A computational study on optimum inducer leading geometry for stall suppression in a centrifugal blower

Zixianq Sun, Masahiro Ishida, Chikamune Masuzawa

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The 3-D turbulent flow simulation was conducted at small flow rates near the inducer stall limit of a centrifugal blower. The hub-to-shroud blade-leading geometry of the impeller was varied in three kinds without changing the axial position and the blade angle of the blade-leading tip. The basic concept for suppression of the inducer stall in the present investigation is to suppress the separation bubble formed at the blade-leading by means of the inlet recirculation. The computational results show that, in the case of flow separation occurring on the blade suction surface at the hub side blade-leading, air injection normal to the suction pipe wall upstream of the blade-leading tip is effective to decrease the flow incidence and to suppress the separation bubble, while in the case of separation occurring at the blade-leading tip region, wall jet with a strong angular momentum in the direction of impeller rotation is required for suppression of the shroud side blade-leading separation.

Original languageEnglish
Pages (from-to)515-522
Number of pages8
JournalAmerican Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
Volume253
Publication statusPublished - 2000
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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