Noise Prediction of a Centrifugal Fan: Numerical Results and Experimental Validation

Ballesteros-Tajadura, Rafael; Velarde-Suáréz, Sandra; Hurtado-Cruz, Juan Pablo

doi:10.1115/1.2953229

Cited by 33 publications

(10 citation statements)

References 12 publications

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“…The continuity equation and momentum equations were solved independently of the energy equation because of the isothermal flow. The standard k-ε turbulence model, which Ballesteros-Tajadura [30] and Cai [31] applied to capture wall pressure fluctuations, was used in the present simulation of the unsteady flow field. A coupled solver, which uses a fully implicit discretization scheme to solve all of the equations (corresponding to the velocity and pressure), was used.…”

Section: Methodsmentioning

confidence: 99%

Vibroacoustic Optimization Study for the Volute Casing of a Centrifugal Fan

et al. 2019

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A numerical optimization is presented to reduce the vibrational noise of a centrifugal fan volute. Minimal vibrational radiated sound power was considered as the aim of the optimization. Three separate parts of volute panel thickness (ST: the side panel thickness; BT: the back panel thickness; FT: the front panel thickness) were taken as the design variables. Then, a vibrational noise optimization control method for the volute casing was proposed that considered the influence of vibroacoustic coupling. The optimization method was mainly divided into three main parts. The first was based on the simulation of unsteady flow to the fan to obtain the vibrational noise source. The second used the design of experiments (DoE) method and a weighted-average surrogate model (radial basis function, or RBF) with three design variables related to the geometries of the three-part volute panel thickness, which was used to provide the basic mathematical model for the optimization of the next part. The third part, implementing the low vibrational noise optimization for the fan volute, applied single-objective (taking volute radiated acoustical power as the objective function) and multi-objective (taking the volute radiated acoustical power and volute total mass as the objective function) methods. In addition, the fan aerodynamic performance, volute casing surface fluctuations, and vibration response were validated by experiments, showing good agreement. The optimization results showed that the vibrational noise optimization method proposed in this study can effectively reduce the vibration noise of the fan, obtaining a maximum value of noise reduction of 7.3 dB. The optimization in this study provides an important technical reference for the design of low vibroacoustic volute centrifugal compressors and fans whose fluids should be strictly kept in the system without any leakage.

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Section: Methodsmentioning

confidence: 99%

Vibroacoustic Optimization Study for the Volute Casing of a Centrifugal Fan

et al. 2019

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“…Table 2 were solved independently of the energy equation because of the isothermal flow. The Standard k-ε turbulence model, which was applied to capture wall pressure fluctuations by Ballesteros-Tajadura [24] and Cai [25], was used in the present simulation of the unsteady flow field. A coupled solver, which uses a fully implicit discretization scheme to solve all of the equations (corresponding to the velocity and pressure), was used.…”

Section: Dynamic Pressure Measurementmentioning

confidence: 99%

Vibro-Acoustic Optimization Study for the Volute Casing of a Centrifugal Fan

Zhang¹,

Chu²,

Zhang³

et al. 2018

Preprint

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Concerning fan systems with an air pipe connecting air intake and a closed outlet, aerodynamic noise cannot be directly transmitted from the fan inlet and outlet to the outside. At this moment, the volute vibrational radiation noise induced casing surface vibration is the major noise component. The main factors affecting the fan vibrational noise are analyzed through theoretical derivation, then a vibrational noise optimization control method for the volute casing is proposed that considered the influence of vibro-acoustic coupling, taking the panel thickness of the volute (front-panel thickness [FT], side-panel thickness [ST], and back-panel thickness [BT]) as design variables, and the acoustical power of the volute surface and the total mass of the volute as the optimal target function. The optimization method is mainly divided into three main parts: the first was based on the simulation of unsteady flow of the fan to obtain the vibrational noise source; the second, using the design of experimental (DOE) method and the proposed numerical simulation of fluid-structure-acoustic coupling method to obtain the designing space, then the radical-based function (RBF) method is used to construct the approximate surrogate model instead of the simulation model previously mentioned, which was used to provide the basic mathematical model for the optimization of the next part; the third part, implementing the low vibrational noise optimization for the fan volute, applied the single-target (taking volute radiated acoustical power as the target function) and the multi-target (taking the volute radiated acoustical power and volute total mass as the target function) methods. In addition, the fan aerodynamic performance, volute casing surface fluctuations, and vibration response were validated by experiments, showing good agreement. It is of utmost importance that the dynamic pressure measurements and vibrational tests on the volute casing verify the accuracy of the numerical calculation. The optimization results showed that the vibrational noise optimization method proposed in this study can effectively reduce the vibration noise of the fan, obtaining a maximum value of noise reduction of 7.3 dB. The optimization identified in this paper provides a significant reference for the design of a low-vibrational-noise volute.

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“…Among the types of passive noise control methods, we can mention acoustic silencers, noise barriers and, noise absorbing panels [ 2 ]. In the meantime, silencers or mufflers are used to reduce the noise propagated from numerous sources such as internal combustion engines, fans, compressors, turbines, air conditioning systems, blowers and so on [ 3 ]. There are various types of silencers which includes reactive, absorptive and hybrid ones.…”

Section: Introductionmentioning

confidence: 99%

Study of acoustic and aerodynamic performance of reactive silencer with different configurations: Theoretical, modeling and experimental

Rahimi Jokandan,

safari variani,

Ahmadi

2023

Heliyon

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Noise Prediction of a Centrifugal Fan: Numerical Results and Experimental Validation

Cited by 33 publications

References 12 publications

Vibroacoustic Optimization Study for the Volute Casing of a Centrifugal Fan

Vibroacoustic Optimization Study for the Volute Casing of a Centrifugal Fan

Vibro-Acoustic Optimization Study for the Volute Casing of a Centrifugal Fan

Study of acoustic and aerodynamic performance of reactive silencer with different configurations: Theoretical, modeling and experimental

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