Dissertation > Excellent graduate degree dissertation topics show

Research and Application of Eigenvector-based Methodology for Characterizing the In-cylinder Air Motion

Author: LvYong
Tutor: HuChunMing
School: Tianjin University
Course: Power Machinery and Engineering
Keywords: Novel steady-state flow rig eigenvector air flow inside the cylinder characterizing methodology optimization
CLC: U464.11
Type: Master's thesis
Year: 2012
Downloads: 19
Quote: 0
Read: Download Dissertation

Abstract


Energy consumption and environment pollution are the main problems for automotive industry. Thus, the improvement of the fuel economy and low emissions are the main objectives of the vehicle engines. Numerous advanced technologies are developed during these years to meet the emission regulation and consumer’s demands because they mostly have great industrial potential. However, the designing of the inlet port of the engine and optimizing the air flow inside the cylinder is a fundamental requirement for the development of the new combustion system or the performance improvement of the engine, so detailed knowledge of producing, optimizing, measuring and characterizing of the air flow inside the cylinder is indispensable for the vehicle engines.The new methodology for characterizing the inside the cylinder of the engine is mainly focused on in this research. The novel double eigenangle-based steady flow test rig has been developed, and the compositions, principle, working style and experimental process are expatiated and the data acquisition system is built up, too. Based on the double eigenangle-based steady-state flow test rig, the main work of this research is shown as follows:The new methodology for characterizing air flow inside the cylinder is established, and the concept of eigenvector, the eigenvector path of the in-cylinder air flow, the eigenvector table under different valve lifts are introduced in this paper to get a macroscopically reflection of the intensity, the tested plane, the vector direction and the distribution of the inclined swirl;A 4-valve PFI gasoline engine cylinder head was investigated comprehensively based on this novel test rig. The simulated and tested data were compared, and the accuracy, reliability and applicability of the new methodology mentioned above are validated;Based on the inlet port optimization of the PFI gasoline engine, a LPDI gasoline engine using air-assisted technology and spray guided direct injection combustion system was developed. The simulation model of the inlet ports was built up, and the simulated results were compared between PFI and LPDI engine on in-cylinder air flow. The novel double eigenangle-based steady-state flow test rig was used, and the concept of eigenvector, the eigenvector path of the in-cylinder tumble flow, the eigenvectors under different valve lifts were built to comprehensively investigate and contrast in-cylinder air flow of the two engines; besides, the results of the optimizing inlet port is analyzed and expatiated.

Related Dissertations

  1. Development of the Platform for Compressor Optimization Design and Aerodynamic Optimization Design in the Transonic Compressor,TH45
  2. Investigation of Turbine S2 Stream Surface Direct Problem Aerodynamic Optimization Design,V235.11
  3. Reseach on Optimal Control of Elevator Group Based upon Ant Colony Algorithm,TU857
  4. Research on High Efficiency Interior Permanent Magnet Synchronous Motor,TM341
  5. Application of Interior-Point Theory for Reactive Power Optimization in Large Power Systems,TM714.3
  6. The Basic Research of Axial Flux Inductor Type High Temperature Superconducting Motor,TM37
  7. The Optimization of AVS Video Decoder on the PC Platform and Improvement of Field Decoding,TN919.81
  8. Research on Stability of Hierarchical Sattellite Network,TN927.23
  9. Query Processing and Optimization in Massive Multi-Database Integration,TP311.13
  10. Research on Feature Extraction and Classification of Tongue Shape and Tooth-Marked Tongue in TCM Tongue Diagnosis,TP391.41
  11. Studies on Fermentation Optimization, Purification and Enzyme Characteristics of Lipase from Aspergillus Oryzae FS-1,TQ925.6
  12. Large the Hongshan iron ore mine personnel tracking positioning system optimization study,TN929.5
  13. Computing Minimum Distance between Curves/Surfaces Based on PSO Algorithm,O182
  14. Analysis of Nutritional Compositions and Quality of Shishen (Eremurus Chinensis Fedtsch.),S647
  15. 1 - deoxynojirimycin synthetic route design and process optimization,TQ463.5
  16. Optimization of Fermentation Conditions, Purification, Cloning and Expression of a Cold-active Lipase from Pseudomonas Sp.RT-1,TQ925
  17. Breeding of Fungal α-amylase High-producing Strain by Genome Shuffling,TQ925
  18. Hot air drying characteristics of lettuce osmotic dehydration mass transfer kinetics and permeability,TS255.52
  19. Study on Application of Red Yeast Rice in Fermented Sausage,TS251.65
  20. Domestication of Acidithiobacillus Ferroxidans and Its Application to Bio-desulfuration of Coal,X701.3
  21. Active Power Filter and Its Application in Distribution Network,TN713.8

CLC: > Transportation > Road transport > Automotive Engineering > Automotive engine > Reciprocating engine > Theory
© 2012 www.DissertationTopic.Net  Mobile