tip vortex

The analytical method for predicting the hovering rotor wake is described to investigate the motion of the helical tip vortex.

用文中描述的尾流分析方法研究了螺旋尖涡的运动。

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In partly-ducted axial flow fan system with bellmouth, blade tip vortex formed at blade leading edge is generated by pressure gradient between suction side and pressure side, it develops downstream and into flow passages as blades rotate.

含导风罩的部分管道式轴流风扇系统，在叶轮前缘由于吸力面和压力面压差产生叶尖涡，随叶轮旋转往下游和流道内部发展。

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The tip leakage vortex may have greater effect than other vortexes, that is consistent with the experimental results.

不同二次流与叶片颤振的相关性中尖部漏流涡对叶片气弹稳定性的影响较大。

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Research on rotor tip vortex model and the method for determining its parameter

旋翼桨尖涡模型及其参数确定方法研究

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When axial flow fan is included in outdoor units, blade tip vortex further develops mid span at meridional plane.

当轴流风扇置于室外机内部时，叶尖涡在子午面上的轨迹愈发向中部叶高方向发展。

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The numerical results indicate that the process of the tip vortex formation is delayed with the decreasing of the tip clearance. Its strength weakens rapidly.

结果表明，叶顶间隙的减小使间隙涡产生过程延缓，强度的衰减速度增大，作用范围减小；

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With help of experiment and CFD simulations, character of tip vortex and trailing edge vortex of partly-ducted axial flow fan is studied, with flow change in outdoor units also analyzed. 2.

实验结果结合三维CFD数值模拟研究了部分管道式轴流风扇系统叶尖涡、尾缘涡特征，及其在室外机内部的流动变化。

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Tip vortex goes downstream outward along the span direction, and the induced drag of the wing decreases.

翼尖涡沿着展向方向向外移动，机翼诱导阻力减小。

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In this paper an experimental investigation was carried out, and it is proved: no matter whether tip vortex cavitation is visible, narrow band noise peak is connected with the flow near the tip of propeller.

本文用实验证实这种窄带噪声峰与桨叶梢部流动有关，无论梢涡空泡可见与否，都可能出现。

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In comparison with these of the straight cascade the blade positively curving reduces the quantity of the critical points, eliminates the upper passage vortex, and transform the closed separated flow of the secondary vortex along the blade tip suction side into the open separated flow.

与直叶栅比较，叶片正弯明显减少了壁面与横截面流场中奇点的数量，消除了上通道涡，并使叶顶吸力边的二次涡分离流动由闭式分离转变为开式分离。

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The measurements of hovering blade tip vortex and rotor wake were conducted to investigate the blade tip vortex formation and evolution, and its relationship with the rotor test states.

为了详细研究悬停旋翼桨尖涡的形成与发展过程，以及旋翼状态参数与桨尖涡及其尾迹的关系，开展了桨尖涡及其尾迹的测量和研究。

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An analytical method for predicting rotor vortex wake in low speed and hovering flight is described to investigate the motion of the helical tip vortex.

以重点考察旋翼尖涡的运动为目标来构想一种悬停和前飞旋翼涡尾流的理论计算方法。

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Investigation of Tip Vortex in Compressor at Near Stall Condition

近失速状态下压气机转子叶尖旋涡流动研究

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This paper studied the velocity field of a forward swept axial-flow fan with no casing configuration by means of PIV technology, and a tip vortex phenomenon is observed.

本文利用对开式前缘弯掠轴流风扇进行PIV实验，捕捉到了开式轴流风扇的叶尖涡。

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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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The wake is mixing with the last rotor tip leakage vortex in the stator passage, leading to more substantial fluctuations in the flow field.

转子尾迹在静子通道内追赶上从前一转子叶片通道内下来的叶尖泄漏涡，二者的相互作用和掺混导致静子尖区更为复杂的二次流动。

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A model is developed for the calculation of the initial rotor tip vortex core radius aiming at eliminating the empirical parameters of the tip vortex in rotor free-vortex wake analysis.

建立了一个旋翼桨尖涡初始涡核半径计算模型，用于消除旋翼自由尾迹分析中桨尖涡涡核半径依靠经验设定的现状。

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Investigation of Tip Leakage Vortex in Compressor at Design Condition

设计状态下压气机转子叶尖泄漏涡流动研究

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The rotor tip leakage vortex has a stronger influence on the downstream endwall flow than the rotor wake.

同转子尾迹相比，转子叶尖泄漏涡对静子尖区的影响更为明显和深远。

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Influence of gas content on tip vortex cavitation inception

含气量对梢涡初生空化的影响

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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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An investigation made on the rotor blade tip vortex through use of a Three Dimensional Laser Doppler Velocimetry ( 3D LDV) is described.

利用三维多谱勒激光测速仪，对悬停状态下模型旋翼桨叶附近的流场进行了实验测量。

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The corner vortex contributes to the high turbulence level at the corner of the tip suction surface.

受角区旋涡发展的影响，后半个通道内叶尖吸力面角区在较大范围内紊流脉动强，剪切应力大。

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3D LDV measurements of rotor blade tip vortex in hover

利用三维激光测速方法研究悬停状态下的桨尖涡

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Then, complex three-dimensional turbulent flow field inside flow passage of partly-ducted axial flow fan are analyzed, characteristics of tip vortex with its formation, development, stretched and broken down by the interaction with bellmouth are discussed.

分析了部分管道式轴流风扇内部复杂三维湍流流场，特别是叶顶区域叶尖涡的形成、发展，及其与导风罩干涉后的拉伸和破裂现象。

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The prediction and scaling of tip vortex cavitation inception and its location is a very complicated problem.

梢涡的初生空化及其位置的判断是一个非常复杂的问题。

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3-D Turbulent Characteristics of the Tip Leakage Vortex inside an Axial Compressor Rotor Passage at a Low Mass-Flow Condition

轴流压气机小流量状态转子叶尖泄漏涡三维紊流特性

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Simulated flow inside impeller illustrates the tip clearance and corner vortex developing and mixing with main flow through passage.

对叶轮内流动模拟，说明了叶顶泄漏流对主流的作用，以及叶轮内部壁角涡的形成与发展。

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The Rankine vortex model is traditionally used for modelling tip vortex.

Rankine圆旋涡模型传统地被用来模化梢涡。

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The transportation of low energy fluid in the flow passage," jet/ wake" structure and the formation of tip leakage vortex are revealed.

揭示了流道中低速流体的输运，射流&尾迹流型和叶顶间隙泄漏涡等的形成过程。

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