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Investigation of the Acoustic Surface Power on a Cooling Fan Using the Mesh Morpher Optimizer
Technical Paper
2019-01-0833
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A cooling fan is an essential device of the engine cooling system which is used to remove the heat generated inside the engine from the system. An essential element for successful fan designs is to evaluate the pressure over the fan blade since it can generate annoying noices, which have a negative impact on the fan’s performance and on the environment. Reducing the acoustic surface power will assist in building improved designs that comply with standards and regulations in achieving a more quiet environment. The usage of computational fluid dynamics (CFD), with support of mesh morphing, can provide simulation study for optimizing the shape of a fan blade to reduce the aeroacoustic effects. The investigation process will assist in examining and analyzing the acoustic performance of the prototype, impact of different parameters, and make a solid judgement about the model performance for improvement and optimization.
This paper proposes a new strategy in evaluating the pressure distribution over a fan blade. CFD techniques and optimization methodology were applied to improve the acoustic surface power distribution over a cooling fan’s blade. ANSYS Fluent was used to support this strategy to optimize the base model in combining the mesh morphing and the optimization techniques to provide a quick evaluation of the acoustic’s performance of the fan model. The Mesh Morpher Optimizer (MMO) in ANSYS Fluent was applied in conjunction with SIMPLEX and Powell’s broadband acoustic modeling. Consequently, the design process of a cooling fan with high performance can be reasonably practicable and fairly inexpensive. Also, this approach can be considered as one of the reasonable ways to reduce the design cost and time to leverage the total capital because time is a key factor in the manufacturing process. The surface acoustic power on the base model and end models using the SIMPLEX and Powell methods showed improvement on the performnace of cooling fan. The objective function with the SIMPLEX model was found to achieve faster convergence (less design stages) in comparison to the Powell’s model.
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Citation
Kheirallah, M., Jawad, B., Hermez, M., Liu, L. et al., "Investigation of the Acoustic Surface Power on a Cooling Fan Using the Mesh Morpher Optimizer," SAE Technical Paper 2019-01-0833, 2019, https://doi.org/10.4271/2019-01-0833.Also In
References
- Chanaud , R.C. and Muster , D. Aerodynamic Noise from Motor Vehicles The Journal of the Acoustical Society of America 58 1 31 38 1975
- Tsubota , H. 2007
- Lighthill , M.J. On Sound Generated Aerodynamically I Proceedings of the Royal Society of London, Series A211 1952 564 587
- Lighthill , M.J. On Sound Generated Aerodynamically II Proceedings of the Royal Society of London, Series A222 1 32 1954
- Ffowcs-Williams , J.E. and Hawkings , D.L. Sound Generation by Turbulence and Surfaces in Arbitrary Motion Proc. Royal Soc. London 264 321 342 1968
- Dowling , A.P. and Ffowcs Williams , J.E. Sound and Sources of Sound Chichester, UK Ellis Horwood Publishers 1983
- Neise , W. Review of Fan Noise Generation Mechanisms and Control Methods Fan Noise Symposium CETIM, France 1992 45 56
- Kim , S. et al. Computational Aeroacoustic Modeling of Open Fan and Comparison of Predicted and Experimental Noise Fields NOISE-CON Denver, CO August 26-28, 2013
- Curle , N. The Influence of Solid Boundaries upon Aerodynamic Sound Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences 231 505 514 1955
- The Boundary Layer Noise Source Model
- Broadband Noise Source Models
- I. ANSYS 2014
- Eggenspieler , G. 2012
- Kheirallah , M. , Jawad , B. , and Liu , L. Reducing the Acoustic Surface Power of a Cooling Fan Using the Mesh Morpher Optimizer SAE Technical Paper 2017-01-1610 2017 10.4271/2017-01-1610