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1.
  • Hildebrandt, Andre, et al. (författare)
  • Numerical investigation of the effect of different back sweep angle and exducer width on the impeller outlet flow pattern of a centrifugal compressor with vaneless diffuser
  • 2006
  • Ingår i: Proceedings of the ASME Turbo Expo. - 079184241X ; 6 PART B, s. 1077-1086
  • Konferensbidrag (refereegranskat)abstract
    • This paper presents a numerical investigation of the effect of different back sweep angles and exducer widths on the steady-state impeller outlet flow pattern of a centrifugal compressor with a vaneless diffuser. The investigations have been performed with commercial CFD and in-house programmed 1-D codes. CFD calculations aim to investigate how flow pattern from the impeller is quantitatively influenced by compressor geometry parameters; thereby, the location of wake and its magnitude (flow angle and relative velocity magnitude) are analyzed. Results show that the increased back sweep impeller provides a more uniform flow pattern in terms of velocity and flow deviation angle distribution, and offers better potential for the diffusion process inside a vaneless (or vaned) diffuser. Secondary flux fraction and flow deviation angle from CFD simulation arc implemented into the 1-D two-zone program to improve 1-D prediction results. Copyright
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2.
  • Szász, Robert-Zoltán, et al. (författare)
  • Computation of the acoustic field in an annular gas turbine combustion chamber using a hybrid approach
  • 2006
  • Ingår i: Proceedings of the ASME Turbo Expo. - : ASME. ; 6 PART B, s. 1615-1624, s. 363-370, s. 1615-1624
  • Konferensbidrag (refereegranskat)abstract
    • The acoustic field generated by flow unsteadiness in a model annular gas turbine (GT) combustion chamber is determined using a hybrid approach. In the flow solver the semi-compressible Navier-Stokes equations are resolved using LES as turbulence model. The acoustic solver is based on an inhomogeneous wave equation, where the instantaneous source terms are computed from the LES data in each time-instant. The flow and the acoustics in a GT combustor with co- and counter-rotating swirler burners have been considered. The results have shown that significant differences can be observed between the co- and counter-rotating configurations both in the flow and acoustic fields. Copyright
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  • Resultat 1-2 av 2
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Fuchs, Laszlo (1)
Genrup, Magnus (1)
Szász, Robert-Zoltán (1)
Mihaescu, Mihai (1)
Duwig, Christophe (1)
Hildebrandt, Andre (1)
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2006 (2)

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