Project.pptx
- 1. DESIGN AND ANALYSIS OF AN AUTOMOBILE EXHAUST MUFFLER PRESENTED BY : ALWIN JOHNSON ABHIJITH SAJI ABHINANDHU M SOMAN ADITHYA BINU S7 AU AACET,THODUPUZHA GUIDED BY: MUHAMMAD SADIK N ASSISTANT PROFESSOR DEPT. OF AUTOMOBILE ENGG. AACET,THODUPUZHA AL-AZHAR COLLEGE OF ENGINEERING AND TECHNOLOGY DEPARTMENT OF AUTOMOBILE ENGINEERNIG
- 2. CONTENTS 1. Introdution 2. Literature Review 3. Objectives 4. Methodology
- 3. 1. Noise pollution is a big concern in today’s world, as excessive noise can be disruptive and harmful to our well-being. 2. The muffler plays a crucial role in reducing the noise generated by the engine as it travels through the exhaust system of a vehicle. 3. Achieving the balance between maximum noise reduction and minimal pressure drop can be challenging. 4. To address this, we utilize software to design and model a new muffler, taking into account various parameters for analysis. 5. By analyzing and adjusting the design parameters, we aim to create a muffler that provides optimal noise reduction while maintaining exhaust velocity and minimizing pressure drop. INTRODUCTION
- 4. LITERATURE REVIEW AUTHOR TITLE FINDINGS Tushar Sonkul DESIGN AND ANALYSIS OF REACTIVE MUFFLER FOR ENHANCEMENT IN TRANSMISSION LOSS (2021) 1. The muffler was analyzed using theory, simulations, and experiments. 2. Theoretical analysis used a MATLAB program based on empirical relations. 3. Simulations in COMSOL multiphysics analyzed the muffler in the frequency domain. Experimental analysis used two load methods. Results from simulations and experiments matched well.
- 5. AUTHOR TITLE FINDINGS Barhm Mohamad A HYBRID METHOD TECHNIQUE FOR DESIGN AND OPTIMISATION OF FORMULA RACE CAR EXHAUST MUFFLER(2020) 1. Using an Acoustic Metamaterial (AM) can further decrease the noise level in the muffler. 2. The results show that using AM in different areas, such as the inner and outer pipes, or inside the muffler, can help meet exhaust noise requirements. 3. The muffler reduces noise by converting airflow into heat energy in a closed space. Using 1D and 3D simulations can save time and cost when selecting the best muffler and exhaust pipe sizes.
- 6. AUTHOR TITLE FINDINGS Vinod Sherekar DESIGN PRINCIPLE OF AN AUTOMOBILE MUFFLER (2014) 1. Design Considerations: Mufflers must meet insertion loss, minimize backpressure, fit space constraints, be durable, lightweight, and cost- effective. 2. Multiple Solutions: Various design methods exist, leading to multiple solutions for specific situations. 3. Proven Performance: Muffler design’s effectiveness is validated through its performance in real automobile applications.
- 7. AUTHOR TITLE FINDINGS Sahil S Ambavane DESIGN AND THERMAL ANALYSIS OF VEHICLE EXHAUST MUFFLER(2021) 1• Maximum velocity in Single outlet exhaust muffler model for velocity inlet boundary condition is 88.616 m/s. 2• Maximum velocity in Double outlet exhaust muffler model for velocity inlet boundary condition is 188.69 m/s. 3• Exhaust pressure reduction in Single outlet exhaust muffler model is 4953.18
- 8. AUTHOR TITLE FINDINGS Ujjal Kalita DESIGN AND PERFORMANCE ESTIMATION OF AN AUTOMOBILE MUFFLER USING COMPUTATIONAL FLUID DYNAMICS ANALYSIS (2021) 1. Punching Rate Impact:Fang emphasized the importance of perforated pipe punching rate at constant inlet velocity, affecting muffler pressure loss. 2. Destructive Interference Concept: Shao introduced a concept using chambers with slits causing destructive interference, compared with traditional mufflers for noise attenuation and fuel consumption. 3. Sound Absorption Materials:Arenas and Crocker classified absorptive materials into cellular, fibrous, and granular types, highlighting micro-perforated panels as innovative sound absorbers.
- 9. AUTHOR TITLE FINDINGS Manpreet Singh STRUCTURE DESIGN OF A RADAR DISPLAY CONSOLE MUFFLER (2022) 1. Experimental Optimization:Pressure acoustic frequency domain analysis was used to optimize an existing reactive muffler. 2. Pilot Experiments: Number of baffles, position of baffle plates, and holes were finalized based on pilot experiments. 3. Taguchi’s DOE Methodology:L9 orthogonal array was used for nine trial experiments, with Taguchi’s methodology applied.
- 10. AUTHOR TITLE FINDINGS J. Aminuddin DESIGNING OF MUFFLER PART FOR Car EXHAUST SYSTEM WITH LOW EMISSION AND NOISE USING CONJUGATE GRADIENT METHOD (2020) 1. Method Used:Conjugate gradient method employed for designing muffler in big car’s exhaust system. 2. Objective: Optimization focused on reducing engine noise and emissions (roar and combustion-related). 3. Noise Reduction: Control of sound wave propagation in the tube to minimize interference noise.
- 11. AUTHOR TITLE FINDINGS Nilesh V. Kalyankar1 A CASE STUDY ON EXHAUST MUFFLER BACKPRESSURE OPTIMIZATION(2023) 1.Backpressure Significance: Backpressure greatly affects muffler performance and engine efficiency. 2.Negative Effects: Increased backpressure leads to problems like higher pumping work, reduced manifold pressure, and combustion issues. 3.Project Objective: Main goal is to reduce backpressure in the silencer for improved engine efficiency.
- 12. AUTHOR TITLE FINDINGS Liang Juan Zhang STRUCTURE DESIGN OF A RADAR DISPLAY CONSOLE MUFFLER(2023) 1.Muffler Design: Impedance compound muffler designed for radar display console. 2.Analysis Tools: Acoustic characteristics analyzed using CAD software FLUENT and COMSOL. 3.Heat Dissipation: Muffler has minimal impact on display console’s heat dissipation, confirmed through simulation.
- 13. AUTHOR TITLE FINDINGS Riziyamaalisa Gavit MUFFLER TRANSMISSION LOSS OPTIMIZATION FOR A VEHICLE USING GENETIC ALGORITHM(2021) 1.RMSTL Increase: Optimized muffler achieves 23.04dB RMSTL, 10.24% higher than the base muffler (20.9dB). 2.Diameter Variation: Diameter changes have minimal effect; reduction in inlet and outlet pipe length (-2.02%, -2.09%) significantly impacts RMSTL. 3.Expansion Chamber: Increasing chamber length and muffler pipe area enhances flow, aiding transmission loss.
- 14. AUTHOR TITLE FINDINGS B. MOHAMAD EXHAUST SYSTEM MUFFLER VOLUME OPTIMIZATION OF LIGHT COMMERCIAL PASSENGER CAR USING TRANSFER MATRIX METHOD(2019) 1.The reduction 15% of total volume of muffler provides considerably better TL values than the original size. 2.When the muffler size is reduced without changing the number of holes in inlet pipes and baffle position, the transmission loss increased from 55 dB to 60 dB. 3.The effect of existing mesh plate inside the chamber on transmission loss was slightly positive, replacing position of mesh plate doesn’t have any real effect on acoustic pressure level, and transmission loss.
- 15. AUTHOR TITLE FINDINGS Taipei Taiwan DESIGN AND CONTROL OF ACTIVE MUFFLER IN ENGINE EXHAUST SYSTEMS(2023) 1.Active Muffler Development: Active muffler with a control loudspeaker (45- degree inclination) developed for exhaust noise suppression. 2.Control Algorithms: Feedback ANC employed with FXLMS and Godart modified algorithms for controller tuning. 3.Experimental Results: FXLMS outperforms Godart, achieving over 6 dB reduction in engine exhaust noise, while Godart achieves 5 dB reduction.
- 16. AUTHOR TITLE FINDINGS Ajay Kashikar DEVELOPMENT OF MUFFLER DESIGN AND ITS VALIDATION (2017) 1. The study aimed to improve the transmission loss in a muffler by finding the best combination of factors. 2. They used a special approach and found that a certain combination of hole diameter, pipe diameter, pipe length, and AOP worked the best. 3. The modified muffler showed improved performance, with better acceleration and power in events like skid pad and auto-cross.
- 17. AUTHOR TITLE FINDINGS Manpreet Singh ACOUSTIC PERFORMANCE ANALYSIS OF MUFFLER BY VARYING SOUND ABSORPTION MATERIALS (2022) 1. They tested different materials and found that Glasswool was the most effective at reducing noise in the muffler. 2. Glasswool has high sound absorption properties, which helps to minimize exhaust system noise in cars. 3. It’s a great choice for mufflers because it effectively reduces noise and improves overall driving experience.
- 18. AUTHOR TITLE FINDINGS P. Srinivas DESIGN AND ANALYSIS OF AN AUTOMOBILE EXHAUST MUFFLER (2016) 1.Double expansion chamber in the muffler provides better results compared to a single expansion chamber, with a transmission loss of 42.48, which exceeds the requirement. 2. The muffler guard was designed and analyzed using SolidWorks software. 3. The muffler was properly modeled with accurate dimensions, and a dynamic analysis was conducted using CAE analysis to determine mode shapes, stresses, and deformations.
- 19. OBJECTIVES 1. Mufflers help limit the loud noise produced by the exhaust system, following regulations to protect the environment. 2. Mufflers aim to keep the noise inside the car at a level that customers find acceptable and enjoyable. 3. Mufflers play a role in reducing harmful emissions from the exhaust, meeting environmental norms. 4. Mufflers are designed to create a pleasant and cool tone for the car’s exhaust, enhancing the overall driving experience. 5. Mufflers that provide higher attenuation performance within the limited space and cost constraints of a vehicle.
- 20. METHODOLOGY 1. Problem Definition: - Define the project’s scope, objectives, and constraints. - Identify the target noise reduction and performance goals. 2. Literature Review: - Research existing exhaust muffler designs and noise reduction techniques. - Understand the relevant laws and regulations for noise emissions. 3. Data Collection: - Gather data on the specific vehicle and engine for which the muffler is intended. - Collect noise level measurements from the existing exhaust system. 4. Design Concept Development: - Brainstorm and create initial design concepts for the muffler. - Consider materials, shape, and internal components. 5. Computer-Aided Design (CAD): - Use CAD software to create detailed 3D models of the muffler designs. - Ensure compatibility with the vehicle’s undercarriage.
- 21. 6. Computational Fluid Dynamics (CFD) Analysis: - Perform CFD simulations to evaluate the muffler’s effect on exhaust flow. - Optimize the internal geometry for minimum backpressure. 7. Acoustic Simulation: - Use acoustic simulation software to predict noise reduction. - Analyze different designs for noise attenuation. 8. Material Selection: - Choose appropriate materials based on performance, cost, and durability. - Consider corrosion resistance for longevity. 9. Prototype Construction: - Build physical prototypes of the selected muffler designs. - Ensure that the prototypes are representative of the final product. 10. Experimental Testing: - Test the prototypes in controlled conditions to measure noise reduction and performance. - Collect data on backpressure, temperature, and noise levels. Contd….
- 22. 11. Data Analysis: - Analyze the test results to compare the different muffler designs. - Ensure that noise reduction and performance meet the set objectives. 12. Optimization: - Modify the design based on the test results and analysis. - Aim for an optimal balance between noise reduction and performance. 13. Cost Analysis: - Estimate the production costs of the final design. 14. Reporting and Documentation: - Create a comprehensive report summarizing the methodology, results, and recommendations. 15. Compliance and Certification: - Ensure that the muffler design complies with relevant noise regulations. - Obtain necessary certifications if applicable. Contd….
- 23. 16. Production and Implementation: - Prepare for mass production if the design meets all criteria. 17. Post-Implementation Testing: - Conduct further testing after mass production to verify consistency. 18. Maintenance and Improvement: - Continuously monitor and gather user feedback for potential improvements. Contd….
- 24. THANK YOU