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A numerical study on the flow performance inside the straight pipe with perforated plates

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Abstract

A conventional car silencer is incorporated with several plates containing perforations for the deduction of sound waves from a car exhaust gases. Perforations in tubes or plates facilitate in developing a large variety of comprehensive models for sound attenuation. Exhaust gases passing through unimpeded straight perforated pipe forces the sound waves to dissipate the energy, thereby optimizing the performance and minimizing the back pressure exerted on the engine. On the other hand, the poorly designed perforation can deteriorate the engine performance by increasing the flow back pressure. Owing to the fact, in this work, the numerical model is based on the installation of the perforated plate with distinguishable hole sizes in a uniform circular pipe oriented normally to the mean gas flow direction. The essential function of the perforated plate is to route the gas flow in a non-uniform distribution of holes with various diameters and consequently, establishing the fully developed flow regime inside the pipe. The comprehensive description of flow performance according to the various perforated plate shapes are presented and compared to situations with no perforated plate. This work aims in demonstrating the importance of perforated plate by numerically investigating three different models, namely flat, convex and concave framed plates accomplished with pressure drop. Further, the study shows various flow characteristics associated with the velocity and turbulent intensity profiles as well as the flow uniformity depending on the perforated plates adopted. These results offer a practical guide to the best design of pipe with perforated plates.

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Authors and Affiliations

  1. Department of Aerospace Engineering, Chonbuk National University, Chonbuk, 561-756, Korea

    M. H. Jeong, S. K. Kumaresh & M. Y. Kim

  2. R&D Center, Technical Division, Korean Register, Busan, 46762, Korea

    C. Kim

Authors
  1. M. H. Jeong
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  2. S. K. Kumaresh
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  3. M. Y. Kim
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  4. C. Kim
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Corresponding author

Correspondence to M. Y. Kim.

Additional information

Recommended by Associate Editor Simon Song

Myeong Hee Jeong received her B.S. and M.S. in Aerospace Engineering from Chonbuk National University, Korea in 2013 and 2015, respectively. Presently, she is pursuing her Ph.D. course in Mechanical Engineering at Sungkyunkwan University in Suwon, Korea. She is interested in the fluid flow and heat transfer, computational numerical analysis, diesel aftertreatment systems, and fluid-structure interactions.

Selvakumar Kumaresh is the bachelor degree holder in Aeronautical Engineering from Kumaraguru College of Technology, India. Presently, he is pursuing his M.S. course in Aerospace Engineering at Chonbuk National University, Republic of Korea. His current research interests include catalytic combustor, surface chemical kinetics, gas turbine combustion and computational numerical analysis.

Man Young Kim received his B.S. degree in Mechanical Engineering from Pusan National University, Korea in 1992. He then took his M.S. and Ph.D. degrees in Aerospace Engineering from KAIST, Korea in 1994 and 1999, respectively. Since then, he worked for Powertrain R&D Center in Hyundai Motor Company as a Senior Researcher up to 2004. He is currently a faculty member in the Department of Aerospace Engineering at Chonbuk National University in Jeonju, Korea. He spent 1.5 years at Georgia Institute of Technology, USA as a Visiting Professor from 2009 to 2010. His research interests include propulsion and combustion, radiative heat transfer, radiation related combustion and heat transfer phenomena, and development of diesel aftertreatment systems such as DPF and SCR.

Chongmin Kim received him Ph.D. in Aerospace Engineering from Chonbuk National University, Korea in 2014. Presently, he is working as a Senior Researcher in Technical Division at KR (Korean Register) in Pusan, Korea. He is interested in the thermal fluidic design for marine engine, coolant, LNG and other facilities, especially, connection of thermal safety and interfaces between risk/safety assessment such as ship machinery and LNG infra (LNG fueled ship, LNG bunkering and relevant risk).

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Jeong, M.H., Kumaresh, S.K., Kim, M.Y. et al. A numerical study on the flow performance inside the straight pipe with perforated plates. J Mech Sci Technol 32, 3183–3189 (2018). https://doi.org/10.1007/s12206-018-0621-y

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  • DOI: https://doi.org/10.1007/s12206-018-0621-y

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