Parametric study on a forward-curved blades centrifugal fan with an impeller separated by an annular plate

Kim, Jin‐Hyuk; Cha, Kyung-Hun; Kim, Kwang‐Yong

doi:10.1007/s12206-013-0404-4

Cited by 15 publications

(8 citation statements)

References 10 publications

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“…18 The steady flow field was simulated by solving incompressible Reynolds-averaged Navier-Stokes equations, while the SST k-v turbulence model 19 was used to calculate the turbulent viscosity reference to previous studies. 20,21 The minimum grid spacing on solid walls was kept less than 5 3 10 23 mm to evaluate the viscous fluxes at the walls. This minimum grid spacing gives y + \ 5 at the walls which satisfy the requirement of the SST k-v turbulence model in low Reynolds number simulations.…”

Section: Methodsmentioning

confidence: 99%

Effects of cut volute profile on squirrel cage fan performance and flow field

Jiang

Liu

et al. 2018

Advances in Mechanical Engineering

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The flow pattern in the volute of a squirrel cage fan is complicated and non-axisymmetric. In this article, the original volute profile of a squirrel cage fan was cut to control and reshape this non-axisymmetric flow structure. An experimental study was conducted to investigate the effects of the cut volute profile on the fan aerodynamic and acoustic performance. The results showed that cutting the volute profile with a relative cut position of 90°and a secondary clearance of 0.02D 2 could enhance the fan total pressure at the volume flow rate of 0.4Q BEP by about 7% without affecting the noise level. High-precision steady computational fluid dynamics simulation was also carried out to reveal the flow mechanism of the performance improvement. The results indicated that cut volute profile caused an impeller-across flow structure in the vicinity of the second clearance and re-organized the circumference distribution of the impeller flow status. Both the impeller working capability and the overall flow losses of the cut fan increased compared to the original one but the increment of the former was greater. This explains why fan pressure improved under low-flow conditions.

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Section: Methodsmentioning

confidence: 99%

Effects of cut volute profile on squirrel cage fan performance and flow field

Jiang

Liu

et al. 2018

Advances in Mechanical Engineering

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“…model 16 was used to calculate the turbulent viscosity. 17,18 The inlet boundary condition and the outlet boundary condition are set as Pressure inlet and Pressure outlet. The rotating region is set to the moving reference frame (MRF) multi-reference system model, which achieves a frame change across the interface without a relative position change.…”

Section: Cfd Analysesmentioning

confidence: 99%

Volute profile design of the squirrel cage fan based on a B-spline curve under space limitation

Xiao

Jang

Wang

2019

Proceedings of the Institution of Mechanical Engineers, Part A:

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The cut volute profile is far and widely used in the squirrel cage fan to meet the space limitation of range hood systems. The cut volute profile often causes unreasonable impeller–volute interference and the aerodynamic performance of the fan to drop. A numerical model combined with the neural network and the genetic algorithm of a squirrel cage fan volute for a range hood is presented in this paper. The secondary non-uniform B-spline curve represents the volute profile variation law, and its control points are used as design variables to meet space constraints. The goal of global optimization is to maximize the efficiency and volume flow rate. As a result of the optimization, the internal flow loss of the fan is reduced compared with the prototype. The volume flow rate and efficiency are increased by over 4.4% in case of optimized volute than the original configuration of the volute.

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“…1–5 As the core component of the squirrel cage fan, the impeller significantly affects the entire fan; optimizing its structure can greatly improve the fan’s performance. 6 This structure is mainly composed of a shroud, a back plate, and blades. There are three main existing optimization design methods for the impeller.…”

Section: Introductionmentioning

confidence: 99%

Blades optimal design of squirrel cage fan based on Hicks-Henne function

Zhou

Gao

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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The traditional single-arc blade used in the squirrel cage fan is simple in structure and cannot meet relevant parameterized design requirements. In order to improve the aerodynamic performance of single-arc blades of squirrel cage fans an improved Hicks-Henne function was used in this study to parameterize the blade expression in a Q35 single-suction squirrel cage fan. The AE criterion was used to optimize the Latin hypercube design, a Co-Kriging agent model was established with High and low confidence samples, and the NSGA-II algorithm was combined with the flow rate and total pressure efficiency as a multi-objective optimization goal. A set of optimal blade parameters was selected under the premise that the flow meets the design requirements. The optimized fan's total pressure and total pressure efficiency were improved at each working point. At the design working point, the fan's total pressure increased by about 23Pa, the effective air volume increased by 1.18m³/min, and the total pressure efficiency improved by 3.31%.

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Parametric study on a forward-curved blades centrifugal fan with an impeller separated by an annular plate

Cited by 15 publications

References 10 publications

Effects of cut volute profile on squirrel cage fan performance and flow field

Effects of cut volute profile on squirrel cage fan performance and flow field

Volute profile design of the squirrel cage fan based on a B-spline curve under space limitation

Blades optimal design of squirrel cage fan based on Hicks-Henne function

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