This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Exhaust Noise Optimization for a Single Cylinder Engine by 1D - 3D CFD Coupled Simulation Approach
Technical Paper
2020-28-0369
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
Legislations on vehicular noise levels are becoming stringent day by day. Also the customer expectations on the vehicle noise levels has also become more refined in the India market. Intake and exhaust flow noise levels are one of the major contributors to this overall noise level of the vehicle. These drivers have led the Indian automobile manufacturers to focus on engine and vehicle noise optimization. The 3-wheeler and 4-wheeler Quadra-cycle vehicles which are powered by single cylinder engines are more prone to high noise levels due to pulsating intake and exhaust flow dynamics caused by single firing cylinder. The study focuses on the exhaust muffler design optimization of a single cylinder engine powertrain to meet the targeted noise levels.
One - Dimensional (1D) Simulation tools give significant information at the system level and reduce the time required for analysis and optimization compared to the three - dimensional (3D) CFD tools. Also, 3D CFD tools provides detailed information of the complex zones of the flow and are highly accurate in predicting the behaviour of the same. But the 3D tools incur high computational cost and time compared to 1D tools. So, to balance between the pros and cons of the above two, a 1D - 3D coupled simulation approach is introduced. In 1D - 3D coupled simulation, complex flow domains are modelled in 3D whereas the rest of the domain is modelled with 1D approach.
In this paper, muffler design of a single cylinder engine is optimized for lower noise levels and at the same time meeting the targets of back pressure and engine performance. A calibrated single cylinder 1D engine model is used where optimization of the muffler is first performed in 1D approach by running Design of Experiments (DoE) and then the optimized conditions are simulated in 1D-3D coupled simulation environment. Industry leading simulation tool GT-Suite along with Converge Lite is used for the simulation and analysis. Also, 1D simulation results are compared with the 1D-3D coupled simulation results to analyse the difference between the predicted noise levels.
Authors
Citation
Dhatkar, S., S K, R., Emran, A., THAKUR, S. et al., "Exhaust Noise Optimization for a Single Cylinder Engine by 1D - 3D CFD Coupled Simulation Approach," SAE Technical Paper 2020-28-0369, 2020, https://doi.org/10.4271/2020-28-0369.Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| [Unnamed Dataset 1] | ||
| [Unnamed Dataset 2] |
Also In
References
- Munjal, M.L. , Acoustics of Ducts and Mufflers Second Edition (Wiley Publications).
- Saunders, J., and Walker, P. , “Design and Development of a Novel Balancing System for Single and In-Line Twin Cylinder Engines,” SAE Technical Paper 2003-32-0026, 2003, https://doi.org/10.4271/2003-32-0026.
- Snyder, M., Lahti, J., and Moskwa, J. , “Simulating Transient Multi-Cylinder Engine Gas Exchange Dynamics on a Single-Cylinder Research Engine,” SAE Technical Paper 2006-01-1074, 2006, https://doi.org/10.4271/2006-01-1074.
- Shah, S., Kuppili, S., Hatti, K., and Thombare, D. , “A Practical Approach towards Muffler Design, Development and Prototype Validation,” SAE Technical Paper 2010-32-0021, 2010, https://doi.org/10.4271/2010-32-0021.
- Siano, D., and Bozza, F. , “Improving Acoustic Performance of an Air Filter Box. TL Analysis and Device Optimization,” SAE Technical Paper 2016-01-1813, 2016, https://doi.org/10.4271/2016-01-1813.
- Zhang, C., Hu, B., lai, C., Zhang, H. et al. , “Simulation Study of 1D-3D Coupling for Different Exhaust Manifold Geometry on a Turbocharged Gasoline Engine,” SAE Technical Paper 2018-01-0182, 2018, https://doi.org/10.4271/2018-01-0182.
- Krueger, J., Wink, P., Nicolai, M., and Westerhoff, B. , “Managing Increasing Exhaust System Variants for Passenger Vehicles,” SAE Technical Paper 2018-01-1557, 2018, https://doi.org/10.4271/2018-01-1557.
- Rauch, G., Lutz, J., Werner, M., Gurwara, S. et al. , “Synergetic 1D-3D-Coupling in Engine Development Part I: Verification of Concept,” SAE Technical Paper 2015-01-0341, 2015, https://doi.org/10.4271/2015-01-0341.
- Ramesh Shah, S., and GS, G. , “Muffler Design, Development and Validation for Acoustic Advantages on Automotive Vehicles,” SAE Technical Paper 2011-01-2215, 2011, https://doi.org/10.4271/2011-01-2215.