Effect of Mean Flow on the Transmission Loss of a Doubly Tuned Flow Reversal Muffler

Chetan Dayanand Gaonkar; Thappaganadoddi Nagabushnasharma Sreenivasa

doi:10.46604/aiti.2024.13620

Authors

Chetan Dayanand Gaonkar Department of Mechanical Engineering, VTU Belagavi, Karnataka, India/Department of Mechanical Engineering, Don Bosco College of Engineering, Goa, India
Thappaganadoddi Nagabushnasharma Sreenivasa Department of Mechanical Engineering, VTU Belagavi, Karnataka, India

DOI:

https://doi.org/10.46604/aiti.2024.13620

Keywords:

transmission loss, double tuning, flow reversal muffler, CFD, Mach number

Abstract

The same-end-inlet-outlet (SEIO) muffler, also referred to as a flow reversal muffler under flow conditions, features inlet and outlet pipes positioned on the same side of the chamber. Recently, a parametric expression has been developed to determine the end correction for double tuning of the SEIO muffler. This study extends the development of the SEIO muffler by experimentally validating the derived end correction expressions. Additionally, the tuning of the muffler is assessed with a mean flow using 3-D computational fluid dynamics, solving the linearized Navier-Stokes equation. This investigation explores the impact of flow conditions (Mach number 0.05 and 0.1) and temperature conditions (T = 733 K and 953 K) on the transmission loss (TL) of a doubly tuned muffler. The findings reveal that the muffler maintains its double tuning, even in the presence of mean flow at elevated temperatures, albeit with somewhat of a reduction in performance.

References

M. L. Munjal, Acoustics of Ducts and Mufflers, 2nd ed., Hoboken: Wiley, 2014.

P. Chaitanya and M. Munjal, “Tuning of the Extended Concentric Tube Resonators,” Indian Institute of Science, SAE Technical Paper 2011-26-0070, January 19, 2011.

E. Ramya and M. L. Munjal, “Improved Tuning of the Extended Concentric Tube Resonator for Wide-Band Transmission Loss,” Noise Control Engineering Journal, vol. 62, no. 4, pp. 252-263, July 2014.

P. Chaitanya and M. L. Munjal, “Effect of Wall Thickness on the End Corrections of the Extended Inlet and Outlet of a Double-Tuned Expansion Chamber,” Applied Acoustics, vol. 72, no. 1, pp. 65-70, January 2011.

C. D. Gaonkar, D. R. Rao, K. M. Kumar, and M. L. Munjal, “End Corrections for Double-Tuning of the Same-End Inlet-Outlet Muffler,” Applied Acoustics, vol. 159, article no. 107116, February 2020.

C. I. J. Young and M. J. Crocker, “Acoustical Analysis, Testing, and Design of Flow‐Reversing Muffler Chambers,” The Journal of the Acoustical Society of America, vol. 60, no. 5, pp. 1111-1118, November 1976.

J. G. Ih and B. H. Lee, “Theoretical Prediction of the Transmission Loss of Circular Reversing Chamber Mufflers,” Journal of Sound and Vibration, vol. 112, no. 2, pp. 261-272, January 1987.

A. Selamet and Z. L. Ji, “Acoustic Attenuation Performance of Circular Flow-Reversing Chambers,” The Journal of the Acoustical Society of America, vol. 104, no. 5, pp. 2867-2877, November 1998.

A. Mimani and M. L. Munjal, “Acoustic End-Correction in a Flow-Reversal End Chamber Muffler: A Semi-Analytical Approach,” Journal of Computational Acoustics, vol. 24, no. 02, article no. 1650004, June 2016.

V. B. Panicker and M. L. Munjal, “Aeroacoustics Analysis of Mufflers With Flow Reversals,” Journal of the Indian Institute of Science, vol. 63, no. 1, pp. 21-38, January 1981.

A. Broatch, X. Margot, A. Gil, and F. D. Denia, “A CFD Approach to the Computation of the Acoustic Response of Exhaust Mufflers,” Journal of Computational Acoustics, vol. 13, no. 02, pp. 301-316, June 2005.

H. Zhang, W. Fan, and L. X. Guo, “A CFD Results-Based Approach to Investigating Acoustic Attenuation Performance and Pressure Loss of Car Perforated Tube Silencers,” Applied Sciences, vol. 8, no. 4, article no. 545, April 2018.

H. Huang, Z. Chen, and Z. Ji, “One-Way Fluid-to-Acoustic Coupling Approach for Acoustic Attenuation Predictions of Perforated Silencers With Non-Uniform Flow,” Advances in Mechanical Engineering, vol. 11, no. 5, article no. 1687814019847066, May 2019.

L. Liu, X. Zheng, Z. Hao, and Y. Qiu, “A Time-Domain Simulation Method to Predict Insertion Loss of a Dissipative Muffler With Exhaust Flow,” Physics of Fluids, vol. 33, no. 6, article no. 067114, June 2021.

Z. He, Z. Ji, and H. Huang, “Acoustic Attenuation Prediction of Perforated Reactive and Dissipative Mufflers With Flow by Using Frequency-Domain Linearized Navier-Stokes Equations,” International Journal of Acoustics & Vibration, vol. 28, no. 4, pp. 394-402, December 2023.

H. Zhirong, J. Zhenlin, and F. Yiliang, “Acoustic Attenuation Prediction and Analysis of Perforated Hybrid Mufflers With Non-Uniform Flow Based on Frequency Domain Linearized Navier-Stokes Equations,” Advances in Mechanical Engineering, vol. 16, no. 1, article no. 16878132231226055, January 2024.

B. Mohamad, J. Karoly, A. Zelentsov, and S. Amroune, “Investigation of Perforated Tube Configuration Effect on the Performance of Exhaust Mufflers With Mean Flow Based on Three-Dimensional Analysis,” Archives of Acoustics, vol. 46, no. 3, pp. 561-566, 2021.

M. Bugaru and C. M. Vasile, “Recent Developments in Using a Modified Transfer Matrix Method for an Automotive Exhaust Muffler Design Based on Computation Fluid Dynamics in 3D,” Computation, vol. 12, no. 4, article no. 73, April 2024.

D. P. Jena and S. N. Panigrahi, “Numerically Estimating Acoustic Transmission Loss of a Reactive Muffler With and Without Mean Flow,” Measurement, vol. 109, pp. 168-186, October 2017.

COMSOL, “The CFD Module User’s Guide,” https://doc.comsol.com/6.2/doc/com.comsol.help.cfd/CFDModuleUsersGuide.pdf, December 14, 2023.

Z. He, Z. Ji, and H. Huang, “Acoustic Attenuation Analysis of Expansion Chamber Mufflers With Non-Uniform Cold and Hot Flow,” Journal of Sound and Vibration, vol. 568, article no. 118062, January 2024.

COMSOL, “The Acoustics Module User’s Guide,” https://doc.comsol.com/5.4/doc/com.comsol.help.aco/AcousticsModuleUsersGuide.pdf, December 14, 2023.

K. M. Kumar, C. D. Gaonkar, and M. L. Munjal, “Double-Tuning and Experimental Validation of Rotated-Offset Inlet-Outlet Circular Chamber Muffler,” Applied Acoustics, vol. 197, article no. 108948, August 2022.

C. D. Gaonkar and M. L. Munjal, “Theory of the Double-Tuned Side-Inlet Side-Outlet Muffler,” Noise Control Engineering Journal, vol. 66, no. 6, pp. 489-495, December 2018.

V. Sagar and M. L. Munjal, “Analysis and Design Guidelines for Fork Muffler With H-Connection,” Applied Acoustics, vol. 125, pp. 49-58, October 2017.

E. Selamet, A. Selamet, A. Iqbal, and H. Kim, “Effect of Flow on Helmholtz Resonator Acoustics: A Three-Dimensional Computational Study vs. Experiments,” The Ohio State University, SAE Technical Paper 2011-01-1521, May 17, 2011.