Niloofar

Improving the performance of double-expansion chamber muffler using dielectric beads; optimization using factorial design

• Authors Details :  
• Niloofar Damyar,  
• Fariba Mansouri,  
• Ali Khavanin,  
• Ahmad Jonidi Jafari,  
• Hassan Asilian-mahabadi,  
• Ramazan Mirzaei

Journal title : Journal of Environmental Health Science and Engineering

Publisher : Springer Science and Business Media LLC

Online ISSN : 2052-336X

Page Number : 1979-1985

Journal volume : 19

Journal issue : 2

227 Views Original Article

Purpose Noise pollution is a common health hazard worldwide which is emitted along with chemical air pollutants, simultaneously from many sources. Some studies have been conducted to control these pollutants, simultaneously with promising results being achieved. Dielectric beads have been used in air pollution control technologies, successfully and probable effectiveness of them in noise reduction can be promising in dual use of them in the exhausts emitting noise and air pollution, simultaneously. Methods In order to investigate the effectiveness of dielectric beads in noise reduction, two types of them; namely glass and ceramic beads, were placed separately inside the connecting tube of a double-expansion chamber muffler. Then the transmission loss (TL) of muffler was examined using impedance tube. A factorial design was used to evaluate and optimize the effect of noise related parameters on TL of such a system. Results Results show that the presence of dielectric beads has significant effect on TL of muffler. The maximum TL was obtained as 74.76 dB for muffler with ceramic beads, under the optimal condition of 5250 Hz and 120 dB. Measurement of TL and sound absorption coefficient (SAC) of glass and ceramic beads showed that the noise reduction in muffler with ceramic and glass beads is probably due to SAC in ceramic beads and noise reflections in glass beads, respectively. Conclusion These results promise the dual use of dielectric beads in the exhausts emitting noise and air pollution simultaneously.

Article DOI & Crossmark Data

DOI : https://doi.org/10.1007/s40201-021-00749-z

Article Subject Details

• Engineering
• Health sciences
• Mulltidisciplinary health science
• Public health

Article Keywords Details

• Dielectric beads
• Factorial design
• Muffler
• Noise

Article File

Full Text PDF

---

---

Article References

• (1). Jafari MJ, et al. Effects of noise on mental performance and annoyance considering task difficulty level and tone components of noise. J Environ Health Sci. 2019;17(1):353–65.
• (2). Alimohammadi I, et al. The effects of road traffic noise on mental performance. Iran J Environ Health Sci Eng. 2013;10(1):18.
• (3). Golmohammadi R, et al. Evaluation of the relation between noise exposure and occupational stress with unsafe acts and accidents in city bus drivers. Iran Occup Health. 2014;11(1):70–8.
• (4). Kan H, et al. Short-term association between sulfur dioxide and daily mortality: the Public Health and Air Pollution in Asia (PAPA) study. Environ Res. 2010;110(3):258–64.
• (5). van Thriel C, et al. Sensory and pulmonary effects of acute exposure to sulfur dioxide (SO2). Toxicol Lett. 2010;196(1):42–50.
• (6). Amster ED, et al. Contribution of nitrogen oxide and sulfur dioxide exposure from power plant emissions on respiratory symptom and disease prevalence. Environ Pollut. 2014;186:20–8.
• (7). Xu W, et al. Emission of sulfur dioxide from polyurethane foam and respiratory health effects. Environ Pollut. 2018;242:90–7.
• (8). Meng Z, Zhang B. Induction effects of sulfur dioxide inhalation on chromosomal aberrations in mouse bone marrow cells. Mutagenesis. 2002;17(3):215–7.
• (9). Meng Z, et al. DNA damaging effects of sulfur dioxide derivatives in cells from various organs of mice. Mutagenesis. 2004;19(6):465–8.
• (10). Norman K, Selamet A, Novak J. Perforated muffler manifold catalyst. J Sound Vib. 1998;218(4):711–34.
• (11). Marocco GM. Exhaust sound and emission control systems. 2009, Google Patents.
• (12). Hartjes S, Visser HG, Hebly SJ. Optimization of RNAV noise and emission abatement departure procedures. In 9th AIAA aviation technology, integration, and operations conference (ATIO) and aircraft noise and emissions reduction symposium (ANERS). 2009.
• (13). Chen Y, Lv L. Design and evaluation of an Integrated SCR and exhaust Muffler from marine diesels. J Mar Sci Technol. 2015;20(3):505–19.
• (14). Knight, G., Combined muffler and catalytic converter exhaust unit. 1991, Google Patents.
• (15). Chen HL, et al. Review of packed-bed plasma reactor for ozone generation and air pollution control. Ind Eng Chem Res. 2008;47(7):2122–30.
• (16). Nasonova A, et al. NO and SO2 removal in non-thermal plasma reactor packed with glass beads-TiO2 thin film coated by PCVD process. Chem Eng J. 2010;156(3):557–61.
• (17). Lundsager, C.B., Hollow ceramic pellets for catalyst support. 1975, Google Patents.
• (18). Damyar N, et al. Application of dielectric barrier discharge (DBD) plasma packed with glass and ceramic pellets for SO2 removal at ambient temperature: optimization and modeling using response surface methodology. Plasma Sci Technol. 2020;22(10):105501.
• (19). Damyar N, et al. Removal of sulfur dioxide from air using a packed-bed DBD plasma reactor (PBR) and in-plasma catalysis (IPC) hybrid system. Environ Sci Pollut Res. 2021;28:42821–428366.
• (20). Uddin MN, Rahman MA, Sir M. Reduce generators noise with better performance of a diesel generator set using modified absorption silencer. Glob J Res Eng. 2016;16(1-A).
• (21). Barron RF. Industrial noise control and acoustics. 2002: CRC Press.
• (22). Lamancusa J. The transmission loss of double expansion chamber mufflers with unequal size chambers. Appl Acoust. 1988;24(1):15–32.
• (23). Ingle R, et al. Experimental investigation of a double expansion chamber reactive muffler for stationary diesel engine. Noise Vib Worldw. 2014;45(9):12–7.
• (24). Pispola G, Horoshenkov KV, Asdrubali F. Transmission loss measurement of consolidated granular media (L). J Acoust Soc Am. 2005;117(5):2716–9.

---

More Article by Niloofar