Dissertation > Excellent graduate degree dissertation topics show

Analysis and Research of the Engine Exhaust System Simulation

Author: GeXiaoGuang
Tutor: WuYiMin
School: Hebei University of Technology
Course: Mechanical Engineering
Keywords: engine exhaust system muffler simulation analysis FLUENT
CLC: U464.134.4
Type: Master's thesis
Year: 2011
Downloads: 92
Quote: 0
Read: Download Dissertation

Abstract


Recent years, noise pollution, caused by the rapid development of the automobile industry, is becoming a global issues. People pay close attention to some aspects such as the riding comfort at the same time. As an important factor to worsen the riding comfor, noise produced by the exhaust system must be strictly controled and attacts more and more attention.The exhaust noise produced by automobile engine is one of the main noise sources. Iinstallig an exhaust muffler is an effective way to reduce exhaust noise.In this paper, the contents include the basic theory of acoustics, the source of noise and methods of noise control, generating mechanism of automotive exhaust noise, type and evaluation index of automotive muffler. status and methods of the muffler research. From the analysis of the working principle of the muffler and the main indicators of its performance. We come to a conclusion of the muffler analysis with discrete numerical simulation.Finite volume method, a simulation based on the discrete numerical analysis, is the theoretical basis of acoustic software. about the simulation of the muffler, I choose the fluid simulational software FLUENT to do it, analyze the internal fields such as the flow field and the pressure field of the modling, generate the pressure loss curve, and evaluate the fluid performance of the muffler. Considering the requirements and indicators of the muffler. remodify the model, compare the remodified muffler to the original one. From the comparison, pressure loss of the model modified is lower than the original one. Flow field distribution is more uniform. The outer wall of noise power decrease.This prove the modification is reasonable and successful.

Related Dissertations

  1. Research on Developmental Strategies of Commercial Fitness Clubs in Nanning Based on SWOT Analysis,G80-05
  2. The Setting Bases of Working Pressure in LNG Systems and Orthogonal Experiment Design of Heat Exchangers,TQ051.5
  3. Quantitative Analysis of Pyrolysis Component of Typical Low Volatile Coal of Chinese,TQ530.2
  4. Study of Interaction between Epoxy Molecules and Carbon Fiber Surface with Molecular Simulation,TB332
  5. Research on Mechanism Analysis and Modeling Simulation of Horizontal Well Tractor,P631.83
  6. Research on the Mainframe System of Powder Mixed EDM and the Craft Experiment,TG661
  7. Study on Springback of High-Strength Steel Stamping,TG386
  8. Numerical Simulation and Experiment on Hydroforming of Cups with Controllable Radial Pressure,TG386
  9. Research on Technology and Mechanism of Joining Cemented Carbide to Carbon Steel,TG454
  10. Image Analysis System of Metal Transfer of Gas Metal Arc Welding,TG444
  11. EDM Electrode Wear Mechanism and Control Research,TG661
  12. The Effect of Composite Additive on the SNCR,X701
  13. The Brake Performance of Hydraulic Retarder and Simualtion Research on Its Application for Aircraft Arrestment,TH137.331
  14. Tooth Profile Modeling and Machining Error Analysis of the Face Gear,TH132.41
  15. Finite Element Analysis and Structure Optimal Design for Combined Seal at Normal Temperature and Low Temperature,TH136
  16. Error Analysis and Measurement Method Design for the Hemispherical Resonator Gyro,V241.5
  17. Satellite Attitude Determination Based on Gyro and Star Sensor,V448.2
  18. Pattern Classification of Combustion Modes in Scramjet,V235
  19. Numerical Simulation of Film Cooling in Turbine Cascade with Non-Axisymmetric Endwall Method,V231.3
  20. Research on Orbital Control Method for Space Rendezvous and Docking,V526
  21. Temperature Drift Modeling and Compensation of Fiber-Optic Gyroscopes,V241.5

CLC: > Transportation > Road transport > Automotive Engineering > Automotive engine > Reciprocating engine > Components, parts > Valve > Intake and exhaust systems
© 2012 www.DissertationTopic.Net  Mobile