Flow Analysis of Characteristics of a Centrifugal Impeller in Bubbled Water by Field Singularity Method

Hideya Nishiyama, Atushi Haseyama, Yoshio Takahashi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A flow analysis of the characteristics of a centrifugal impeller of arbitrary shape in bubbled water is presented by the field singularity method. The method, combined with the iteration scheme, is an extension of an incompressible flow method in pure water using an exact relation between source strength and local density. The compressible effects of small and homogeneous dispersed air bubbles in water on the flow characteristics of a centrifugal impeller are shown through some concrete numerical examples. The flow features such as the distributions of static pressure, local air volume ratio and local Mach number on the impeller and in the impeller passage are clarified for inlet stagnation air volume ratios and pressures at off-design conditions. Finally, the present calculated results for the static pressure distribution and pump head degradation are favorably compared with the available experimental data.

Original languageEnglish
Pages (from-to)3427-3433
Number of pages7
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume55
Issue number519
DOIs
Publication statusPublished - 1989

Keywords

  • Air Volume Ratio
  • Bubbled Water
  • Centrifugal Impeller
  • Compressible Effect
  • Flow Characteristics
  • Head Degradation
  • Singularity Method
  • Tip Mach Number

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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