Effect of Triaxial Stress on the Plastic Zone Distribution in Front of Crack Tip with Mixed Mode Loading

Research on the plastic zone near mixed mode ⅰ-ⅱ crack tip with photoplasticity

用光塑性方法研究Ⅰ-Ⅱ复合型裂纹尖塑性区

Deformation Analysis in the Vicinity of a Growing Crack Tip with Finite Element Method

扩展裂纹端变形的有限元分析

Determination of thermal stress field near central crack tip with Hilbert problem mixing method

用Hilbert问题混合法确定中心裂纹尖端附近热应力场

Methods for determining bearing capacity of pile tip with plate loading test

平板载荷试验确定桩端承载力的方法

The experiments show that the tip leakage vortex in situation No. 3 forms earlier and the leakage mass flow rate is larger than in situations No. 1 and No.

实验表明：工况3比2,1叶尖间隙泄漏涡生成得早且间隙泄漏流量较大；

The tip leakage vortex is the main reason which causes tip gap leakage flow blockage and the turbulent flow in the blade tip gap of compressor.

叶尖泄漏涡是叶尖间隙气流流动阻塞和引起压气机转子尖部紊流脉动的主要因素。

The velocity vector and vortical contour in three different circumference positions were successfully acquired and the structure of the tip leakage vortex was clearly illustrated.

测量得到了三个不同周向位置下的涡量图和速度矢量图，并观测到了叶顶泄漏涡的涡旋结构。

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。

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。

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。

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。

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。

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。

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。

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；

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。

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。

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。

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。

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。