This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Silencer Design Methodology for Motorsport Prototypes
Technical Paper
2019-36-0295
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
Exhaust silencer design in motorsport is a matter of establishing the best compromise between rules compliance, mass savings and engine restriction. A design methodology that acknowledges these difficulties is likely to be desirable to ensure that the best solution is always provided for the competing team. The present work takes into account a comprehensive analysis of mass versus silencer restriction matter, based on simulated lap times to find the optimal compromises. A thorough discussion concerning the different techniques concerning passive noise control is held, establishing a widely comprehensive concept study phase. Further optimisation of the best concept is conducted via Design of Experiments. A final finite element analysis is conducted in order to assess the quality of the proposed solution across a larger range of frequencies and confirm the design formulated so far as effective. Checking the transmission loss curve against the known sound power curve of the engine makes possible to know beforehand whether the design will comply with the applicable standards or not. Application of such methodology in a motorsports case has provided a prototype silencer that complies to noise standards. Noise testing conducted with Class A measurement devices provided readings of 107 dB(C), 3 units below the limit of 110 dB(C) while keeping engine restriction to a minimum. The final design imposes a peak power loss of only 4.5% (3.5 HP).
Authors
- Alexandre Piccini - Universidade Federal de Santa Maria, Brazil
- Paulo H. Mareze - Universidade Federal de Santa Maria, Brazil
- William D. Fonseca - Universidade Federal de Santa Maria, Brazil
- Cássio Freitas - Universidade Federal de Santa Maria, Brazil
- Felipe Balbom - Universidade Federal de Santa Maria, Brazil
- Mario E. S. Martins - Universidade Federal de Santa Maria, Brazil
Topic
Citation
Piccini, A., Mareze, P., Fonseca, W., Freitas, C. et al., "Silencer Design Methodology for Motorsport Prototypes," SAE Technical Paper 2019-36-0295, 2020, https://doi.org/10.4271/2019-36-0295.Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| Unnamed Dataset 1 | ||
| Unnamed Dataset 2 | ||
| Unnamed Dataset 3 | ||
| Unnamed Dataset 4 | ||
| Unnamed Dataset 5 | ||
| Unnamed Dataset 6 | ||
| Unnamed Dataset 7 | ||
| Unnamed Dataset 8 | ||
| Unnamed Dataset 9 |
Also In
References
- M. L. Munjal and V. Kumar Design and analysis of a plug-muffler modified for low back-pressure and improved acoustic performance SAE International India 2017
- M. D. Nora , T. D. M. Lanzanova , and H. Zhao Effects of valve timing, valve lift and exhaust backpressure on performance and gas exchanging of a two-stroke GDI engine with overhead valves Energy Conversion and Management 123 71 83 2016
- J. Vaz 2016
- J. Vaz , R. K. Martinuzzi , A. Machado , and M. Martins Design and manufacture of a Formula SAE variable intake manifold SAE Brasil 2016
- Gamma Technologies 2016
- S. of Automotive Engineers 2018
- L. L. Beranek ACOUSTICS: Sound fields, Transducers and Vibration 2019
- H. Aygun and K. Attenborough The insertion loss of perforated porous plates in a duct without and with mean air flow Applied Acoustics 69 6 506 513 2008
- M. L. Munjal Acoustics of ducts and mufflers 2014
- M. E. Delany and E. N. Bazley Report of the National Physical Laboratory - Aerodynamics division 1969
- Y. Miki Acoustical properties of porous materials - modifications of delany-bazley models Journal of the Acoustical Society of Japan 19 24 1990
- J. F. Allard and Y. Champoux New empirical equations for sound propagation in rigid frame fibrous materials Journal of the Acoustical Society of America 3346 3353 1991
- F. Ghanadi , M. Arjomandi , B. Cazzolato , and A. Zander Interaction of a flow-excited helmholtz resonator with a grazing turbulent boundary layer Experimental Thermal and Fluid Science 58 80 92 2014
- F. Ghanadi , M. Arjomandi , B. Cazzolato , and A. Zander Understanding of the flow behaviour on a helmholtz resonator excited by grazing flow International Journal of Computational Fluid Dynamics 28 5 219 231 2014
- M. Meissner Excitation of helmholtz resonator by grazing air flow Journal of Sound and Vibration 256 2 382 388 2002
- M. L. Munjal Acoustics of ducts and mufflers 1987
- D. A. Bies , C. H. Hansen , and C. Q. Howard Engineering noise control 2018
- C. Chu , H. Hua , and I. Liao Effects of three-dimensional modes on acoustic performance of reversal flow mufflers with rectangular cross-section Computers & Structures 2001
- A. R. D. Silva , P. H. Mareze , and A. Lenzi Approximate expressions for the reflection coefficient of ducts terminated by circular flanges Journal of the Brazilian Society of Mechanical Sciences and Engineering 34 2 2012
- C. Moore The role of shear layer instability waves in jet exhaust noise Journal of Fluid Mechanics 321 367 1977
- G. Lenzi , G. Ferrara , and A. Fioravanti Experimental Acoustic Characterization of Double-inlet and Single-Outlet Muffler SAE Technical Paper Series 2017
- D. Neihguk and S. Fulkar Acoustic Analysis of a Tractor Muffler SAE Technical Paper Series 2017
- C. Geuzaine and J.-F. Remacle Gmsh: A 3-D finite element mesh generator with built-in pre-and post-processing facilities International Journal for Numerical Methods in Engineering 79 11 1309 1331 2009
- Y.-W. Zhu , F.-W. Zhu , Y.-S. Zhang , and Q.-G. Wei The research on semi-active muffler device of controlling the exhaust pipes low-frequency noise Applied Acoustics 116 2017
- M. G. Prasad and M. J. Crocker A scheme to predict the sound pressure radiated from an automotive exhaust system The Journal of the Acoustical Society of America 70 5 1981