Experimental and numerical investigation of Helmholtz resonators and perforated liners as attenuation devices in industrial gas turbine combustors

Houston, Brian H.; Wang, Jianguo; Qin, Qin; Rubini, Philip A.

doi:10.1016/j.fuel.2014.12.001

Cited by 5 publications

(3 citation statements)

References 22 publications

(32 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Take advantage of this feature, HRs are applied to noise reduction, especially low-frequency noise. There are some researches exploring possibilities of applying HRs on gas turbine combustors, 42 tunnels for high-speed trains, 43 rocket fairings 44 and so on.…”

Section: Helmholtz Resonatormentioning

confidence: 99%

An accurate triangular spectral element method-based numerical simulation for acoustic problems in complex geometries

Qin

Wang

2020

International Journal of Aeroacoustics

View full text Add to dashboard Cite

An accurate triangular spectral element method (TSEM) is developed to simulate acoustic problems in complex computational domains. With Fekete points and Koornwinder-Dubiner polynomials introduced, triangular elements are used in the present method to substitute quadrilateral elements in traditional spectral element method (SEM). The efficiency of discretizing complex geometry is enhanced while high accuracy of SEM is remained. The weak form of the second-order governing equations derived from the linearized Euler equations (LEEs) are solved, and perfectly matched layer (PML) boundary condition is implemented. Three benchmark problems with analytical solutions are employed to testify the exponential convergence rate, convenient implementation of solid wall boundary condition and capable discretization in complex geometries of the present method respectively. An application on Helmholtz resonator (HR) is presented as well to demonstrate the possibility of using the present method in practical engineering. The numerical resonance frequency of HR reaches an excellent agreement with the theoretical result.

show abstract

Section: Helmholtz Resonatormentioning

confidence: 99%

An accurate triangular spectral element method-based numerical simulation for acoustic problems in complex geometries

Qin

Wang

2020

International Journal of Aeroacoustics

View full text Add to dashboard Cite

show abstract

“…A number of parameters impact the ability of perforated wall liners to attenuate pressure fluctuations. Geometric factors include the liner geometry [10][11][12], liner thickness [13,14] and the shape of the cavity [15][16][17]. Flow parameters include the sound pressure level [18][19][20], bias flow and grazing flow velocity [21][22][23][24] and temperature of the grazing flow [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

A Porous Media Model for the Numerical Simulation of Acoustic Attenuation by Perforated Liners in the Presence of Grazing Flows

Wang¹,

Rubini

Qin

2021

Applied Sciences

View full text Add to dashboard Cite

In this paper, a novel model is proposed for the numerical simulation of noise-attenuating perforated liners. Effusion cooling liners offer the potential of being able to attenuate combustion instabilities in gas turbine engines. However, the acoustic attenuation of a perforated liner is a combination of a number of interacting factors, resulting in the traditional approach of designing perforated combustor liners relying heavily on combustor rig tests. On the other hand, direct computation of thousands of small-scale holes is too expensive to be employed as an engineering design tool. In recognition of this, a novel physical velocity porous media (PVPM) model was recently proposed by the authors as a computationally less demanding approach to represent the acoustic attenuation of perforated liners. The model was previously validated for the normal incidence of a sound wave by comparison with experimental data from impedance tubes. In this paper, the model is further developed for configurations where the noise signal propagates in parallel with the perforated liners, both in the presence and absence of a mean flow. The model is significantly improved and successfully validated within coexisting grazing and bias flow scenarios, with reference to a series of well-recognized experimental data.

show abstract

“…A considerable literature exists, reporting experimental studies in which the acoustic properties of perforated liner absorbers are influenced by a variety of flow and geometry factors. Among these influencing factors, important geometric factors include plate porosity (7)(8)(9), liner thickness (5,10), perforation geometry (11)(12)(13), and geometry of the cavity (14)(15)(16). Important flow factors include incident sound pressure level (17)(18)(19), bias flow and grazing flow speeds (10,(20)(21)(22)(23).…”

Section: Introductionmentioning

confidence: 99%

Application of a porous media model for the acoustic damping of perforated plate absorbers

2017

View full text Add to dashboard Cite

Perforated panel, or plate, absorbers are commonly employed to reduce sound pressure levels across a broad range of applications including the built environment, industrial installations and propulsion devices. The acoustic performance of a perforated plate absorber depends upon a number of parameters such as physical geometry of the absorber, acoustic spectrum and sound pressure level of the acoustic source. As a consequence, experimental determination of acoustic properties is often required on an individual basis in order to optimise performance.Computational simulation of a perforated plate absorber would alleviate the necessity for experimental characterisation. Fundamentally this can be achieved by the direct numerical solution of the underlying governing equations, the compressible form of the Navier-Stokes equations. The numerical methodology is available and routinely implemented as a Computational Fluid Dynamics solver. However, the numerical simulation of flow through a perforated plate with a large number of very small orifices would require significant computational resource, not routinely available for engineering design simulations.In this paper, a porous media model, implemented as a sub-model within a CFD solver, is investigated and validated against a number of well-acknowledged acoustic experiments undertaken in an impedance tube, for a sound pressure wave incident normal to a perforated plate. The model expresses the underlying governing equations within the perforated plates in terms of a pseudophysical velocity representation. Comparison between three dimensional, compressible, laminar flow CFD simulations and experimental data, demonstrate that the porous model is able to represent acoustic properties of perforated plate absorbers in linear and non-linear absorption regimes and also the inertial effect in the presence of a mean bias flow.The model significantly reduces the computational resource required in comparison to full geometric resolution and is thus a promising tool for the engineering design of perforated plate absorbers.

show abstract

Experimental and numerical investigation of Helmholtz resonators and perforated liners as attenuation devices in industrial gas turbine combustors

Cited by 5 publications

References 22 publications

An accurate triangular spectral element method-based numerical simulation for acoustic problems in complex geometries

An accurate triangular spectral element method-based numerical simulation for acoustic problems in complex geometries

A Porous Media Model for the Numerical Simulation of Acoustic Attenuation by Perforated Liners in the Presence of Grazing Flows

Application of a porous media model for the acoustic damping of perforated plate absorbers

Contact Info

Product

Resources

About