轴向旋涡流是离心叶轮内特殊的流动现象，它的速度分布规律与叶轮特性关系密切。
Relative eddy is a special flow phenomenon, occurring within centrifugal impeller passage. Its speed distribution is closely related to impeller characteristics.
通过摄像法得出了旋涡表面流体质点的运动轨迹、切向和轴向时均速度。
Moving path lines, tangential and axial average velocities of particles at the vortex surface are obtained by the photography method.
建立了二维浅水流动的旋涡诱导速度公式，在已知旋涡场和胀量场时，由该表达式可确定流动速度场。
A formula is deduced for the velocity induced by the vortices in two-dimensional shallow water flows and it is used to correct the Biot-Savart law.
导出了二维浅水流动的涡动方程与速度环量的随体导数表达式，以此为基础，分析了二维浅水流动中旋涡的动力学性质；
The vorticity equation was first established and the characteristics of vortex motion in two-dimensional shallow-water flows was analyzed, and then discrete vortex method (DVM) was briefly described.
这种新工艺的关键技术是如何形成旋涡气流及研究气流速度和压力对加工效果的影响关系。
The key of the new technology is how to generate the swirling airflow. And we must study the influences of the speed and pressure of the airflow on the processing effects.
旋进旋涡流量计是一种新型的速度式流量计，已广泛应用于工业现场中的气体、蒸汽的流量测量。
Swirlmeter is a new kind of velocity flow meter which has been widely used in industry for gas and stream flow measurement.
旋进旋涡流量计是一种新型的速度式流量计，已广泛应用于工业现场中的气体、蒸汽的流量测量。
Swirlmeter is a new kind of velocity flow meter which has been widely used in industry for gas and stream flow measurement.
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