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用三维激光多普勒测速系统测量研究了一个离心压气机转子近端壁区三维紊流流场。结果表明 ,整个叶片通道内叶背角区存在角涡及其伴随涡 ,叶盆角区存在前缘马蹄涡的叶盆分支 ,它们的发展、演化较大地影响着附近区域的流动 ,是造成了所在区域流动阻塞和气流脉动的主要因素。前缘马蹄涡叶背分支沿下游逐渐向叶盆方向发展 ,与端壁附面层和主流的进一步掺混 ,并在约 1 /2叶片通道处的叶盆角区与前缘马蹄涡的叶盆分支发生交混 ,在下游造成一定强度的流动阻塞和紊流脉动带。测量区域内 ,轴向、切向紊流强度分布规律相近 ,3个方向的紊流强度 ,切向水平最高 ,径向水平最低
A three-dimensional laser Doppler velocimetry system was used to measure and measure the three-dimensional turbulent flow field in the proximal wall of a centrifugal compressor rotor. The results show that there are angle vortices and their accompanying vortices in the dorsal angle region of the leaf blade passage, and the leafpot branches of the leading edge horseshoe vortex exist in the angle region of the leaf vane. Their development and evolution greatly affect the flow in the vicinity, resulting in The main factors of flow blockage and airstream in the area. The dorsal branches of the leading horseshoe vortex evolve gradually toward the leaf pots downstream, and are further blended with the lamina and mainstream of the end wall. The leaf corner and the leaf of the leading horseshoe vortex at about 1/2 of the leaf channels The swollen branches of the pots cause a certain degree of flow blockage and turbulent pulsation bands downstream. In the measurement area, the distribution of axial and tangential turbulence intensity is similar, and the turbulence intensity, the tangential level and the radial level are the lowest in the three directions