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Abstract: Usually
chemical axial pump doesn’t mount diffusion vane because the distance
between impeller and elbow is too short. But this manner would waste
energy greatly because the kinetic energy associated with circular
velocity at impeller outlet will dissipate gradually in flow passage. In
order to increase the unit efficiency, computational fluid dynamics
method is adopted to explore the internal flow characteristics for
different diffusion vane assemblies. The mechanics is studied, which can
explain why hydraulic performance becomes deteriorative when the normal
diffusion vane is installed in chemical axial pump. Numerical simulation
results indicate that the non-uniform diffusion vane assembly can
optimize the unit hydraulic performance effectively.
Key words: Axial
pump Non-uniform diffusion vane CFD Numerical simulation
CLC No: TH312
国家自然科学基金重大研究计划资助项目(90210011).
Received
20051113, received in revised form 20060315
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