Computation of Combustion Noise from a Premixed and Pressurized Propane Flame Using Statistical Noise Modeling

Ullrich, Wolfram C.; Hirsch, Christoph; Sattelmayer, Thomas

doi:10.2514/6.2016-4590

Cited by 2 publications

(4 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7, respectively [1,38]. The validity of this model for the nozzle was proven in previous studies [25,29]. All walls are characterized by slip boundary conditions, i.e.û • n = 0 , as viscosity can most probably be neglected in the low frequency range.…”

Section: Rans/lnse-approachmentioning

confidence: 69%

“…The presentation of the results is focused on the acoustic part, while the RANS mean flow simulations and a comparison with PIV measurements are only briefly discussed. Further details of the mean flow simulation results can be found in a previous study [25].…”

Section: Resultsmentioning

confidence: 99%

“…Then combustion noise sources are introduced by the volume source termŝ V in the linearized continuity Eq. (1) [25]. The volume source term and volumetric heat release are related through Eq.…”

Section: Rans/lnse-approachmentioning

confidence: 99%

“…In this study the complex CESAM-HP combustor is considered. The acoustic model of the LNSE solver of the CESAM-HP combustor is based on previous studies where the LNSE were applied in conjunction with a statistical noise model [12,25].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Prediction of Combustion Noise in a Model Combustor Using a Network Model and a LNSE Approach

Ullrich

Mahmoudi

Lackhove

et al. 2017

Journal of Engineering for Gas Turbines and Power

Self Cite

View full text Add to dashboard Cite

The reduction of pollution and noise emissions of modern aero engines represents a key concept to meet the requirements of the future air traffic. This requires an improvement in the understanding of combustion noise and its sources, as well as the development of accurate predictive tools. This is the major goal of the current study where the low-order thermo-acoustic network (LOTAN) solver and a hybrid computational fluid dynamics/computational aeroacoustics approach are applied on a generic premixed and pressurized combustor to evaluate their capabilities for combustion noise predictions. LOTAN solves the linearized Euler equations (LEE) whereas the hybrid approach consists of Reynolds-averaged Navier–Stokes (RANS) mean flow and frequency-domain simulations based on linearized Navier–Stokes equations (LNSE). Both solvers are fed in turn by three different combustion noise source terms which are obtained from the application of a statistical noise model on the RANS simulations and a post-processing of incompressible and compressible large eddy simulations (LES). In this way, the influence of the source model and acoustic solver is identified. The numerical results are compared with experimental data. In general, good agreement with the experiment is found for both the LOTAN and LNSE solvers. The LES source models deliver better results than the statistical noise model with respect to the amplitude and shape of the heat release spectrum. Beyond this, it is demonstrated that the phase relation of the source term does not affect the noise spectrum. Finally, a second simulation based on the inhomogeneous Helmholtz equation indicates the minor importance of the aerodynamic mean flow on the broadband noise spectrum.

show abstract