Dissertation > Excellent graduate degree dissertation topics show

Optimized Design of Structure for Exhaust System of Engine Based on Lightweight

Author: LiJianHua
Tutor: MaLi
School: Wuhan University of Technology
Course: Vehicle Engineering
Keywords: Exhaust System Structural Improvement CFX Fluid Structure Interaction Lightweight CFD
CLC: U464.134.4
Type: Master's thesis
Year: 2012
Downloads: 169
Quote: 0
Read: Download Dissertation


Firstly, the research background of exhaust system of automobile is introduced in this thesis. Combining with the development trend of exhaust and the enterprise’s actual requirements, the necessity and urgency as well as the main purpose and significances of the research are discussed. In a detailed analysis of study statuses of exhaust system at home and abroad, the principal contents of this thesis and research approach are put forward.Then, the overall structure of exhaust system is analyzed in brief. In addition, main construction members, structural features and working condition of exhaust system are introduced, especially for exhaust manifold, exhaust adapter and cover of the exhaust manifold. The connect relationship between them are also introduced.Afterwards, giving the main theory which may be used in this paper, established the rationale for it.According to the relevant parameter supplied by the enterprise, calculated the entry condition of the exhaust manifold by GT-Power, obtained the pressure curve, temperature curve and mass flow curve. Based on these curves, calculated temperature field of the front exhaust pipe, and its’thermal stress later.Next, improvement measure put forward after calculating the modal of whole exhaust system, that’s shorten the pipe’s length between front exhaust pipe and supercharger. After the improvement, the requirement of lightweight achieved.And then analyzed the modal for the cover of the exhaust manifold and heat shield, reduce the mass of the structure to the minimum with the first modal frequency not changed too much.The result shows that the cover of the exhaust manifold and heat shield reduce0.22kg and0.15kg, which as about29.8%and28.4%of each original structure.Finally, the effect of the lightweight is analyzed, though whole mass reduced not much, it takes a big rate on original structure. And because of affected effect, bigger benefit will be generated.All studies in this thesis combined lightweight and fluid structure interaction together on exhaust system improvement, a creative way to solve the problem of exhaust system design. Not only supplied some reference and basis, but also figure out enterprise’s practical problems. Providing practical tool for optimization of exhaust system as well as new idea and possible ways for exhaust system research, and have a fine practical significance.

Related Dissertations

  1. Numerical Simulation of SNCR Process of a 600MW Utility Boiler,TK222
  2. Numerical Simulation and Contrastive Analysis of Labyrinth Seals and Leaf Seals,TK263.2
  3. Physically Based Real-Time Fluid Simulation Technique,TP391.41
  4. Lightweight Aggregate Made from Waste Residue of Construction、Reclamation of Waste Foundry Sand Dust and Sludge,TU528.042
  5. A Study of Excellent Lightweight Lifters (Group A) Intermediate Physical Selection Model,G884
  6. Research on Structural Vibration of Steam Piping System,TK284.1
  7. Adult OSAHS Preoperative and Postoperative Nasal and Pharynx Cavity and Soft Palate of the Numerical Analysis of Fluid-structure Interaction,R766
  8. Digital Simulation of Temperature in Modern Greenhouse,S625.51
  9. Study on the Characteristics and Simulation of the Hydrocyclone Reparation Process for Initial Rainwater,X522
  10. Guide the process of deceleration spin dynamics analysis sensitivity Projectile,TJ410
  11. Large range of water cannons Design and Research,TU998.13
  12. Study on Bubble Behaviors in Anode Channel of a Passive Direct Methanol Fuel Cell,TM911.4
  13. Design and Simulation of a tobacco flavoring feeding machine,TS43
  14. Based on Pro/E Reconstruct Sprinkler Structure and Investigations on Internal Flow Characteristic of the Sprinkler by Numerical Simulation and Experiment Methods,TP391.72
  15. The Stability Analysis of Earth-Rock Dam with Fluid-Structure Interaction Effect,TV641
  16. An Analysis on Energy Consumption of Large Spaces Air Condition System in Different Air Distribution,TU831
  17. Numerical Simulation of Flow and Mass Transfer in Tubular Electrochemical Reactor for Organic Wastewater Treatment,X703
  18. Numeration Simulation of the Flow Field in a Slurry Pump,TH311
  19. Research on Oil-Mist Flow Field’ Simulating and Lubrication Effects of the Bearing’s Cavity of Upper Back Up Roll,TH117.2
  20. An Investigation of the Frictional Pressure Drop of Air-Water Two-Phase Flow in Vertical Helicoidal Coiled Tube,TK172
  21. FEA of the Small Multi-function Chassis Frame and Its Lightweight Design,S223.91

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