Airfoil Design and Flow Analysis of a Multi-Blade Centrifugal Fan: An Experimental and Simulation Study
Source abstract
Abstract
To overcome the technical challenges of the multi-blade centrifugal fan, such as low efficiency and insufficient total pressure, the blades of the fan were optimally designed in this study. The flow field of the multi-blade centrifugal fan with a single-arc blade and an airfoil blade was simulated and compared using Computational Fluid Dynamics (CFDs). Under steady-state conditions, the total pressure, velocity field distribution, and aerodynamic performance of a multi-blade centrifugal fan were analyzed. The numerical results showed that there were vortices, secondary flows, and boundary layer separation phenomena in the flow passage of the single-arc multi-blade centrifugal fan. Based on the lift-to-drag ratio theory of airfoil in aerodynamics, four different airfoil blades were designed for the multi-blade centrifugal fan. The study found that the lift-to-drag ratio of the airfoil blades was positively correlated with the fan efficiency; among them, the A-type airfoil exhibited the highest lift-to-drag ratio within the 0–10 degree angle of attack range. The three-dimensional simulation results indicated that, except for the initial operating point B, the A-type airfoil showed higher fan efficiency under other operating conditions, and its total pressure curve was the most stable. In addition, the use of airfoil blades effectively suppressed the aforementioned adverse flow phenomena and improved the flow within the blade passage. Experimental verification further confirmed the effect of airfoil blades on improving fan performance: compared to single-arc blades, the efficiency of the multi-blade centrifugal fan increased by 3–7% after using airfoil blades, and the upper limit of high-efficiency flow increased from 450 m3/h to 650 m3/h. Meanwhile, the total pressure and power of the airfoil fan were also significantly improved. The results of this work are significant for guiding the optimal design of the fan.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Fluid Dynamics and Turbulent Flows · Turbomachinery Performance and Optimization · Heat Transfer Mechanisms
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 310018, China
Funding
National Natural Science Foundation of China
References (36)
Show source-provided references
1. Aerodynamic performances and wake topology past a square cylinder in the interface of two different-velocity streams10.1063/5.0090602 ↗
2. Study on the performance of a solid-state thermoelectric refrigeration system equipped with ionic wind fans for ultra-quiet operation10.1016/j.ijrefrig.2021.06.017 ↗
3. Effect of blade tip pattern on performance of a twin-stage variable-pitch axial fan10.1016/j.energy.2017.03.057 ↗
4. A brief status on condition monitoring and fault diagnosis in wind energy conversion systems10.1016/j.rser.2009.06.031 ↗
5. Study of flow instability in a centrifugal fan based on energy gradient theory10.1007/s12206-016-0103-z ↗
6. Vibrations of wind turbine blades in standstill: Mapping the influence of the inflow angles10.1063/5.0088036 ↗
7. Corsini, A., Delibra, G., Rispoli, F., Sheard, A.G., and Venturini, P. (2013, January 3–7). Aerodynamic Simulation of a High-Pressure Centrifugal Fan for Process Industries. Proceedings of the ASME Turbo Expo 2013: Turbine Technical Conference and Exposition, San Antonio, TX, USA.10.1115/GT2013-94982 ↗
8. Experimental and numerical investigations on effect of blade trimming on aerodynamic performance of squirrel cage fan10.1016/j.ijmecsci.2020.105579 ↗
9. Effects of bell mouth geometries on the flow rate of centrifugal blowers10.1007/s12206-011-0609-3 ↗
10. Numerical simulation of the wake dynamics of the pumpjet propulsor in oblique inflow10.1063/5.0091408 ↗
11. Tonal noise of voluteless centrifugal fan generated by turbulence stemming from upstream inlet gap10.1063/5.0055242 ↗
12. Particle image velocimetry and constant temperature anemometer measurements of the jet produced by a centrifugal fan10.1063/5.0052280 ↗
13. Numerical Investigation in the Vaned Distributor under Different Guide Vanes Openings of a Pump Turbine in Pump Mode10.18869/acadpub.jafm.68.224.24193 ↗
14. Song, H., Zhang, J., Huang, P., Cai, H., Cao, P., and Hu, B. (2020). Analysis of Rotor-Stator Interaction of a Pump-Turbine with Splitter Blades in a Pump Mode. Mathematics, 8.10.3390/math8091465 ↗
15. Study of Flow Instability in a Miniature Centrifugal Pump Based on Energy Gradient Method10.29252/jafm.12.03.28662 ↗
16. Experimental investigations on the performance and noise characteristics of a forward-curved fan with the stepped tongue10.1177/0020294019877482 ↗
17. Tantakitti, P., Pattana, S., and Wiratkasem, K. (2018, January 19–22). The performance of backward curved centrifugal fan with various impeller inlet and outlet angles. Proceedings of the International Conference on Engineering Science and Innovative Technology, North Bangkok, Thailand.10.1109/ESIT.2018.8665280 ↗
18. Effects of wing–body interaction on hawk moth aerodynamics and energetics at various flight velocities10.1063/5.0087161 ↗
19. Optimal thrust efficiency for a tandem wing in forward flight using varied hindwing kinematics of a damselfly10.1063/5.0093208 ↗
20. Spanwise-coherent hydrodynamic waves around flat plates and airfoils10.1017/jfm.2021.718 ↗
21. Aerodynamic Optimization of a Centrifugal Fan Using Response Surface Methodology10.4236/ojfd.2019.91007 ↗
22. Aero-mechanical optimisation of a structural fan outlet guide vane10.1007/s00158-010-0617-4 ↗
23. An optimal design algorithm for centrifugal fans: Theoretical and experimental studies10.1007/s12206-013-0126-7 ↗
24. Research on blade design method of multi-blade centrifugal fan for building efficient ventilation based on Hicks-Henne function
25. Zuo, K.-C., Wang, Y., and Zheng, X. (2020, January 23). Simulation study on the time-invariant air-flow characterization of centrifugal fan. Proceedings of the INTER-NOISE and NOISE-CON Congress and Conference Proceedings, Seoul, Republic of Korea.
26. Numerical simulation and performance optimization of the centrifugal fan in a vacuum cleaner10.1142/S0217984919504402 ↗
27. Application of Airfoil Impeller for Enhancement of Aerodynamic Performance of High Speed Centrifugal Fan10.3795/KSME-B.2016.40.5.321 ↗
28. Effect of Gurney Flap Configuration on the Performance of a Centrifugal Fan10.29252/jafm.12.02.28609 ↗
29. An integrated experimental and numerical study of forward–curved centrifugal fan10.1016/S0894-1777(02)00112-7 ↗
30. The effects of curvature on wake-dominated incompressible free shear layers10.1063/1.870168 ↗
31. Optimization of Wrap Angle in the Mixed Flow Impeller for Reducing Flow Losses
32. Peak lift-to-drag ratio enhancement of the DU12W262 airfoil by passive flow control and its impact on horizontal and vertical axis wind turbines10.1016/j.energy.2020.117659 ↗
33. Optimization of thick wind turbine airfoils using a genetic algorithm10.1007/s12206-018-0622-x ↗
34. Comparison of the power, lift and drag coefficients of wind turbine blade from aerodynamics characteristics of Naca0012 and Naca241210.1016/j.promfg.2019.02.312 ↗
35. (2016). Ansi/Amca. Laboratory Methods of Testing Fans for Certified Aerodynamic Performance Rating (Standard No. 210-16/ASHRAE).
36. ANSYS, Inc. (2022, August 07). ANSYS Fluent 2021R2 [Computer Software]. Available online: https://www.ansys.com/products/fluids/ansys-fluent.