Noise reduction mechanisms for the inclined leading edge vaned diffuser in a centrifugal fan

Wu, Qi; Zhang, Wei

doi:10.1177/0957650916688398

Cited by 4 publications

(1 citation statement)

References 16 publications

(27 reference statements)

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“…Wang [16] et al designed an impeller meridian shape, and with the help of numerical simulation methods, they proved that the aerodynamic performance of the fan has been improved and the velocity Processes 2024, 12, 353 3 of 21 distribution is more reasonable. Qi [17] et al conducted experimental and numerical studies on the noise reduction mechanism of tilted leading-edge blade diffusers for centrifugal fans, which showed that the tilted leading-edge diffuser is essential for improving the performance of the fan and reducing the noise of the fan.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Impeller Structure Parameters of a Centrifugal Fan in a Powered Air-Purifying Respirator Power System

Zhao,

Guan,

Wang

et al. 2024

Processes

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As the core power element of a centrifugal fan, the impeller’s structural parameters are important factors affecting the aerodynamic performance of the fan. Therefore, to improve the aerodynamic performance of centrifugal fans, in this study, we take the Powered Air-Purifying Respirator (PAPR) power system as the object of research and use a combination of computational fluid dynamics (CFD) and experimental validation to investigate the effects of the number of blades, blade inlet angle, blade outlet angle, blade height, and blade thickness on the aerodynamic performance of the fan. A five-factor, four-level orthogonal test table L16 (45) was selected to obtain the optimal combination of structural parameters for the impeller. In addition, in order to identify and visualize the features of the vortex, Q Criterion Normalized is applied to the simulation on the basis that the minimum pressure appears in the vortex core. In this study, Q Criterion Normalized is used to compare the internal vorticity of the prototype with that of the optimized prototype. The results show that (i) the order of influence of each parameter on the aerodynamic performance of the centrifugal fan is blade height > blade outlet angle > blade inlet angle > number of blades > blade thickness; (ii) the optimal combination of the structural parameters is number of blades 48, blade inlet angle 80°, blade outlet angle 120°, blade thickness 0.6 mm, and blade height 23 mm; the optimized prototype has an increase in air pressure of about 10%, an increase in air volume of about 31%, and an increase in efficiency from 49.61% to 53.57%; (iii) the intensity of internal vortices in the optimized prototype is weakened, the size of vortices and the number of vortices are reduced, and the homogeneity of the flow field is also improved.

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Section: Introductionmentioning

confidence: 99%

Optimization of Impeller Structure Parameters of a Centrifugal Fan in a Powered Air-Purifying Respirator Power System

Zhao,

Guan,

Wang

et al. 2024

Processes

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Centrifugal fan with inclined blades for vacuum cleaner motor

Prezelj

Novaković

2018

Applied Acoustics

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Reduction of aerodynamic noise of single-inlet centrifugal fan with inclined volute tongue

Hao

Wang

et al. 2020

Measurement and Control

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The effect of inclined volute tongue on the aerodynamic noise and performance of a centrifugal fan was investigated by experimental test in this article. The present work highlights that the effect of both the clearance and the radius of the volute tongue has an influence on the performance and noise. The experimental tests of various models aim to obtain the aerodynamic noise and performance characteristics of several fan models. First, the experimental results of centrifugal fan performance are tested by the standard test equipment of aerodynamic performance. The experimental results of centrifugal fan aerodynamic noise are measured by the standard test equipment of experimental noise. Our experimental results mainly show that the generation of aerodynamic noise is significantly correlated with the clearance and radius of the volute tongue. Certain geometries of the volute tongue could reduce the noise of the centrifugal fan without decreasing the performance. It is experimentally demonstrated that the high A-weighted sound pressure levels mainly concentrate on a range of from 700 to 7000 Hz frequency by observing the each 1/3 octave band frequency for four fan models. The comparison of aerodynamic noise results also demonstrates that the inclined volute tongue may not only produce a deceasing of about 1.58 dB compared to that of the baseline model. We further obtain that the properly inclined volute tongue not only has positive performance features compared with the baseline model but also effectively controls the broadband frequency noise of single-inlet centrifugal fan.

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Noise reduction mechanisms for the inclined leading edge vaned diffuser in a centrifugal fan

Cited by 4 publications

References 16 publications

Optimization of Impeller Structure Parameters of a Centrifugal Fan in a Powered Air-Purifying Respirator Power System

Optimization of Impeller Structure Parameters of a Centrifugal Fan in a Powered Air-Purifying Respirator Power System

Centrifugal fan with inclined blades for vacuum cleaner motor

Reduction of aerodynamic noise of single-inlet centrifugal fan with inclined volute tongue

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