TY - JOUR
T1 - A computational study on optimum inducer leading geometry for stall suppression in a centrifugal blower
AU - Sun, Zixianq
AU - Ishida, Masahiro
AU - Masuzawa, Chikamune
PY - 2000
Y1 - 2000
N2 - 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.
AB - 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.
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M3 - Article
AN - SCOPUS:33745240112
VL - 253
SP - 515
EP - 522
JO - American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
JF - American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
SN - 0888-8116
ER -