Evaluating Combustion Instability in a Swirl-Stabilized Combustor Using Simultaneous Pressure, Temperature, and Chemiluminescense Measurements at High Repetition Rates

Monfort, Jeffrey R.; Stouffer, Scott D.; Hendershott, Tyler; Wrzesinski, Paul J.; Foley, William; Rein, Keith D.

doi:10.2514/6.2017-1101

Cited by 16 publications

(2 citation statements)

References 8 publications

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“…The referee combustor consists of all the features of a practical gas turbine combustor with a hybrid air blast fuel injector with multiple swirlers, primary and secondary rows of dilution holes, and a large number of patterned effusion cooling holes . 9,[27][28][29] The schematic drawing of the referee combustor and the three-dimensional computational domain with a Cartesian coordinate system, origin, and the axes are shown in Figure 1(a). The airflow passages through two sets of concentric axial swirlers and a set of radial swirlers are shown in Figure 1(b).…”

Section: Combustor Configurationmentioning

confidence: 99%

Numerical simulations and analysis of the turbulent flow field in a practical gas turbine engine combustor

Hasti

Kundu

Som

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part A:

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The turbulent flow field in a practical gas turbine combustor is very complex because of the interactions between various flows resulting from components like multiple types of swirlers, dilution holes, and liner effusion cooling holes. Numerical simulations of flows in such complex combustor configurations are challenging. The challenges result from (a) the complexities of the interfaces between multiple three-dimensional shear layers, (b) the need for proper treatment of a large number of tiny effusion holes with multiple angles, and (c) the requirements for fast turnaround times in support of engineering design optimization. Both the Reynolds averaged Navier–Stokes simulation (RANS) and the large eddy simulation (LES) for the practical combustor geometry are considered. An autonomous meshing using the cut-cell Cartesian method and adaptive mesh refinement (AMR) is demonstrated for the first time to simulate the flow in a practical combustor geometry. The numerical studies include a set of computations of flows under a prescribed pressure drop across the passage of interest and another set of computations with all passages open with a specified total flow rate at the plenum inlet and the pressure at the exit. For both sets, the results of the RANS and the LES flow computations agree with each other and with the corresponding measurements. The results from the high-resolution LES simulations are utilized to gain fundamental insights into the complex turbulent flow field by examining the profiles of the velocity, the vorticity, and the turbulent kinetic energy. The dynamics of the turbulent structures are well captured in the results of the LES simulations.

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Section: Combustor Configurationmentioning

confidence: 99%

Numerical simulations and analysis of the turbulent flow field in a practical gas turbine engine combustor

Hasti

Kundu

Som

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part A:

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“…Such measurements, although complex, are necessary for the design and development of the next-generation combustor technology. Monfort et al [29], at the University of Dayton have successfully performed simultaneous high-speed dynamic pressure measurements , and chemiluminescence imaging to explore combustion instability in a modern plenum-fed, swirl-stabilized combustor. Their combustor includes the liner geometry which resembles nearly to actual annular gas turbine combustor liner.…”

Section: Introductionmentioning

confidence: 99%

Insights into the dynamics of full-scale sector combustor isothermal flow field

Rathod,

Panda,

Basu

2024

Preprint

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An experimental investigation in a sector (20 degree) of a full-scale annular gas turbine combustor is performed. The sector combustor is optically accessible for the flow and flame visualization of the primary and exit zones of the combustor. The distinctive feature of the experimental setup is that it preserves the geometrical details of an annular combustor that includes the casing, dome and combustor liner. The combustor design features a series of primary and secondary dilution holes with multiple film cooling strips on the outer and inner liner. In the present study, the time-resolved Particle Image Velocimetry (PIV) experiments are conducted in the central longitudinal plane and two azimuthal planes to gain insight into the dynamics of the sector combustor. Proper Orthogonal Decomposition (POD) is applied to the data to obtain the dominant dynamics of the combustor. The major coherent structures of the swirl flow field, the primary dilution jets flow field, and the dominant interaction of swirl and dilution jets are elucidated here. The azimuthal plane data provides a three-dimensional explanation of dilution jet dynamics. The dynamics of the exit zone if found to be influenced by the secondary dilution jet dynamics. The spectral properties of dynamics are illustrated from the recorded acoustic (p') signal and the time coefficient of the POD eigenmodes. Further, the experiments are performed by blocking the dilution jets (without-DJ). These experimental data help to identify the source of the dominating frequency (fd) within the combustor, which is found to be the swirl flow instabilities. Without-DJ data also showcases the role of dilution jets in convecting the swirl flow generated acoustics to the exit zone. The reconstructed flow field using POD provides physical insights into the dynamics occurring within the sector combustor.

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Cost-constrained adaptive simulations of transient spray combustion in a gas turbine combustor

Mohaddes

Brouzet

Ihme

2023

Combustion and Flame

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Evaluating Combustion Instability in a Swirl-Stabilized Combustor Using Simultaneous Pressure, Temperature, and Chemiluminescense Measurements at High Repetition Rates

Cited by 16 publications

References 8 publications

Numerical simulations and analysis of the turbulent flow field in a practical gas turbine engine combustor

Numerical simulations and analysis of the turbulent flow field in a practical gas turbine engine combustor

Insights into the dynamics of full-scale sector combustor isothermal flow field

Cost-constrained adaptive simulations of transient spray combustion in a gas turbine combustor

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