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首页> 外文会议>Congress of the International Association for Hydraulics Research;Biennial congress of the International Association for Hydraulics Research >IMPROVED OPERATING CHARACTERISTIC OF RADIAL TURBOMACHINES BY ADDING SECONDARY FLOW AT IMPELLER ENTRANCE DIAMETER
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IMPROVED OPERATING CHARACTERISTIC OF RADIAL TURBOMACHINES BY ADDING SECONDARY FLOW AT IMPELLER ENTRANCE DIAMETER

机译：通过在叶轮入口直径处增加二次流来改善径向涡轮机的工作特性

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This paper gives the experimental analysis results of added secondary flow influenceon the operating characteristics of the radial turbomachines. The secondary flow isadded at the impeller entrance through the guide system, which ends with the circleringat the impeller intake diameter nearby the impeller front shroud. The guide vanesare set in the circle-ring guide system in the direction of the intake pipe axis. Theyassure the axial symmetrical non-whirl secondary flow at the impeller intake. Theatmospheric, meaning non-force driven secondary flow loading is performed with thevolute guide system placed at the entrance of the circle-ring guide system. Based onthe presented experimental results, it can be concluded that the secondary flowfavourably influences on the operating characteristic of the radial impellers (13 < nq <35). The stable operating area increases in the direction of the small operatingcapacities (thus giving the possibility of wider pump regulation). At the same time theoverall efficiency is increased, especially in the area of the small, and under optimalcapacities.
机译：本文给出了附加的二次流对径向涡轮机运行特性影响的实验分析结果。二次流通过导向系统在叶轮入口处添加，并以圆环结束，位于叶轮前罩附近的叶轮入口直径处。导向叶片沿进气管轴线方向设置在圆环导向系统中。它们确保了叶轮入口处的轴向对称的非涡动二次流。大气，即无力驱动的二次流加载是通过将蜗壳引导系统放置在圆环引导系统的入口处进行的。根据给出的实验结果，可以得出结论，二次流有利地影响了径向叶轮的工作特性（13

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