The study of inlet flow distortion (hot streaks and entropy waves) propagation through high-pressure turbine (HPT) stages is an open topic for aero-engine design, due to their multiple effects on aerodynamics, heat exchange and noise generation. The request to design compact and lightweight systems has recently led to a reduction of the combustor-turbine axial gap, making the interaction between the HPT and the combustor extremely critical. For this reason, the main aim of the present work is to numerically study how different clocking positions between temperature distortions and stator vanes can affect the evolution of hot streaks and entropy waves. In order to validate the numerical results, experimental data coming from an un-cooled high-pressure gas turbine stage tested at the Laboratorio di Fluidodinamica delle Macchine (LFM) of the Politecnico di Milano (Italy) has been used. The good agreement between numerical results and experimental data confirms the accuracy of the approach based on the CFD TRAF code and suggests recommendations for the design of the following rows.
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17 December 2019
74TH ATI NATIONAL CONGRESS: Energy Conversion: Research, Innovation and Development for Industry and Territories
11–13 September 2019
Modena, Italy
Research Article|
December 17 2019
Numerical study of a high-pressure turbine stage with inlet distortions
Marco Bicchi;
Marco Bicchi
a)
1
Department of Industrial Engineering, Università degli Studi di Firenze
, Via di S. Marta 3, 50139 Firenze, Italy
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Lorenzo Pinelli;
Lorenzo Pinelli
b)
1
Department of Industrial Engineering, Università degli Studi di Firenze
, Via di S. Marta 3, 50139 Firenze, Italy
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Michele Marconcini;
Michele Marconcini
1
Department of Industrial Engineering, Università degli Studi di Firenze
, Via di S. Marta 3, 50139 Firenze, Italy
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Paolo Gaetani;
Paolo Gaetani
2
Energy Department, Politecnico di Milano
, Via Lambruschini 4, 20158 Milano, Italy
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Giacomo Persico
Giacomo Persico
2
Energy Department, Politecnico di Milano
, Via Lambruschini 4, 20158 Milano, Italy
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AIP Conf. Proc. 2191, 020020 (2019)
Citation
Marco Bicchi, Lorenzo Pinelli, Michele Marconcini, Paolo Gaetani, Giacomo Persico; Numerical study of a high-pressure turbine stage with inlet distortions. AIP Conf. Proc. 17 December 2019; 2191 (1): 020020. https://doi.org/10.1063/1.5138753
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