Lean blow-out prediction in an industrial gas turbine combustor through a LES-based CFD analysis

Nassini, Pier Carlo; Pampaloni, Daniele; Meloni, Roberto; Andreini, Antonio

doi:10.1016/j.combustflame.2021.02.037

Cited by 41 publications

(29 citation statements)

References 41 publications

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“…It can be seen that the United States has already entered the stage of improvement, testing and application in terms of gas turbines. The improvement suggestions put forward by the investigation team will also improve the function of the test platform to a certain extent and provide improvement schemes for its gas turbine test platform [17]. This behavior is undoubtedly helping the development of foreign gas turbines.…”

Section: Status and Theoretical Analysis Of Heavy Duty Gas Turbine 31...mentioning

confidence: 99%

Research of Heavy-Duty Gas Turbines through Computer Mathematical Statistics and Big Data Analysis

Heng¹,

Li²,

Zhou³

2022

HSET

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Heavy duty gas turbine is the core power equipment of energy efficient conversion and clean utilization system in the 21st century and even longer. It is important for an efficient, clean and safe energy system. The heavy duty gas turbine is developed and manufactured at a level that represents a country's heavy industry and is by far the most efficient thermoelectric conversion equipment. This paper introduces the development status of the heavy duty gas turbine industry at home and abroad, summarizes the working principle and characteristics of heavy duty gas turbines, and prospects the development trend of heavy duty gas turbines.

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Section: Status and Theoretical Analysis Of Heavy Duty Gas Turbine 31...mentioning

confidence: 99%

Research of Heavy-Duty Gas Turbines through Computer Mathematical Statistics and Big Data Analysis

Heng¹,

Li²,

Zhou³

2022

HSET

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“…In this paper, in order to represent the flame blush, the FGM combustion model with an extended turbulent flame speed closure for the progress variable source term is used. The mathematical implementation of this customized model can be found in Nassini et al [38,39] and Romano et al [40]. The approach implements the heat loss on the flame propagation and the combined effect of the strain rate, resulting in a improvement of the prediction of the flame front position and morphology with benefits in terms of accuracy for both emissions [41,42] and combustion dynamic [43].…”

Section: Numerical Setting Combustion and Turbulence Modelsmentioning

confidence: 99%

Numerical Study of Combustor-Turbine Interaction by Using Hybrid RANS-LES Approach

Tomasello

Andreini

Meloni³

et al. 2022

Volume 6A: Heat Transfer — Combustors; Film Cooling

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The complex flow field of gas turbine lean combustors is meant to reduce NOx emissions and maintain a stable flame by controlling the local temperature and promoting high turbulent mixing. Still, this may produce large flow and temperature unsteady distortions capable of disrupting the aerodynamics and heat transfer of the first high-pressure-turbine cooled nozzle. Therefore, the interaction between the combustion chamber and the turbine nozzle is analyzed first with the help of scale-resolving simulations that notably also include a realistic turbine nozzle cooling system. To determine the nature and severity of the interaction, and the risks associated to performing decoupled simulation, the results of the coupled computer simulation are analyzed and compared with those of decoupled simulations. In this case, the combustor is computed by replacing the turbine nozzle with a discharge convergent with the same throat area, and the conditions at the interface plane are used as inlet boundary conditions for a conventional RANS of the nozzle. The analyses of the coupled and decoupled simulation reveal that the combustion chamber is weakly affected by the presence of the nozzle, whereas the two thermal fields of the nozzle surface differ considerably, as well as the disruption of the film cooling by the incoming flow distortions.

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“…This aspect is crucial especially for perfectly premixed flames characterized by long flames and quite homogeneous heat release distributions. The inclusion of the effect of strain in the flame brush description could potentially bring a benefit since it has been demonstrated that it provides improvements in the prediction capability of the combustion model [37][38].…”

Section: Numerical Findings: Validation Casesmentioning

confidence: 99%

Experimental and Numerical Characterization of the Self-Excited Dynamics Behavior of a Technically Premixed Burner

Meloni¹,

Gori²,

Riccio³

et al. 2022

Volume 3B: Combustion, Fuels, and Emissions

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In this paper, the numerical findings of a high fidelity CFD model will be compared with the experimental data of a test campaign devoted at characterizing the performance of a technically premixed industrial burner regarding the thermoacoustic instabilities. The data are retrieved at relevant gas turbine conditions in a test bench where the flame tube can change its length during the test execution allowing its fundamental acoustic frequencies to be modified and, in case, triggered. Mimicking the test configuration, several Large-Eddy Simulations are performed with different lengths of the flame tube in order to verify the ability of the numerical model to reproduce the excited dominant frequency and the corresponding limit cycle amplitude measurements. The numerical model demonstrates the ability to correctly reproduce the frequency triggered during the test and to reach different limit cycle amplitudes along different flame tube lengths in agreement with the tests, as well. However, it is found that the amplitude of the acoustic pressure fluctuation during the limit cycle is generally under-predicted. Despite this, the proposed approach demonstrates to be a robust tool for the characterization of a given design, allowing to dramatically reduce the computational cost of the analysis, at least in the early design phase. Since the numerical model can correctly reproduce the behavior of the investigated design, a deep post-processing of the solutions is performed to shed light on the physical mechanisms sustaining the thermo-acoustic instability. Among the numerical techniques employed at this purpose, the Phase-Locked Average and the Extended-POD are applied trying to correlate the fluctuations of the different quantities inside the premixed channel of the burner and the primary zone as well.

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Lean blow-out prediction in an industrial gas turbine combustor through a LES-based CFD analysis

Cited by 41 publications

References 41 publications

Research of Heavy-Duty Gas Turbines through Computer Mathematical Statistics and Big Data Analysis

Research of Heavy-Duty Gas Turbines through Computer Mathematical Statistics and Big Data Analysis

Numerical Study of Combustor-Turbine Interaction by Using Hybrid RANS-LES Approach

Experimental and Numerical Characterization of the Self-Excited Dynamics Behavior of a Technically Premixed Burner

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