摘要
结合平面螺旋流模型,通过简化N-S方程,分析了立轴旋涡运动的数学模型,并描绘了立轴旋涡的空间形态.研究了立轴旋涡运动状态的影响因素,特别是衡量主轴旋涡涡旋强度重要指标之一的速度环量.此外,结合立轴旋涡产生的条件,分析了进水口的设计原则.对于现有工程中存在的立轴旋涡,提出了运用防涡梁或垂直消涡格栅等结构物消除旋涡的方法.
According to Navier-Stokes equations, a mathematical model about the particle's movement at vertical vortex was studied. By this model, the three-dimensional shape of vertical vortex was derived, which was more reasonable than that of the circulating flowing model and closer to vertical vortex in real conditions. What's more, parameters such as circulation at the hydraulic intakes was analysed. Through the mathematical model, the circulation was regarded as the most important dictator to the degree of vertical vortex. According to the conditions of generating vortex, the rules of designing intakes are put forward. To the vortex in current projects, applying girders and vertical lattice could counteract generating vertical vortex.
出处
《西南民族学院学报（自然科学版）》
CAS
2002年第4期479-482,共4页
Journal of Southwest Nationalities College(Natural Science Edition)
