Optimization of Wrap Angle in the Mixed Flow Impeller for Reducing Flow Losses
Publish place: Journal of Applied Fluid Mechanics، Vol: 13، Issue: 6
Publish Year: 1399
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JAFM-13-6_023
تاریخ نمایه سازی: 15 دی 1400
Abstract:
In this paper, mixed flow impeller is investigated to reduce the secondary flow loss and attain uniform flow at impeller exit by changing the wrap angle in the trailing edge (called as stacking condition). The ۳D inverse design methodology is adopted for the blade profile generation using ADT Turbo suite software. The internal flow analysis of the base design is evaluated using commercial computational fluid dynamics (CFD). A single stage proto type model is tested and the experimental results have strong agreement with numerical analysis results. Further the impeller is designed with different wrap angle at the trailing edge of the hub and shroud region. The pump performance curve is obtained from numerical analysis for the optimized impellers from the ADT Turbo suite and compared with the base design. The wrap angle between ۸ ̊ - ۱۵̊ degree in hub region has the less secondary flow losses compared to the stacking in the shroud region. Higher wrap angle above ۱۷ ̊ degree increases the diffusion ratio which in turn induces non-uniform flow at the impeller exit and also increases instability.
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Authors
T. Prabu
PSG College of Technology, Coimbatore, Tamil Nadu, ۶۴۱۰۰۴, India
P. Viswanathan
PSG College of Technology, Coimbatore, Tamil Nadu, ۶۴۱۰۰۴, India
N. Gokul Kannan
PSG College of Technology, Coimbatore, Tamil Nadu, ۶۴۱۰۰۴, India
R. Rudramoorthy
PSG College of Technology, Coimbatore, Tamil Nadu, ۶۴۱۰۰۴, India
A. Firthouse
PSG College of Technology, Coimbatore, Tamil Nadu, ۶۴۱۰۰۴, India