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Influence of Impeller and Diffuser Characteristics and Matching
Transonic Flow Problems in Centrifugal Compressors Alfred F Stahler
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11 impeller 2wsin acceleration adiabatic aerodynamic aerodynamic design airflow rate airfoil blade loading distribution boundary layer camber cascade centrifugal compressor centrifugal stage characteristics component compressor map compressor performance configuration Design blade loading diameter dn dn effect engine flow coefficients flow function flow range flow rate frontal area fuser gas turbine gasifier GTC85-20 first stage guide vanes high pressure ratio impeller and diffuser impeller discharge impeller tip speed increased inducer blades inlet flow inlet Mach number intake loss matching maximum meridional mild surge mixed-flow impeller NACA obtained operating line optimum outlet overall pressure ratio peller pickup polytropic pressor radial compressor radial diffuser reduced region rotational speed rotor shadowgraph shock shown in Fig shows shroud static pressure stator streamline subsonic supersonic surface surge line tanf temperature throat area tion total pressure transonic stages vaned diffuser vaneless diffuser vaneless space velocity distribution wmdt