Aerodynamic character of partial squealer tip arrangements in an axial flow turbine. Part I: Detailed aerodynamic field modifications via three dimensional viscous flow simulations around baseline tip

Levent Kavurmacioglu, Debashis Dey, Cengiz Camci

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

This paper deals with the viscous flow simulations of the complex tip leakage flow in Axial Flow Turbine Research Facility (AFTRF). Special attention is paid to the 3D structure of the tip leakage flow mechanisms in a baseline tip configuration with no desensitisation. Although past experimental studies provide much insight into the physical understanding of the tip region aerodynamics, there are still many areas of the flow-field in which experiments are extremely difficult to perform. Fine details of the entrance flow near the pressure side where the tip leakage jet starts to form, the leakage jet formation between the tip surface and outer casing, the re-circulatory flow zone very near the pressure side corner, the interaction area of the tip vortex with the conventional passage flow, the influence of the relative motion of the outer casing and leakage flow reversal can be visualised with excellent resolution. After the presentation of the measured inlet boundary conditions and a grid independency study, the baseline tip flow simulations are discussed in detail.

Original languageEnglish (US)
Pages (from-to)363-373
Number of pages11
JournalProgress in Computational Fluid Dynamics
Volume7
Issue number7
DOIs
StatePublished - Oct 23 2007

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axial flow turbines
Axial flow
Flow simulation
viscous flow
Viscous flow
aerodynamics
Aerodynamics
Turbines
leakage
Flow fields
Vortex flow
simulation
Boundary conditions
casing
Experiments
research facilities
entrances
flow distribution
grids

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Computer Science Applications

Cite this

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