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Numerical Study on Aeroacoustics Behaviour of Contra-Rotating Fans

Numerical Study on Aeroacoustics Behaviour of Contra-Rotating Fans
	© 2021 by IJETT Journal
	Volume-69 Issue-8
	Year of Publication : 2021
	Authors : Bukhari Manshoor, Chia I Shin, Djamal Hissein Didane, Amir Khalid, Muhammed Abdelfattah Sayed Abdelaal
	DOI :  10.14445/22315381/IJETT-V69I8P214

How to Cite?

Bukhari Manshoor, Chia I Shin, Djamal Hissein Didane, Amir Khalid, Muhammed Abdelfattah Sayed Abdelaal, "Numerical Study on Aeroacoustics Behaviour of Contra-Rotating Fans," International Journal of Engineering Trends and Technology, vol. 69, no. 8, pp. 109-116, 2021. Crossref, https://doi.org/10.14445/22315381/IJETT-V69I8P214

Abstract
The contra-rotating fan produces noise that can affect human health. Therefore, it is important to reduce the noise that is generated by the contra-rotating fan. In this research, the airflow performance and acoustic behaviour of the contra-rotating fan will be studied. The objectives of this study are to perform the simulations for the flow generation by the contra-rotating fans, furthermore, investigate the effect of the different spacing between the two propellers on the noise generation. The ANSYS Fluent with the RNG K-? model was used to simulate the steady flow field of the fan, while Ffowcs Williams and Hawkings (FW-H) model was used to simulate the acoustic of the fan set. The simulation results show that the main source of the noise was from the fan propellers. The performance of the contra-rotating fan increases when the rotating speed of the propellers increases. However, it will also increase the noise. For the effect of distance between the two propellers, the noise generated by the contra-rotating fan decreases with the increase of the distance between the propellers. It can be concluded that with the suitable distance between the two propellers and rotating speed, the fan could function more efficiently while producing less noise.

Keywords
Aeroacoustic, Airflow, Contra-rotating fan, Noise, Sound pressure

Reference
[1] Q. G. Chen, W. Sun, F. Li, and Y. J. Zhang, Air-Structure Coupling Features Analysis of Mining Contra-Rotating Axial Flow Fan Cascade, IOP Conf. Series: Materials Science and Engineering, 52 (2013) 022040.
[2] N. Mathan Kumar, C.K. Murugesan, P. Saravanan, Design & Performance Analysis Of Exhaust Fan Blade, IJETT International Journal of Mechanical Engineering 7(4) (2020) 25-28.
[3] R. A. D. Akkermans, M. Pott-Pollenske, H. Buchholz, J. W. Delfs, and D. Almoneit, Installation Effects of a Propeller Mounted on a High-Lift Wing with a Coanda Flap - Part I: Aeroacoustic experiments, in 20th AIAA/CEAS Aeroacoustics Conference (2014) 1-14.
[4] B. Manshoor and A. Khalid, Numerical Investigation of the Circle Grids Fractal Flow Conditioner for Orifice Plate Flowmeters, Applied Mechanics and Materials 229-231 (2012) 700-704.
[5] T. Shigemitsu, J. Fukutomi, Y. Okabe, K. Iuchi, and H. Shimizu, Unsteady Flow Condition of Contra-Rotating Small-Sized Axial Fan, J. Therm. Sci. 20 (2011) 495–502.
[6] H.S. Kadhim, Modeling and Numerical Simulation for the New Design Combined Blades Vertical Axis Wind Turbine, Al-Muhandis Journal 155(2) (2018) 7-13
[7] K.B. Gaywala, H.A. Shah, P.T. Patel, Performance Prediction of a Straight-Bladed Darrieus Water Turbine using Multiple Stream Tube Model, IJETT International Journal of Mechanical Engineering 4(6) (2017) 41-45
[8] I. Zaman, M.M. Salleh, B. Manshoor, A. Khalid and S. Araby, The Application of Multiple Vibration Neutralizers for Vibration Control in Aircraft, Applied Mechanics and Materials 629 (2014) 191-196.
[9] S.G. Zuo, H.U. Qing, H.J. Han, Influence of Blade Thickness on Regenerative Blower’s Blade Noise, Journal of Vibration and Shock 33(8) (2014) 130-147.
[10] G. Grasso, J. Christophe, C. Schram, Influence of the Noise Prediction Model on the Aeroacoustic Optimization of a Contra- Rotating Fan. Proceedings of the 20th AIAA/CEAS Aeroacoustics Conference, 2014.
[11] C. Polacsek and R. Barrier, Numerical Simulation of Counter- Rotating Fan Aeroacoustics. AIAA Paper, 2007.
[12] C.X. Li, Q. Lin, X.L. Ding, Performance, Aeroacoustics and Feature Extraction Of An Axial Flow Fan With Abnormal Blade Angle, Energy 103 (2016) 322-339.
[13] J. Wu, Z. Kou, and J. Liu, The Acoustical Behavior of Contra- Rotating Fan, Math. Probl. Eng. 2018 (2018) 3739067.
[14] A. Khalid, et al. Computational Fluid Dynamics Analysis of High Injection Pressure Blended Biodiesel, IOP Conference Series: Materials Science and Engineering 226 (2017) 012002.
[15] Y. Wang, W. Chen, H. Wang, and R. Li, A Computational Study on the Aerodynamics of a 90 mm Ducted Contra-Rotating Lift Fan, Sch. Power Energy, Univ. Northwest. Polytech. Univ, (2016) 126–133.
[16] Y. Wu and D. Huang, Optimization Design of Axial Fan Blade, J. Chinese Inst. Eng. Trans. Chinese Inst. Eng. A, 42(6) (2019) 473–47.
[17] X. Wang, S. Bushan, B. Manshoor, E. Luke, A. Sescu, Y. Hattori, D. Thompson and K. Walters, Dynamic Hybrid RANS/LES Assessment of Sound Generation and Propagation from Flow over a Circular Cylinder, In 2018 AIAA/CEAS Aeroacoustics Conference, AIAA AVIATION Forum, (AIAA 2018-3592), 2018.