Influence of additional inlet flow on the prerotation and performance of centrifugal impellers
Influence of additional inlet flow on the prerotation and performance of centrifugal impellers
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DOI：
10.1080/00221680309499962
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发表时间：
2003-03
影响因子：
2.3
通讯作者：
A. Predin;I. Biluš
中科院分区：
文献类型：
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作者：
A. Predin;I. Biluš
本文给出了在径向叶轮入口处加入附加流动对其影响的实验分析结果。分析了操作流动和预旋流特性。被测试的实验系统被安排使用空气操作。附加增流系统(AFAS)通过导流系统放置在叶轮的入口处，该导流系统由进口螺旋蜗壳、环形导流管(放置导叶的地方)和AFAS末端的环状空腔组成。环形凹陷放置在叶轮叶片入口边缘的护罩附近。AFAS中的导叶沿轴向放置，使所添加的流动不存在旋流成分。测试了AFAS的工作状态，其中AFAS由大气压(非强制加载)下的气流填充。对运行特性有明显的良好影响。扩大了稳定运行范围，降低了运行噪声。达到了叶轮扬程，提高了整体效率。
In this paper we present the results of our experimental analysis regarding the influence of additional flow when added at the radial impeller entrance eye. This analysis was done on both operating and prerotation flow characteristics. The experimental system tested was arranged to operate using air. The additional flow adding system (AFAS) was placed at the entrance eye of the impeller through the guide system, which consists of the spiral volute at the entrance, ring guide pipe (where the guide vanes are placed), and a ring - like hollow at the end of the AFAS. The ring - like hollow was placed near the shroud at the entrance edge of the impeller blades. The guide vanes in the AFAS were placed in the axial direction, so that the added flow had no swirl component. The operating regime was tested, whereby the AFAS was filled by the flow under atmospheric pressure (non-forced loading). A good influence was evident on the operating characteristic. The stable operating range was enlarged and the operating noise decreased. The achieved impeller head and the overall efficiency increased.