viscosity and mixing length.The energy balance is given also.The agreement between the calculated and experimental data is good
出处
《水利学报》
EI
CSCD
北大核心
1992年第9期50-58,共9页
Journal of Hydraulic Engineering
基金
水利水电基金
