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A Novel Vortex Identification Technique Applied to the 3D Flow Field of a High-Pressure Turbine

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F19%3A00340422" target="_blank" >RIV/68407700:21220/19:00340422 - isvavai.cz</a>

  • Result on the web

    <a href="https://doi.org/10.1115/GT2019-90462" target="_blank" >https://doi.org/10.1115/GT2019-90462</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1115/GT2019-90462" target="_blank" >10.1115/GT2019-90462</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    A Novel Vortex Identification Technique Applied to the 3D Flow Field of a High-Pressure Turbine

  • Original language description

    The efficiency of modern axial turbomachinery is strongly driven by the secondary flows within the vane or blade passages. The secondary flows are characterized by a complex pattern of vortical structures that origin, interact and dissipate along the turbine gas path. The endwall flows are responsible for the generation of a significant part of the overall turbine loss because of the dissipation of secondary kinetic energy and mixing-out of non-uniform momentum flows. The understanding and analysis of secondary flows requires a reliable vortex identification technique to predict and analyse the impact of specific turbine designs on the turbine performance. However, literature shows a remarkable lack of general methods to detect vortices and to determine the location of their cores and to quantify their strength. This paper presents a novel technique for the identification of vortical structures in a general 3D flow field, based on a triple decomposition of motion proposed by Kolář. The present method allows to locate automatically the core of each vortex, quantify its strength and determine the vortex bounding surface. The output may be used to visualize the turbine vortical structures for the purpose of interpreting the complex three-dimensional viscous flow field, as well as to highlight any case-to-case variations by quantifying the vortex strength and location. The vortex identification method is applied to a high-pressure turbine with three optimized blade tip geometries. The 3D flowfield is obtained by CFD computations performed with Numeca FINE/Open. The computational model uses steady-state RANS equations closed by the Spalart-Allmaras turbulence model. Although developed for turbomachinery applications, the vortex identification method proposed in this work is of general applicability to any three-dimensional flow-field.

  • Czech name

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

  • OECD FORD branch

    20304 - Aerospace engineering

Result continuities

  • Project

    <a href="/en/project/EF16_019%2F0000826" target="_blank" >EF16_019/0000826: Center of Advanced Aerospace Technology</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2019

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Article name in the collection

    Proceedings of ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition

  • ISBN

    978-0-7918-5856-1

  • ISSN

  • e-ISSN

  • Number of pages

    18

  • Pages from-to

  • Publisher name

    American Society of Mechanical Engineers - ASME

  • Place of publication

    New York

  • Event location

    Phoenix, Arizona

  • Event date

    Jun 17, 2019

  • Type of event by nationality

    WRD - Celosvětová akce

  • UT code for WoS article

    000501628000009