This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Effective Methodology for Backpressure Prediction of Hot Exhaust Gas in Cold Flow Bench Test
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 05, 2016 by SAE International in United States
Annotation ability available
The numerical methodology is developed to estimate the backpressure value acquired from the cold flow bench into the hot flow conditions by equalizing various gas flow properties such as gas density and gas constant. The exhaust muffler geometry is adopted for virtual analysis. Computational Fluid Dynamics (CFD) modeling of the exhaust muffler in hot and cold flow conditions shows 60% of difference in back pressure values. The same muffler sample is tested in hot and cold flow test bench for back pressure on same measurement location used in CFD tool, the test result difference between these two conditions is obtained as 61%. By using derived 1D calculation, the cold flow back pressure results are extrapolated to generate hot flow back pressure values for the exhaust muffler system. These extrapolated values are then validated with the back pressure analysis results performed in both CFD and flow test bench using cold and hot flow conditions. The difference of back pressure gap between the cold and hot flow results are reduced to 5% and 4% respectively. The paper will discuss in detail the experimental procedures, data acquisition and data handling that were followed.
CitationRajadurai, S., Paulraj, M., and Victor, A., "Effective Methodology for Backpressure Prediction of Hot Exhaust Gas in Cold Flow Bench Test," SAE Technical Paper 2016-01-0196, 2016, https://doi.org/10.4271/2016-01-0196.
- Bennethum, J. and Winsor, R., "Toward Improved Diesel Fuel," SAE Technical Paper 912325, 1991, doi:10.4271/912325.
- Mondt, J., “Cleaner Cars: The History and Technology of Emission Control since the 1960s,” (Warrendale, Society of Automotive Engineers, Inc., 2000), doi:10.4271/R-226.
- Domkundwar, V.M., 2000. A Course in Internal Combustion Engine. Dhanpat Rai and CO. (P) Ltd.
- Mohiuddin A.K.M., Mohd Rashidin Ideres and Shukri Mohd Hashim., 2005. “Experimental Study of Noise and Backpressure for Silencer Design Characteristics” Journal of Applied Sciences 5(7): 1292-1298.
- Huang, L., 2004. Parametric study of a drum-like silencer. Journal of sound and vibration, Elsevier 269; 467-488.
- Cereda, S., BossÙ, R., Gambarotto, M., and Pazé, C., "1-D Modeling and Room Temperature Experimental Measurements of the Exhaust System Backpressure: Limits and Advantages in the Prediction of Backpressure," SAE Technical Paper 2008-01-0676, 2008, doi:10.4271/2008-01-0676.