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Abstract:
A transonic
centrifugal compressor with wedge diffuser is designed using centrifugal
compressor computer-aided integrated design system. The internal flow
fields of impeller and wedge diffuser are calculated by solving
three-dimensional Navier-Stokes equation method and mixed plane method.
Calculating results illustrated that as the mass flow is at 2.45 kg/s,
stage pressure ratio is 6.22, stage total to total efficiency is 75%.
General secondary flow vortex structure is exhibited in impeller
channel. Shock wave exist at leading edge of wedge diffuser. It was
found the complex secondary flow vortex structure is formed in wedge
diffuser. Secondary flow vorticex in wedge diffuser form firstly, then
develop, finally diminish.
Key words:
Transonic
Centrifugal compressor Wedge diffuser Three-dimensional Navier-Stokes
calculation
CLC No: V232.41
部级预研基金资助项目(40402020102). Received 20050328,
received in revised form 20050824 |