Numerical investigation of the thermal and acoustic effect of material variations on the exhaust muffler

Year 2024, Volume: 13 Issue: 1, 33 - 44, 27.03.2024

Haydar Kepekçi , Mehmet Emin Ağca

https://doi.org/10.18245/ijaet.1407245

Abstract

Exhaust mufflers are used in automobiles to prevent the noise arising from exhaust gases resulting from internal combustion engines. With the advancement of the automotive industry, exhaust mufflers have become more complex over time to reduce noise and increase driving comfort. Within the scope of this study, exhaust muffler geometries with different geometries have been designed, and harmonic acoustic analyses have been carried out. In the analysis, the airflow speed has been accepted as 30 m/s. Acoustic pressure and transmission loss data obtained because of analyses performed with 1Pa pressure input have been evaluated. As a result of the evaluations, it has been concluded that the muffler modeled in a complex structure has been better acoustically. Although the main task of exhaust muffler is to reduce the sound level at the exit of exhaust gases, it is also important to reduce the temperature of the air in the exhaust system and have good thermal conductivity so as not to jeopardize the thermal safety of the system. For this reason, CFD thermal flow analysis has been carried out with 4 different materials using a complex design with high acoustic efficiency. Gray cast iron, stainless steel, 1020 steel, and aluminum have been used as materials. In this part of the study, it has been determined that the use of aluminum material has been better in terms of thermal efficiency.

Keywords

Exhaust silencer, Harmonic acoustic analysis, Thermal flow analysis, Computational fluid dynamics

Egzoz Susturucusu Malzeme Değişikliğinin Isıl ve Akustik Etkisinin Sayısal Olarak İncelenmesi

Abstract

Egzoz susturucuları otomobillerde içten yanmalı motorlardan kaynaklanan egzoz gazlarından kaynaklanan gürültüyü önlemek amacıyla kullanılmaktadır. Otomotiv sektörünün gelişmesiyle birlikte egzoz susturucuları gürültüyü azaltmak ve sürüş konforunu artırmak için zamanla daha karmaşık hale geldi. Bu çalışma kapsamında farklı geometrilere sahip egzoz susturucu geometrileri tasarlanmış ve harmonik akustik analizleri yapılmıştır. Analizde hava akış hızı 30 m/s olarak kabul edilmiştir. 1Pa basınç girişi ile yapılan analizler sonucunda elde edilen akustik basınç ve iletim kaybı verileri değerlendirilmiştir. Yapılan değerlendirmeler sonucunda karmaşık bir yapıda modellenen susturucunun akustik olarak daha iyi olduğu sonucuna varılmıştır. Egzoz susturucularının asıl görevi egzoz gazlarının çıkışındaki ses seviyesini azaltmak olsa da egzoz sistemindeki havanın sıcaklığını düşürmesi ve ısıl iletkenliğinin iyi olması da sistemin ısıl güvenliğini tehlikeye atmaması açısından önemlidir. sistem. Bu nedenle CFD termal akış analizi, akustik verimi yüksek, karmaşık bir tasarım kullanılarak 4 farklı malzeme ile gerçekleştirilmiştir. Malzeme olarak gri dökme demir, paslanmaz çelik, 1020 çelik ve alüminyum kullanılmıştır. Çalışmanın bu bölümünde alüminyum malzeme kullanımının ısıl verim açısından daha iyi olduğu tespit edilmiştir.

Keywords

Egzoz susturucusu, Harmonik akustik analiz, Termal akış analizi, Hesaplamalı akışkanlar dinamiği

References

• Musa N., Okegbile J., Owojaiye A., "Utilization of waste heat from exhaust gases of gasoline generator for water heating", Scientific Journal of Mehmet Akif Ersoy University, 2, 1, 1-6, 2019.
• Inoue Y, Kikuchi M., “Present and future trends of stainless steel for automotive exhaust system” Nippon Steel Technical Report, 88, 12-17, 2003.
• Farrauto R., Deeba M., Alerasool S., “Gasoline automobile catalysis and its historical journey to cleaner air”, Nature Catalysis, 2, 7, 603-613, 2019.
• Fu J., Zheng W., Xu M., Wang W., Huang Y., "Study on the influence of structure factors of diesel engine exhaust purification muffler on transmission loss in different frequency bands", Applied Acoustics, 180, 108147, 2021.
• Kelly O., Abdulsamad G., “Engineering material selection for automotive exhaust systems using CES software”, International Journal of Engineering Technologies, 3, 2, 50-60, 2017.
• Nelson K., Beierle E., “Exhaust system burn injuries in children”, Journal of pediatric surgery, 40, 4, 3-6, 2005.
• Das S., Mondal K., Ahmad A., Ali S., Faizan M., Ameen S., Pandey A., Vadiraja B., “A novel design for muffler chambers by incorporating baffle plate”, Applied Acoustics, 197, 108888, 2022.
• Kalita U., Singh M., “Acoustic performance analysis of muffler by varying sound absorption materials”, Materials Today Proceedings, 51, 362-370, 2023.
• Kalita U., Singh M., “Optimization of a reactive muffler used in four-cylinder petrol engine into hybrid muffler by using CFD analysis”, Materials Today Proceedings, 50, 1936–1945, 2022.
• Shi L., Xu W., Ma X., Wang X., Tian H., Shu G., “Thermal and acoustic performance of silencing heat exchanger for engine waste heat recovery”, Applied Thermal Engineering, 201, 117711, 2022.
• Kashikar A., Suryawanshi R., Sonone P., Thorat R., Savant S., “Development of muffler design and its validation”, Applied Acoustics, 180, 108132, 2021.
• Lu H., Wu T., Bai S., Xu K., Huang Y., Gao W., Chen L., “Experiment on thermal uniformity and pressure drop of exhaust heat exchanger for automotive thermoelectric generator”, Energy, 54, 372-377, 2013.
• Ayanso A., Goes P., Mehta K., "Range query estimation with data skewness for top-k retrieval", Decision Support Systems, 57, 258–273, 2014.
• Augasta M., Kathirvalavakumar T., "A new discretization algorithm based on range coefficient of dispersion and skewness for neural networks classifier", Applied Soft Computing, 12, 619–625, 2012.
• Jiang X., Zhou C., Su J., Jin G., Shen R., "Injection parameter design to improve the high-speed gear heat dissipation: CFD simulation and regression orthogonal experiment", Simulation Modelling Practice and Theory, 128, 102795, 2023.
• Chen J., Zheng Y., Zhang L., He G., Zou Y., Xiao Z., "Optimization of geometric parameters of hydraulic turbine runner in turbine mode based on the orthogonal test method and CFD", Energy Reports, 8, 14476–14487, 2022.
• Nazir M., Khan Z., Saeed A., Stokes K., "A predictive model for life assessment of automotive exhaust mufflers subject to internal corrosion failure due to exhaust gas condensation", Engineering Failure Analysis, 63, 43-60, 2016.
• Ujiro T., Kitazawa M., Togashi F., “Corrosion of muffler materials in automotive exhaust gas condensates”, Materials Performance, 33, 12, 171-183, 1994.
• Teng X., Pang J., Liu F., Zou C., Gao C., Li S., Zhang Z., “Fatigue strength optimization of gray cast iron processed by different austempering temperatures”, International Journal of Fatigue, 175, 107831, 2023.
• Szymański T., Olejnik E., Sobczak J., Szala M., Kurtyka P., Tokarski T., Janas A., "Dry sliding, slurry abrasion and cavitation erosion of composite layers reinforced by Ti-C fabricated in situ in cast steel and gray cast iron", Journal of Materials Processing Technology, 308, 117688, 2022.
• Darrigol O., “The acoustic origins of harmonic analysis”, Archive for history of exact Sciences, 61, 4, 343-424, 2007.
• Arjunan A., Wang C., Yahiaoui K., Mynors D, Morgan T., “Finite element acoustic analysis of a steel stud-based double-leaf wall”, Building and Environment, 67, 202-210, 2013.
• Shama K., Krishna A., Cholayya N., “Study of harmonics-to-noise ratio and critical-band energy spectrum of speech as acoustic indicators of laryngeal and voice pathology”, Journal on Advances in Signal Processing, 1, 1-9, 2007.
• Silva O., Serafim L., Mareze P., Fonseca W., Cardoso E., "Discrete approach for shape optimization of 2D time-harmonic acoustic radiation problems solved by BEM using the fully analytical adjoint method", Engineering Analysis with Boundary Elements, 156, 548-571, 2023.
• Terashima F., Lima K., Barbieri N., Barbieri R., Legat F., “Two-dimensional finite element approach to evaluate the sound transmission loss in perforated silencers”, Applied Acoustics, 192, 108694, 2022.
• Drant J., Micheau P., Berry A., "Active noise control in duct with a harmonic acoustic pneumatic source", Applied Acoustics, 176, 107860, 2021.
• Autrique J., Magoulès F., "Studies of an infinite element method for acoustical radiation", Applied Mathematical Modelling, 30, 7, 641-655, 2006.
• Kirkup S., "Computational solution of the acoustic field surrounding a baffled panel by the Rayleigh integral method", Applied Mathematical Modelling, 18, 7, 403-407, 1994.
• Tuozzo D., Silva M., Kulakauskas L., Vargas J., Lenzi A., "Time-harmonic analysis of acoustic pulsation in gas pipeline systems using the Finite Element Transfer Matrix Method: Theoretical aspects", Mechanical Systems and Signal Processing, 186, 1, 109824, 2023.
• Wang B., Sullivan L., Wood J., "Modeling wind-driven seed dispersal using a coupled Lagrangian particle tracking and 1-D 𝑘-𝜀 turbulence model", Ecological Modelling, 486, 110503, 2023.
• Kepekci H., "Investigation of the effect of the use of top deflectors on aerodynamic performance in vehicles with CFD analysis", International Journal of Automotive Engineering and Technologies, 12, 1, 44-50, 2023.
• Mohamed B., Karoly J., Zelentsov A., Amrouene S., "Investigation of Perforated Tube Configuration Effect on the Performance of Exhaust Mufflers with Mean Flow Based on Three-Dimensional Analysis", Archives of Acoustics, 46, 3, 561–566, 2021.
• Ibitoye S., Adegun I., Sanni Y., "Numerical Investigation of the Effect of Muffler Geometry on Engine Performance", Journal of Mechanical Engineering, 19, 1, 163-184, 2022.