Axial flow impeller shapes: part 1

摘要

The increasing importance of low head applications necessitates a study of the different axial flow pump impellers used for both pump and turbine operations. In this first of two articles, Punit Singh and Franz Nestmann of Karlsruhe Institute of Technology survey the available impeller shapes and present a theoretical model that reveals the behaviour of the impellers' internal hydraulic variables. Low head applications of turbomachinery (both pumps and turbines) are gaining increasing importance in modern day engineering. This is particularly true for turbine operation for energy recovery and decentralized power applications. While the requirements for pumping have been handled well by the industry, by comparison the technology for low head turbine applications has not yet been optimized.