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TECHNICAL PAPERS

Numerical and Experimental Study of Unsteady Flow Field and Vibration in Radial Inflow Turbines

[+] Author and Article Information
T. Kreuz-Ihli, D. Filsinger, A. Schulz, S. Wittig

Lehrstuhl und Institut für Thermische Strömungsmaschinen, Universität Karlsruhe (TH), Kaiserstraße 12, 76128 Karlsruhe, Germany

J. Turbomach 122(2), 247-254 (Feb 01, 1999) (8 pages) doi:10.1115/1.555441 History: Received February 01, 1999
Copyright © 2000 by ASME
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References

Figures

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Turbine rotor of the MTU ZR140
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Schematic of the measuring positions
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Measuring window in the turbine scroll
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Schematic of turbine instrumentation
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Position 3, x/b=0.2, circumferential velocity (m/s)
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Position 3, x/b=0.8, circumferential velocity (m/s)
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Position 3, x/b=0.2, axial velocity (m/s)
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Position 3, x/b=0.8, axial velocity (m/s)
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Position 1, circumferential velocity, x/b=0.5,y/r=0
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Position 1, circumferential velocity, x/b=0.5,y/r=0.38
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Position 3, circumferential velocity, impeller, x/b=0.2
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Position 3, circumferential velocity, impeller, x/b=0.8
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Position 3, axial velocity, impeller, x/b=0.2
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Position 3, axial velocity, impeller, x/b=0.8
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Numerical model of the radial inflow turbine
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Position 3, calculated axial velocity
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Position 3, measured axial velocity
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Static pressure in the turbine (cross section)
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Turbine Mach number (cross section)
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Pressure distribution on a turbine blade at different positions in the turbine scroll
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Pressure difference (pressure-suction side) at three locations on the leading edge versus blade position in the turbine scroll
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Finite element models for the modal analysis; left: rotor segment; right: full rotor
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Deformation plots of the first two modes at 10,005 Hz mode 1 (left) and 16,278 Hz mode 2 (right) for the single blade
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Calculated rotor eigenmodes, blades oscillate in mode 1
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Diametric modes; left: one nodal diameter; right: three nodal diameters

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