截面涡结构的描述方法及其在叶栅流场中的应用

Description of vortex structure and it's application in cascade

基于微分方程定性分析理论 ,并通过对与涡轴垂直和斜交截面上旋涡结构关联式的研究 ,给出了在与涡轴斜交的截面上描述旋涡速度矢量的原则 .遵循此原则 ,可保证在与涡轴斜交的截面上 ,所得到的旋涡与流场中实际旋涡在涡结构与旋涡存在性两方面的一致性 .将直角坐标系下截面涡结构的判别准则 ,发展为适合描述叶轮机内部旋涡结构的任意曲线坐标系下的截面涡结构 .

The principle of describing the sectional vortex structure oblique to the vortex axis was described using the differential equation theory to study the relationship between vortex structures normal and oblique to the vortex axis. Following this principle it's can be guaranteed that structure and existence of vortexes on section oblique to vortex axis are identical to those of actual vortexes in the flow field. The evolution of passage vortex structure was studied with high order N-S solver.