vortex surface

The results obtained describe the flow structure in the corner between the end-wall and blade suction surface in detail. Besides a passage vortex with in the passage, there exist a shed corner vortex pair and a secondary vortex pair in the corner.

结果表明：叶栅通道内不仅存在通道涡，而且在吸力面与端壁形成的角区内存在一角区脱落涡对和一二次涡对。

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The results showed that, the tip vortex at the blade's leading edge near the suction surface tip region is generated by the rolling up effects between the main flow fluid along the meridian surface and the outer fluid of the blade's outer region.

结果表明：沿子午面流动的主气流与从叶顶外侧吸入的气流之间的卷吸作用导致在吸力面叶顶区域产生了叶尖涡。

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From the photos of flow visualization it can be seen that corner vortex is generated and developed near the suction surface of blade/ endwall junction, and forms a triangle region on the suction surface.

从流场显示图片可以观测叶片吸力面靠近端壁的角涡形成与发展，以及吸力面上的三角形区域；

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Regarding structure under wind load function crosswind upward power response, because comes the wind to receive running free to the wall surface impediment, has the vortex tattered and wind direction change, with the running free wind cutting hit, the wind power become further complex.

对于结构在风荷载作用下横风向上的动力响应，由于来风受到顺风向壁面的阻挡，发生漩涡破碎和风向改变，与顺风发生剪切撞击使得风力结构进一步复杂。

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The photos of flow visualization show that corner vortex generates and develops near the suction surface of blade/ endwall junction, which forms a triangle region.

流场显示图片表明：叶片吸力面靠近端壁有角涡形成与发展，并存在一个三角形区域；

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According to distribution of pressure of blade surface at different time of outdoor units, it is shown that interaction between tip vortex and bellmouth is the major factor of unsteady fluctuation of blade surface and has large effect on discrete frequency noise of outdoor units.

室外机不同时刻叶片表面压力分布表明，叶尖涡与导风罩干涉是室外机中叶片表面非定常力脉动的主要原因，影响室外机离散频率噪声。

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