A design concept of two-phase flow centrifugal impeller is described with experimental results. The short bladed forward impeller with high outlet blade angle is recommended to keep theoretical head higher even in two-phase flow condition and to disperse the air accumulating region on the suction blade surface by the water jet flow coming along the pressure blade surface. Furthermore, tandem arrangement of outer and inner rotating cascades with the same blade numbers was adopted to suppress the rotating stall phenomena appearing in the case of a single stage of outer cascade. Then how to evaluate the impossibility of pumping due to two-phase flow is shown from a relation between the two-phase flow head characteristic curve and the resistance curve of piping system.
|Number of pages||7|
|Journal||Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B|
|Publication status||Published - Jan 2005|
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanical Engineering