第二部分对叶顶间隙泄漏流动和叶尖涡进行了研究分析。
The second part studies and analyzes the tip leakage flow and tip vortex.
结果表明：叶顶间隙气流与主流发生卷吸而生成泄漏涡。
The results showed that the main flow rolled up the leakage flow of the tip clearance and generated the tip leakage vortex.
利用有限元分析软件分析了某型高压涡轮叶顶间隙在不同工况下随时间的变化。
The high pressure turbine tip clearance variation versus time under different operating conditions were analyzed by the finite element method.
渐缩型间隙在叶片前半轴弦受到上通道涡的抑制，减少了叶顶间隙泄漏涡的强度和范围；
Suppressed by the up passage vortex at upstream side of blade, the intensity and scale of the tip clearance leakage vortex is decreased.
利用数值方法研究了某低速轴流孤立压气机转子中非定常叶顶间隙流的流动特征和频率特性。
Numerical methods were utilized to investigate the time-dependent flow patterns and the frequency characteristics of unsteady tip clearance flow in an axial-flow low-speed isolated compressor rotor.
近年来，人们发现压气机叶顶间隙流并非始终处于定常状态，在某些流动条件下，它会产生明显的非定常波动，并影响压气机的总性能。
Recently, the unsteady characteristics of tip clearance flow, which appears in some flow conditions, was discovered and its influence to the compressor performance was recognized.
本文对某亚音轴流压气机的中间三排叶片进行定常与非定常数值模拟，分析在不同的动叶叶顶间隙和静叶气封间隙组合下压气机的流动特性。
One and a half stages of a subsonic compressor were simulated with steady and unsteady calculation, comparing the performance with different combination of tip leakage and seal cavity.
对于不同大小的间隙及环壁静止与旋转的不同壁面条件，揭示了叶顶区流动的细节。
The details of the flow in tip region were predicted under different clearance scale and the condition of both stationary and rotating hub.
对于不同大小的间隙及环壁静止与旋转的不同壁面条件，揭示了叶顶区流动的细节。
The details of the flow in tip region were predicted under different clearance scale and the condition of both stationary and rotating hub.
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