An integrated experimental and numerical study of forward–curved centrifugal fan

Lin, Shih-Yang; Huang, Chia-Lieh

doi:10.1016/s0894-1777(02)00112-7

Cited by 99 publications

(44 citation statements)

References 4 publications

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“…A good agreement between numerical simulation and test results successfully indicates great potential to reduce the expensive experimental work by using CFD (computational fluid dynamics) tools [3]. Recently, Lin and Tsai [4][5][6] utilized an inverse cascade method to design the performances of centrifugal and axial flow fans.…”

Section: Introductionmentioning

confidence: 77%

Numerical and Experimental Study on Enhancing Performance of the Stand Fan

Lin¹,

Shen²,

Tso³

et al. 2017

Applied Sciences

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Abstract:To meet humans' need of enhancing the quality of life, the high-performance stand fan has become an essential appliance in every family. On the other hand, energy saving can not only solve the problem of environment protection, but also can reduce the cost of energy consumption. However, the aerodynamic performance and flow characteristics of the stand fan are rarely investigated and analyzed in a systematical manner. Therefore, this research intends to investigate the physical mechanism of the flow pattern and identify the design parameters of the stand fan by combining numerical and experimental methods. First of all, both the structure and performance of a commercial 14-inch stand fan are chosen for analysis and are set as the reference for the fan. The stand fan can be divided into the impeller and the protective cover. Clearly, the impeller blades have a great influence on the fan performance, so they are the first design target. In this work, CFD (computational fluid dynamics) software Fluent (version 14.5, ANSYS Inc., Canonsburg, PA, USA, 2012) is used to analyze and observe the corresponding influences on flow fields and aerodynamic performance by changing the design parameters such as the setting, twist, and inclination angles. Then, the protective cover is studied, improved and integrated with the designed impeller to further enhance the performance of the fan. The protective cover is modified by varying the spacing between the blade tip and cover, as well as varying the shape and angle of ribs to improve the fan's flow field and performance. Finally, the optimal fan mockup is made via CNC (computer numerical control) technology. Also, its acoustics and performance have been measured to validate the accuracy and reliability of the numerical simulation. The testing results show that the optimally designed stand fan is better than the reference fan with a significant 54% increase in max flow rate. In addition, it has more uniform velocity distribution compared with the reference fan to achieve a comfortable feeling for the human body. In summary, this research successfully establishes a reliable and systematic scheme to design the stand fan. Also, the corresponding performance influences caused by those important parameters are analyzed and summarized to serve as the design reference for the stand fan.

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Section: Introductionmentioning

confidence: 77%

Numerical and Experimental Study on Enhancing Performance of the Stand Fan

Lin¹,

Shen²,

Tso³

et al. 2017

Applied Sciences

Self Cite

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“…Spalart-Allmaras model (one transport equation based on kinetic energy), k-ε model (two equations method based on kinetic energy and dissipation rate), k-ω (two equations method based on kinetic energy and turbulence frequency) and RSM model (seven transport equations based on Reynolds stresses) are compared to each other and the results presented in Table.3. All results, which are reported in Note that the uncertainty of experimental measurement is 2% [Lin et al 2002]. This uncertainty may cause a concern about the error percentages which obtain from different turbulence models.…”

Section: Turbulence Modelsmentioning

confidence: 99%

“…This fan is a forward curved centrifugal fan with 17 blade number and 16.5° inlet blade angle (according to Reference [Lin et al 2002] among angles of 0°, 16.5°, 26.5° the angle (16.5°) is the most efficient one) which is used for cooling the notebook computers. Its other geometric parameters are presented in table 1.…”

Section: Fan Specificationmentioning

confidence: 99%

“…They introduced RNG k-ε and 7 blades as the most suitable and efficient model and blade number. Lin and Huang in 2001 [Lin et al 2002] investigated a forward curved centrifugal fan with airfoil NACA4412 blades by STAR-CD CFD code and validated their numerical results with experimental data. They considered three blade inlet angles to find the most efficient one.…”

Section: Introductionmentioning

confidence: 99%

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Effect of blade type on a 3D FC centrifugal fan

Amjadimanesh

Ajam²,

Nezhad

2014

J Serb Soc Comp Mech

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In this paper, a 3D forward curved (FC) centrifugal fan is simulated numerically to predict the turbulent flow and pressure field of the fan. Through this numerical simulation, the various turbulent models are compared and the influence of blade shapes on the fan performance is examined. For this means, four turbulence models (k-ε, k-ω, RSM, Spallart Allmaras) are applied to choose the most suitable one. Also for three kinds of blade shapes (flat blade, circular blade and NACA4412 airfoil blade), the flow fields are simulated separately to determine the most efficient blade shape. In numerical analysis, FVM (finite volume method) is used to solve the governing equations. Steady state conditions and multiple reference frames, including a MRF (moving reference frame) for the rotor region and a stationary reference frame for stator region, are used for numerical modeling. The numerical results are validated with experimental data. It is observed that k-ε is the most suitable turbulence model and the circular blade is the most efficient shape for this type of fan.

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“…The load distribution was expressed by piecewise function, and velocity distribution was calculated accordingly. Lin S C [15] studied the performance of centrifugal fan used in notebook computer based on NACA4412 airfoil. The results show that the velocity distribution of flow channel is relatively reasonable, and the jet-wake pattern is inhibited.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Blade Profile of a Plenum Fan

Lin¹,

Dou²,

Wei³

et al. 2016

International Journal of Fluid Machinery and Systems

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A method of optimization design for the blade profile of a centrifugal impeller by controlling velocity distribution is presented, and a plenum fan is successfully designed. This method is based on the inner flow calculation inside the centrifugal impeller, and is related to the distribution of relative velocity. The results show that after optimization, the boundary layer separation on the suction surface has been inhibited and the stability of plenum fan is improved. The flow at the impeller outlet is also studied, and the jet-wake pattern at the impeller outlet is improved obviously by optimization. The calculation result shows that the static pressure and static pressure efficiency can be increased by 15.4% and 21.4% respectively.

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An integrated experimental and numerical study of forward–curved centrifugal fan

Cited by 99 publications

References 4 publications

Numerical and Experimental Study on Enhancing Performance of the Stand Fan

Numerical and Experimental Study on Enhancing Performance of the Stand Fan

Effect of blade type on a 3D FC centrifugal fan

Optimization of Blade Profile of a Plenum Fan

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