Parametric studies on gas turbine labyrinth seal for the secondary air flow optimization at static and rotating conditions

Kaliraj, KR and Yepuri, GB and Sarasamma, JJ and Kumar, K and Jesuraj, F (2019) Parametric studies on gas turbine labyrinth seal for the secondary air flow optimization at static and rotating conditions. In: ASME 2019 Gas Turbine India Conference, GTINDIA 2019, December 5–6, 2019, Chennai, Tamil Nadu, India.

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Abstract

Various studies have been carried out related to the labyrinth seals and reported in the open literature using the different seal arrangements at the stator-rotor seal cavity region. In the present study, numerical analysis has been carried out for the static and rotational effects of labyrinth seals at various flow and geometrical, parametric conditions for the optimized leak flow using straight and steeped seal configurations. And, an experimental data has been generated for the straight through seals, and the numerical data of the same case is validated with the experimental data. The k-omega SST turbulence model is considered with 5% turbulence intensity for the CFD analysis. At a particular seal clearance, as the number of teeth increases the leakage flow is found to be decreased. The leak flow is found to be lower with the stepped labyrinth seals in comparison to the straight through seals. The leak flow amount is found to be lower at a rotational condition in comparison to the stationary condition. From the overall results, it is observed that the stepped seal with a lower clearance at a compressor bleed air temperature and rotational conditions have shown better performance with the lower leak air mass flow.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Labyrinth seal, Rotational effects, CFD, K-omega SST turbulence, Airflow function
Subjects: AERONAUTICS > Aerodynamics
AERONAUTICS > Aircraft Propulsion and Power
Depositing User: Smt Bhagya Rekha KA
Date Deposited: 07 Jun 2022 11:13
Last Modified: 07 Jun 2022 11:13
URI: http://nal-ir.nal.res.in/id/eprint/13588

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