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Analysis of Pulsation Inside Pipe and Study on Exhaust Sound Characteristics of V Type 8 Cylinder Engine - Study on Optimized Front Pipe Junction Structure
Technical Paper
1999-01-1651
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The research of pulsation wave propagation inside exhaust pipe installed in V8 engine shows that pulsation from engine was changed by joining two front pipes in entire exhaust pipe. In short, frequency of pulsation inside the pipe is not always equal to engine explosion first order frequency or its harmonics. Accordingly, structure of junction has been studied, which indicated that having volume at junction add engine revolution first order component pressure fluctuation to blow-down wave component and makes exhaust sound worse. This phenomena is caused by irregular explosion interval on each bank of V8 engine and phase delay of propagation at junction.
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Hosomi, M., "Analysis of Pulsation Inside Pipe and Study on Exhaust Sound Characteristics of V Type 8 Cylinder Engine - Study on Optimized Front Pipe Junction Structure," SAE Technical Paper 1999-01-1651, 1999, https://doi.org/10.4271/1999-01-1651.Also In
References
- Flamang, P. et al. “Experimental theoretical analysis of the flow in exhaust pipe junction” IMechE 1989
- Katayama, T. et al. “An estimation of method for acoustic characteristics of muffler” Toyota Tech. 41 1991
- Hosomi, M. et al. “Optimization of Exhaust Pipe Muffling Performance by Sound Pressure Modal Analysis” FISITA '96 1996
- Tanaka, T. et al. “Analysis of a Three Dimensional Sound Field by Using The Boundary Element Method” Transaction of The Japan Society of Mechanical Engineers(c) 53 491 1987
- Morel, T. Morel, J. Blaser, D. A. “Fluid Dynamic and Acoustic Modeling of Concentric-Tube Resonators/Silencers” SAE paper 910072 1991 Desantes, J. M.
- Torregrosa, A. J. et al. “Hybrid Linear/Nonlinear Method for Exhaust Noise Prediction” SAE paper 950545 1995
- Isshiki, Y. Shimamoto, Y. Wakisaka, T. “Simultaneous Prediction of Pressure Losses and Acoustic Characteristics in Silencers by Numerical Simulation” SAE paper 960637 1996
- Selamet A. et al. “The effect of vehicle exhaust system components on flow losses and noise in firing spark-ignition engines” SAE paper 951260 1995