The Application of Fluidic Sealing in Shrouded Gas Turbine Blades

Filip Wasilczuk; Paweł Flaszyński; Piotr Doerffer; Krzysztof Marugi; Tomasz Borzęcki

doi:10.1115/1.4064045

The Application of Fluidic Sealing in Shrouded Gas Turbine Blades

Abstract

This paper presents a study conducted on a new gas turbine designed to limit leakage in the labyrinth seal. The slots in the fin are used to generate a bypass flow, which obstructs the flow in the gap above the fin. The method was tested numerically and experimentally beforehand using a simplified model without rotation or blade passages. In this paper, the validation of the method using a model of a turbine stage is shown. Reynolds-averaged Navier–Stokes simulations using two turbulence models—Spalart–Allmaras (SA) and k-ω EARSM—were conducted. Comparisons of leakage flow and stage efficiency for reference and fluidic sealing configurations are presented. Fluidic sealing configuration is effective and reduces the leakage flow by 13–18.5% (depending on the turbulence model). The analysis of the flow structure in the seal region revealed that the use of fluidic sealing resulted in significant circumferential flow anisotropy.

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Authors (5)

Filip Wasilczuk mgr inż
Paweł Flaszyński
Piotr Doerffer prof. dr hab. inż.
Krzysztof Marugi
Tomasz Borzęcki

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Keywords

LABYRINTH SEAL, FLOW CONTROL, LEAKAGE REDUCTION, CAVITY AND LEAKING FLOWS, COMPUTATIONAL FLUID DYNAMICS (CFD)

Details

Category:

Articles

Type:

artykuły w czasopismach

Published in:

JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME no. 146,
ISSN: 0889-504X

Language:

English

Publication year:

2024

Bibliographic description:

Wasilczuk F., Flaszyński P., Doerffer P., Marugi K., Borzęcki T.: The Application of Fluidic Sealing in Shrouded Gas Turbine Blades// JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME -Vol. 146,iss. 1 (2024),

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