Coupling Bionic Design and Numerical Simulation of the Wavy Leading-Edge and Seagull Airfoil of Axial Flow Blade for Air-conditioner

Document Type : Regular Article


1 School of Mechanical Engineering, Yancheng Institute of Technology, Yancheng 224051, P.R. China

2 Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng 224051, P. R. China



It is essential to maintain the aerodynamic performance of the air-conditioning system meanwhile reducing the noises (including aerodynamic, broadband, and discrete noises), determining the consumer's comfort level. In this work, depending on the coupling of the wavy leading-edge and the seagull airfoil, the aeroacoustics noise and aerodynamic performance of the impellers with the coupling bionic blade were investigated in detail. The results indicate the aerodynamic performance was improved by the coupling bionic optimization. Moreover, the total pressure efficiency (η) of the coupling bionic blade increases by 2.28% in comparison to the original blade. Furthermore, A smaller static differential pressure is observed between the suction and pressure sides, and vortices and backflows from the pressure side to the suction side are hampered, causing a reduction in turbulence noise. Additionally, the broadband noise of the coupling bionic blade decreases by 3.59 dB. Besides, the coupling bionic blade improves the directivity of the sound pressure level, especially in the middle-frequency and low-frequency region, resulting in a decrease of 7.9 dB for the aeroacoustics noise of the coupling bionic blade. What's more, the modal analysis demonstrates the security of the designed coupling bionic blade. In generally, this work provides some inspiration to design axial flow fans with excellent aerodynamic performance and low-noise characteristics.


Main Subjects

Abdolmaleki, M, H. Afshin and B. Farhanieh (2019). Performance analysis of elliptic-profile airfoil cascade for designing reversible axial flow fans. Aiaa Journal 57, 1492-1501.##
Balla, E. and J. Vad (2019). Lift and drag force measurements on basic models of low-speed axial fan blade sections. Proceedings of the Institution of Mechanical Engineers Part a-Journal of Power and Energy 233, 165-175.##
Bian, T., X. Shen, B. Wang, J. Feng and Q. Han (2019). Numerical and experimental investigation of flow loss and flow structure of circular arc cambered plate blade cascade. Proceedings of the Institution of Mechanical Engineers Part a-Journal of Power and Energy 233, 961-973.##
Biedermann, T. M., F. Kameier and C. O. Paschereit (2019). Successive aeroacoustic transfer of leading edge serrations from single airfoil to low-pressure fan application. Journal of Engineering for Gas Turbines and Power-Transactions of the Asme 141, 453-465.##
Brentner, K. S. (1988). Prediction of helicopter rotor discrete frequency noise for three scale models. Journal of Aircraft 25, 420-427.##
Chaitanya, P., P. Joseph, S. Narayanan, C. Vanderwel, J. Turner, W. J. Kim and B. Ganapathisubramani (2017). Performance and mechanism of sinusoidal leading edge serrations for the reduction of turbulence–aerofoil interaction noise. Journal of Fluid Mechanics 818, 435-464.##
Chang, X., L. Zhang, R. Ma and N. Wang (2019). Numerical investigation on aerodynamic performance of a bionic flapping wing. Applied Mathematics and Mechanics-English Edition 40, 1625-1646.##
Chen, K., W. W. Yao, J. H. Wei, R. B. Gao and Y. X. Li (2021). Bionic coupling design and aerodynamic analysis of horizontal axis wind turbine blades. Energy Science & Engineering 9, 1826-1838.##
Choi, J. S. (1994). Aerodynamic noise generation in centrifugal turbomachinery. KSME Journal 8, 161-173.##
Corsini, A., G. Delibra and A. G. Sheard (2014). The application of sinusoidal blade-leading edges in a fan-design methodology to improve stall resistance. Proceedings of the Institution of Mechanical Engineers Part a-Journal of Power and Energy 228, 255-271.##
Dong, X. and H. S. Dou (2021). Effects of bionic volute tongue bioinspired by leading edge of owl wing and its installation angle on performance of multi-blade centrifugal fan. Journal of Applied Fluid Mechanics 14, 1031-1043.##
Farassat, F. and K. S. Brentner (1998). The acoustic analogy and the prediction of the noise of rotating blades. Theoretical and Computational Fluid Dynamics 10, 155-170.##
Gao, R., K. Chen, Y. Li and W. Yao (2021). Investigation on aerodynamic performance of wind turbine blades coupled with airfoil and herringbone groove structure. Journal of Renewable and Sustainable Energy 13, 854-869.##
GB/T, 1236-2017 (2017). Performance Test of Industrial Ventilator with Standardized Air Duct. China Standard Press.##
GB/T, 2888-2008 (2008). Methods of Noise Measurement for Fans Blowers Compressors and Roots Blowers. China Standard Press.##
Guo, R., T. Mi, L. Li and R. Luo (2022). Research on aerodynamic performance and noise reduction of high-voltage fans on fuel cell vehicles. Applied Acoustics 186, 108454.##
Hua, X. (2013). Research on the Aerodynamic Characteristics of Wings of the seagull and the blade design Application. Ph. D. thesis, Jilin University, Jilin, China.##
Hua, X., C. Zhang, J. Wei, X. Hu and H. Wei (2019). Wind turbine bionic blade design and performance analysis. Journal of Visual Communication and Image Representation 60, 258-265.##
Iwase, T., T. Kishitani and M. Furukawa (2017). Study on influence of blade number on aerodynamic noise of half-ducted propeller fans for packaged air-conditioners. International Journal of Fluid Machinery and Systems 10, 318-327.##
Jiang, B., J. Wang, X. Yang, W. Wang and Y. Ding (2019). Tonal noise reduction by unevenly spaced blades in a forward-curved-blades centrifugal fan. Applied Acoustics 146, 172-183.##
Jung, J. H. and W. G. Joo (2019). The effect of the entrance hub geometry on the efficiency in an axial flow fan. International Journal of Refrigeration 101, 90-97.##
Kim, J. W., S. Haeri, and P. F. Joseph (2016). On the reduction of aerofoil–turbulence interaction noise associated with wavy leading edges. Journal of Fluid Mechanics 792, 526-552.##
Kroemer, F., A. Renz and S. Becker (2018a). Experimental investigation of the sound reduction by leading-edge serrations in axial fans. Aiaa Journal 56, 2086-2090.##
Kroemer, F., F. Czwielong and S. Becker (2019). Experimental investigation of the sound emission of skewed axial fans with leading-edge serrations. Aiaa Journal 57, 5182-5196.##
Kroemer, F. and S. Becker (2018b). Sound emission of low-pressure axial fans under distorted inflow conditions. Journal of Aerospace Engineering.##
Lallier-Daniels, D., M. Piellard, B. Coutty, and S. Moreau (2017). Aeroacoustic study of an axial engine cooling module using lattice-Boltzmann simulations and the Ffowcs Williams and Hawkings' analogy. European Journal of Mechanics B-Fluids 61, 244-254.##
Li, D., X. Liu, F. Hu and L. Wang (2020). Effect of trailing-edge serrations on noise reduction in a coupled bionic aerofoil inspired by barn owls. Bioinspiration & Biomimetics 15, 101901.##
Li, D., X. Liu, L. Wang, F. Hu and G. Xi (2021). Numerical study on the airfoil self-noise of three owl-based wings with the trailing-edge serrations. Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 235, 2003-2016.##
Li, Y., K. Chen, R. Gao, J. Wei and W. Yao (2022). Noise reduction of bionic coupling blades of horizontal axis wind turbine. Noise Control Engineering Journal 70, 169-187.##
Lim, T. G., J. H. Jung, W. H. Jeon, W. G. Joo and G. Minorikawa (2020). Investigation study on the flow-induced noise by winglet and shroud shape of an axial flow fan at an outdoor unit of air conditioner. Journal of Mechanical Science and Technology 34, 2845-2853.##
Liu, H., B. Liu, L. Li and H. Jiang (2003). Effect of leading-edge geometry on separation bubble on a NACA65 compressor blade. Journal of Engineering Thermophysics 24, 231-233.##
Liu, H., Y. Lu, J. Yang, X. Wang, J. Ju, J. Tu, Z. Yang, H. Wang and X. Lai (2021b). Aeroacoustic optimization of the bionic leading edge of a typical blade for performance improvement. Machines 9.##
Liu, H., Y. Lu, X. Wang, Y. Li, Y. Yan and X. Lai (2021a). Investigation of the effects of the vane blades on the CAP1400 nuclear coolant pump's performance based on a bionic strategy. Nuclear Engineering and Design 384, 379-394.##
Luo, B., W. L. Chu and H. G. Zhang (2020). Tip leakage flow and aeroacoustics analysis of a low-speed axial fan. Aerospace Science and Technology 98, 105700.##
Mo, J. O. and J. H. Choi (2020). Numerical investigation of unsteady flow and aerodynamic noise characteristics of an automotive axial cooling fan. Applied Sciences-Basel 10, 5432-5448.##
Neise, W. (1992). Review of fan noise generation mechanisms and control methods. In International Symposium on Fan Noise 1.-3.9.1992 Seulis, France, Publications CETIM, Seulis, France.##
Peng, Z., Y. Wu, J. Tian and H. Ouyang (2020). Discrete noise control of cooling fan module: Stator and rotor interaction. Applied Acoustics 165, 107308.##
Sasaki, S., K. Suzuki, Y. Onomichi and H. Hayashi (2013). Influence of diffuser on aerodynamic noise of a forward curved fan. Journal of Thermal Science 22, 433-438.##
Schram, C. and A. Hirschberg (2003). Application of vortex sound theory to vortex-pairing noise: sensitivity to errors in flow data. Journal of Sound and Vibration 266, 1079-1098.##
Takahashi, T., K. Fukudome, H. Mamori, N. Fukushima and M. Yamamoto (2020). Effect of characteristic phenomena and temperature on super-cooled large droplet icing on NACA0012 Airfoil and axial fan blade. Aerospace 7, 7070092.##
Tong, F., W. Qiao, K. Xu, L. Wang, W. Chen and X. Wang (2018). On the study of wavy leading-edge vanes to achieve low fan interaction noise. Journal of Sound and Vibration 419, 200-226.##
Tong, H., L. Li, L. Wang, L. Mao and W. Qiao (2021). Investigation of rotor-stator interaction broadband noise using a RANS-informed analytical method. Chinese Journal of Aeronautics 34, 53-66.##
Wang, L., X. Liu and D. Li (2021). Noise reduction mechanism of airfoils with leading-edge serrations and surface ridges inspired by owl wings. Physics of Fluids 33, 015123.##
Wang, L., X. Liu, L. Wu and D. Li (2022). Effect of the asymmetric bio-inspired trailing-edge serrations on sound suppression in a coupled owl-based airfoil. Applied Acoustics 191: 108667.##
Wang, M. and X. Liu (2019). Numerical investigation of aerodynamic and acoustic characteristics of bionic airfoils inspired by bird wing. Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, 4004-4016.##
Wen, X., D. Qi, Y. Mao and X. Yang (2013). Experimental and numerical study on the inlet nozzle of a small squirrel-cage fan. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 227, 450-463.##
Wu, L. and X. Liu (2021). Dynamic stall characteristics of the bionic airfoil with different waviness ratios. Applied Sciences-Basel 11, 9943.##
Wu, L., X. Liu, Y. Liu and G. Xi (2022). Using the combined flow control accessory to the aerodynamic performance enhancement of bio-inspired seagull airfoils. Journal of Renewable and Sustainable Energy 14, 534-548.##
Wu, Y. J. and D. G. Huang (2019). Optimization design of axial fan blade. Journal of the Chinese Institute of Engineers 42, 473-478.##
Xu, K., W. Qiao and L. Ji (2015). Experiment on noise reduction physical mechanism of serrated trailing edge structure. Hangkong Dongli Xuebao/Journal of Aerospace Power 30, 463-472.##
Xue, L., J. Liu, D. Wang and L. Zhao (2021). Experimental and numerical simulation investigations of an axial flow fan performance in high-altitude environments. Energy 234: 121281.##
Yan, H., C. Yu, L. Chai, Y. Li, V. Vnenkovskaia and H. Chen (2019). Design and investigation of the hydraulic performance of bionic hydrofoil based on the geometric features of sturgeons. Dyna 94, 278-285.##
Yan, H., X. Su, H. Zhang, J. Hang, L. Zhou, Z. Liu and Z. Wang (2020). Design approach and hydrodynamic characteristics of a novel bionic airfoil. Ocean Engineering 216, 108076.##
Yang, K., S. Q. Zhou, Y. J. Hu, H. X. Zhou and W. Y. Jin (2021). Energy efficiency optimization design of a forward-swept axial flow fan for heat pump. Frontiers in Energy Research 9, 700365.##
Yang, X., C. Wu, H. Wen and L. Zhang (2018). Numerical simulation and experimental research on the aerodynamic performance of large marine axial flow fan with a perforated blade. Journal of Low Frequency Noise, Vibration and Active Control 37, 410-421.##
Yu, P. X., J. H. Peng, J. Q. Bai, X. Han and X. Song (2020). Aeroacoustic and aerodynamic optimization of propeller blades. Chinese Journal of Aeronautics 33, 826-839.##
Zhang, M., Y. Zhang, C. Cai, H. Cao and Z. Zhang (2021). A review on modeling of bionic flow control methods for large-scale wind turbine blades. Journal of Thermal Science 30, 743-757.##
Zhang, W., J. Yuan, B. Zhou, H. Li and Y. Yuan (2018). The influence of axial-flow fan trailing edge structure on internal flow. Advances in Mechanical Engineering, 10: 1-12.##
Zuo, S. G., C. F. Xie, X. D. Wu, Y. J. Li and K. J. Wei (2019). Numerical simulation and optimization of aerodynamic noise for claw pole alternator. Proceedings of the Institution of Mechanical Engineers 233, 857-879.##