Experimental and numerical investigations of the three-dimensional boundary layer flow in radial impellers with tandem blades

串联叶片径向叶轮三维边界层流动的实验和数值研究

• 批准号: 416098161
• 负责人: Professor Dr.-Ing. Martin Böhle
• 金额: --
• 依托单位: Lehrstuhl für Strömungsmechanik und Strömungsmaschinen (SAM)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/416098161?language=en
• 关键词: Experimental; numerical; investigations; three; dimensional

By the application of tandem blades the pressure increase of the flow is split on two blades. The blade arranged in the rear part of the tandem blade has thin, "sane" boundary layers in the leading edge region. Therefore the remaining pressure increase in flow direction is realized with approximately fresh boundary layers in the leading edge region.The question arises whether the principal of tandem blades can also be applied for radial impeller pumps in such a way that an improvement of head, efficiency and/or the NPSH-behavior can be reached. The knowledge in the open literature about this for radial impeller pumps is small in comparison with the literature about axial tandem blades. Therefore tandem blades are a research topic for radial impeller pumps.

通过应用串联叶片，流量的压力增加被分配到两个叶片上。布置在串列叶片的后部的叶片在前缘区域中具有薄的、“健全的”边界层。因此，在流动方向上的剩余压力增加是通过在前缘区域中的近似新鲜的边界层来实现的。问题是，串联叶片的原理是否也可以应用于径向叶轮泵，从而可以达到压头、效率和/或NPSH性能的改善。与关于轴向串联叶片的文献相比，关于径向叶轮泵的公开文献中的知识很少。因此，串联叶片是径向叶轮泵的一个研究课题。