Flow characteristics of a centrifugal fan with optimized edge curvatures of an impeller front disk

Zheng, Shuihua; Shao, Zhenghao; Liu, Jianfei; Chen, Jinxue; Li, Yiliang; Chai, Min

doi:10.1177/09576509231154950

Cited by 3 publications

(1 citation statement)

References 24 publications

(25 reference statements)

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“…Moreover, Zheng et al [24] researched the internal flow characteristics of a centrifugal fan from changing edge curvatures of the impeller front disk using the CFD and test method. Engin, T. [25] researched the tip clearance effects for centrifugal fans using the CFD and test methods.…”

Section: Reference Optimization Parameter Methodsmentioning

confidence: 99%

Aerodynamics Optimization of Multi-Blade Centrifugal Fan Based on Extreme Learning Machine Surrogate Model and Particle Swarm Optimization Algorithm

Meng

Wang

Ming

et al. 2023

Metals

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The centrifugal fan is widely used in converting mechanical energy to aerodynamic energy. To improve the pressure of the multi-blade centrifugal fan used in an air purifier, an optimization process was proposed based on extreme learning machine (ELM) combined with particle swarm optimization (PSO). The blade definition position parameter and blade definition radian parameter were designed using the full-factor simulation experimental method. The steady numerical simulation of each experimental point was carried out using ANSYS CFX software. The total pressure of the multi-blade centrifugal fan was selected as the optimization response. The optimized ELM combined with the PSO algorithm considering the total pressure response value and the two multi-blade centrifugal fan parameters were built. The PSO algorithm was used to optimize the approximation blade profile to obtain the optimum parameters of the multi-blade centrifugal fan. The total pressure was improved from 140.6 Pa to 151 Pa through simulation experiment design and improved surrogate optimization. The method used in the article is meant for improving multi-blade centrifugal total pressure. The coupling optimization of impellers, volutes, and air intakes should be comprehensively considered to further improve the performance of centrifugal fans.

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Section: Reference Optimization Parameter Methodsmentioning

confidence: 99%

Aerodynamics Optimization of Multi-Blade Centrifugal Fan Based on Extreme Learning Machine Surrogate Model and Particle Swarm Optimization Algorithm

Meng

Wang

Ming

et al. 2023

Metals

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A novel bionic impeller for laptop cooling fan system

Amer

2023

Results in Engineering

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Improvement of aerodynamic performance of a volute-free centrifugal fan at a large flow rate using a wavy shroud

Qin,

He,

Luo

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part A:

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The volute-free centrifugal fans in ventilation applications are used to exhaust a large amount of air under the effect of the head loss in the ventilation pipeline system, thus, a high static pressure rise at a large flow rate of the fans is anticipated. The shroud of the conventional volute-free centrifugal fans has an axisymmetric geometry, that is, the height of the fan outlet is constant over the whole circumference. Considering the non-uniform flow in the blade passages, the shroud of a wavy geometry might help in improving the static pressure rise and efficiency of the fans at a large flow rate condition. In this work, we performed a numerical investigation on the internal flow of a volute-free centrifugal fan with a wavy shroud. The effect of the geometry of the wavy shroud, as quantified by the maximum height and profile, on the aerodynamic performance of the fan is explored, and the flow physics leading to the performance improvement are demonstrated through a detailed analysis of the patterns of the internal flow. The numerical results showed that compared with the baseline fan with an axisymmetric shroud, the fan with a wavy shroud could substantially improve the static pressure rise and efficiency at the large flow rate. The wavy shroud regulates the near-wall flow especially at the fan outlet; the fluctuation of the radial velocity, secondary flow, and reversed flow is greatly weakened, producing a uniform flow at the fan outlet. The fluctuation of the static pressure in the blade passages and on the shroud side of the fan outlet greatly decreases. Further analysis of the acoustic power level field indicates that the wavy shroud increases the acoustic power at the fan inlet but does not have a notable influence on that near the outlet.

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Flow characteristics of a centrifugal fan with optimized edge curvatures of an impeller front disk

Cited by 3 publications

References 24 publications

Aerodynamics Optimization of Multi-Blade Centrifugal Fan Based on Extreme Learning Machine Surrogate Model and Particle Swarm Optimization Algorithm

Aerodynamics Optimization of Multi-Blade Centrifugal Fan Based on Extreme Learning Machine Surrogate Model and Particle Swarm Optimization Algorithm

A novel bionic impeller for laptop cooling fan system

Improvement of aerodynamic performance of a volute-free centrifugal fan at a large flow rate using a wavy shroud

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