The vertical vortex frequently occurs at hydraulic intakes such as diversion pipeline, diversion tunnel, spillway and pumping station.
立轴旋涡在水电站引水管道、导流隧洞、溢洪道、水泵站等进水口前时有发生。
A combination approach of physical and numerical models is adopted to study the hydraulic characteristics of the vertical vortex under the condition of the side orifice.
采用模型试验和数值模拟相结合的方法对侧部孔口情况下立轴旋涡的水力特性进行了研究。
Taking the advantage of numerical simulation that can simulate the different types of boundary conditions, the vertical vortex induced by the asymmetric initial flow is simulated too.
运用数值模拟具有能模拟各种不同边界条件的优势，还对非对称来流条件下形成的立轴旋涡进行了模拟。
The flow field characteristics of vertical vortex with multi-circle spiral flow at hydraulic intakes are described by numerical simulation, experimental investigation, and theoretical equations.
为描述进水口前立轴旋涡多圈螺旋的流场特性，运用数值模拟、试验研究和理论公式3种方法。
The evolution of vertical helicity has a better forecast instruction significance to the southwest vortex rainstorm.
垂直螺旋度的演变对本次西南涡暴雨有较好预报指示意义。
Third, the MCV, the low tropospheric trough (vortex), and the hot towers conduct together the vertical uniformization between the lower and middle tropospheric systems through their interaction.
第三，中层MCV与对流层低层的槽(涡旋)以及对流热塔之间通过相互作用，共同实现中低层系统的垂直耦合。
This paper focuses on the study of heat transfer enhancement in the nature convection in the vertical plat by using delta-winglet longitudinal vortex generators arranged in rows.
对多排纵向涡发生器对竖直平板自然对流的强化效果进行了研究。
The vortex in Doppler velocity field, Echo tops, Vertical integrated liquid, lift stream and cold advection are significant in this rainfall case.
多普勒速度场、回波顶高、垂直液态含水量、对应的上升气流以及温度平流对这次降水具有预报指示意义。
When waves act on a vertical cylinder, there are in-line and lift forces. They are caused by the viscous effect, which induces the surface frictional force and flow separation and vortex shedding.
通常将垂直柱体在波浪场中的受力分为正向力(顺流力)与升力，它们是由干粘性流绕钝体产生的摩擦阻力和由于水流绕柱分离产生涡漩而形成柱表面压力分布的不均匀变化而造成的。
Besides the mainstream, there are still some secondary flow phenomena, such as short-circuit flow, vertical eddy and eccentric circulation vortex.
旋风除尘器内除主流外还存在着二次流现象，主要有短路流、纵向涡流、偏心环流等。
Experiments were performed in horizontal and vertical conduits with diameter of 50 mm respectively, adopting air and water as flow media and a triangular prism as the vortex-forming body.
以空气和水为介质，以三角柱为旋涡发生体，在内径为50mm的水平管和垂直上升管中分别进行实验，分析雷诺数和体积含气率对气液两相流涡街稳定性的影响。
Experiments were performed in horizontal and vertical conduits with diameter of 50 mm respectively, adopting air and water as flow media and a triangular prism as the vortex-forming body.
以空气和水为介质，以三角柱为旋涡发生体，在内径为50mm的水平管和垂直上升管中分别进行实验，分析雷诺数和体积含气率对气液两相流涡街稳定性的影响。
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