vortex line

The head of the line catches the tail, and the chain spins into a vortex.

该捕食链的头捕捉尾巴，链到一个漩涡旋转。

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The vortex dissipation began at the position of 75% tip chord length, extended to the downstream of the rotor in a slant line contrary to the rotor's rotation direction, and disappeared at 65% tip chord length of the downstream of the rotor exit.

叶尖涡随后逐渐向压力面移动；叶尖涡从75%叶顶弦长位置至转子下游逐渐耗散，沿着一条与叶轮旋向相反的斜线向转子下游发展，大致持续到转子下游65%叶顶弦长位置。

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Comprehensive Analyses and Numerical Simulation for a Cold Vortex Squall Line over China Loess Plateau

黄土高原一次冷涡飑线的综合分析与数值模拟

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The heavy rainfall is dominated by a meso-scale warm shear line, having a closed relationship with a meso-scale system composed by meso-scale shear line, thunderstorm high and mesoscale vortex;

这次强降水与中尺度切变线、雷暴高压和中尺度气旋等中尺度系统关系密切，为一次中尺度暖式切变线暴雨过程；

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Compressing air expands in nozzle, and then enters into vortex tube in the tangent line direction.

工作时压缩气体在喷嘴内膨胀, 然后以很高的速度沿切线方向进入涡流管.

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