Numerical Simulation of the Non-Reactive and Reactive Flow in a Swirled Model Gas Turbine Combustor

Reichling, Gilles; Noll, Berthold; Aigner, Manfred

doi:10.2514/6.2013-2434

Cited by 10 publications

(10 citation statements)

References 32 publications

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“…This behavior was associated with the shape of the outer air nozzle which was contoured with a quarter circle at the exit so that the air flow was guided radially outwards. The contour posed a certain problem for the numerical simulation because the exact location of the detachment of the flow from the quarter circle was difficult to predict correctly [Reichling 2013, See 2014, See 2015, Widenhorn 2009. Further, the ratio of the mass flows through the two swirlers could not be controlled or measured and thus was a source of uncertainty in the boundary conditions.…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of thermo-acoustic instabilities in a generic gas turbine combustor by phase-correlated PIV, chemiluminescence, and laser Raman scattering measurements

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Experimental analysis of thermo-acoustic instabilities in a generic gas turbine combustor by phase-correlated PIV, chemiluminescence, and laser Raman scattering measurements

et al. 2015

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“…The computational setup of the reacting CFD simulations was introduced extensively by Reichling et al [40] and is therefore only sketched here. The employed grid is shown in Fig.…”

Section: Cfd Setupmentioning

confidence: 99%

“…with the concentrations C α [40]. k f,r and k b,r are the forward and backward rate constants which are fitted to the prevailing thermodynamic conditions.…”

mentioning

confidence: 99%

Stochastic and Direct Combustion Noise Simulation of a Gas Turbine Model Combustor

Grimm¹,

Geichling²,

Ewert³

et al. 2017

Acta Acustica united with Acustica

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The hybrid time-domain method 3D FRPM-CN con-9 sists of a stochastic sound source reconstruction al-10 gorithm, the Fast Random Particle Method (FRPM) 11 and sound propagation by linearized Euler Equations. 12 The method is herein evaluated for its capability of 13 Combustion Noise (CN) prediction. Monopole sound 14 sources are reconstructed by using an estimation of 15 turbulence statistics from reacting, steady-state CFD-16 RANS. 17 As a direct approach, a Compressible Projection 18 Method (CPM) is applied. It is an extension of con-19 ventional pressure-based methods for the treatment 20 of compressible flows. This solution strategy is imple-21 mented as a fractional step scheme in the DLR Finite 22 Volume based research code THETA. CFD results of 23 CPM and RANS are furthermore compared to results 24 from a conventional incompressible projection method 25 (IPM). 26 First, steady state and unsteady CFD simulations of 27 flow field and combustion of the model combustor are 28 compared to experimental data. Two equation mod-29 eling for turbulence and global chemistry treatment 30 for combustion are employed. Turbulence in unsteady 31 computations is depicted with a scale adaptive simu-32 lation (SAS). In a second step, the hybrid acoustics 33 simulation setup for the model combustor is intro-34 duced. Selected results are presented and 3D FRPM-35 CN pressure spectra are compared to experimental 36 data and results from CPM. Finally, computational 37 turnaround times of hybrid and direct approach are 38 evaluated and opposed.

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“…3 the flow and combustion statistics of which are taken for the later CCA sound source reconstruction. Combustion is modeled with a combined EDM/FRC ansatz [45] for the treatment of global reaction schemes. A methane air mixture for combustion is investigated and two global reaction schemes are tested, a one-step mechanism proposed by Westbrook and Dryer [46] (WB1) and a five-step approach from Nicol et a.…”

Section: Numerical Cfd Setupmentioning

confidence: 99%

Broadband Combustion Noise Simulation of the PRECCINSTA Burner Based on Stochastic Sound Sources

Grimm

Ohno

Noll

et al. 2016

Journal of Engineering for Gas Turbines and Power

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Combustion noise in the laboratory scale PRECCINSTA (prediction and control of combustion instabilities in industrial gas turbines) burner is simulated with a new, robust, and highly efficient approach for combustion noise prediction. The applied hybrid method FRPM-CN (fast-random particle method for combustion noise prediction) relies on a stochastic, particle-based sound source reconstruction approach. Turbulence statistics from reacting CFD-RANS (computational fluid dynamics–Reynolds-Averaged Navier–Stokes) simulations are used as input for the stochastic method, where turbulence is synthesized based on a first-order Langevin ansatz. Sound propagation is modeled in the time domain with a modified set of linearized Euler equations and monopole sound sources are incorporated as right-hand side forcing of the pressure equation at every timestep of the acoustics simulations. First, the reacting steady-state CFD simulations are compared to experimental data, showing very good agreement. Subsequently, the computational combustion acoustics (CCA) setup is introduced, followed by comparisons of numerical with experimental pressure spectra. It is shown that FRPM-CN accurately captures absolute combustion noise levels without any artificial correction. Benchmark runs show that the computational costs of FRPM-CN are much lower than that of direct simulation approaches. The robustness and reliability of the method is demonstrated with parametric studies regarding source grid refinement, the choice of either RANS or URANS statistics, and the employment of different global reaction mechanisms.

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Numerical Simulation of the Non-Reactive and Reactive Flow in a Swirled Model Gas Turbine Combustor

Cited by 10 publications

References 32 publications

Experimental analysis of thermo-acoustic instabilities in a generic gas turbine combustor by phase-correlated PIV, chemiluminescence, and laser Raman scattering measurements

Experimental analysis of thermo-acoustic instabilities in a generic gas turbine combustor by phase-correlated PIV, chemiluminescence, and laser Raman scattering measurements

Stochastic and Direct Combustion Noise Simulation of a Gas Turbine Model Combustor

Broadband Combustion Noise Simulation of the PRECCINSTA Burner Based on Stochastic Sound Sources

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