Dissertation > Excellent graduate degree dissertation topics show

Experimental Study on Laser-induced Spark Ignition of CH4/O2/N2Mixture

Author: YuYang
Tutor: YuXin
School: Harbin Institute of Technology
Course: Physical Electronics
Keywords: laser induced spark ignition CH4/O2/N2gas metallic targets minimumignition energy and ignition delay time
CLC: TN249
Type: Master's thesis
Year: 2013
Downloads: 7
Quote: 0
Read: Download Dissertation

Abstract


In this era of non-renewable energy facing exhausted, increasing air pollutionas well as a higher demand on the performance of engines in more high-tech areas,how to enhance the combustion efficiency and ignition probability of a burner hasbeen a hot topic in combustion research. Compared with conventional ignitionmechanisms, laser induced spark ignition technique has been attracting lots ofinterest, due to its superior advantages, such as non-invasive ignition, precisioncontrollable ignition location and ignition time, multi-time ignition and multipointignition enabled.This work performed a fundamental study on the hotspots, such as theminimum ignition energy, ignition delay time and how to reduce the laser energyrequired for laser-induced spark ignition. First，we conducted experimental studyon the characterization of laser-induced spark ignition in CH4/O2/N2non premixedgas. A coaxial double quartz tube burner is utilized to simulate the real performanceof an engine, thus the characterizations of minimum ignition energy and ignitiondelay time of laser-induced spark ignition were obtained. Due to the fact that thenon-premixed gas flow is closer to the combustion chamber on application, the flowfield of mixed gas is very complex, thus the results had a low regularity, andhowever, initial explorations likewise is of great significance for further study.Secondly, in this paper, we employed laser-induced metal target spark ignitionmethod to reduce the laser energy required for laser-induced spark ignition. Theminimum laser energy required for laser-induced metal target spark ignition hasbeen reduced to3-5mJ and by over70%compared with the laser-induced sparkignition directly on CH4/O2/N2premixed gas. In addition, the ignition delay time isin the range of5001100μm, which is approximately equal to that of laserbreakdown method. This work confirmed the feasibility of reducing minimum laserenergy by the method of laser-induced metal target spark ignition, and it providedreliable references and experimental study for further study.

Related Dissertations

  1. The metal target MMW Fuze Signal Research and treatment,TN911.7
  2. Research and Design for the Laser’s Power Control System of Laser Direct Writing,TN249
  3. Several Key Issues on Closed-Loop Control for Precision Laser Tracking Device,TN249
  4. Research on Signal Receiving System of Phase Laser Range Finder,TN249
  5. The Experimental Study on CO2 Laser Processing of Glass,TN249
  6. Study on High Power Nd:YAG Laser Scanning Galvanometer System,TN249
  7. Study on the Target-In-the-Loop Adaptive Optics Systems,TN249
  8. Thermal Deformation of Coated Mirrors Irradiated by High Energy Laser,TN249
  9. Research of the Nonlinear Physical Process of the Interaction of Ultra-intense Laser Pulses with Thin Foils,TN249
  10. Technology Research on Laser Drilling by Fiber Laser Marker,TN249
  11. Development of the Distance Detection System on Laser Cutting Head and the Workpiece,TN249
  12. The Research on Mechanism of Dual-wavelength Short-pulse Laser Induced Damage on K9 Glass,TN249
  13. Application of Laser Induced Breakdown Spectroscopy in Composition Analysis of Poplar Leaves,TN249
  14. Design of the Laser Cluster Shooting Training System,TN249
  15. Study on Optical Axis Calibration Method of the Laser Receiving System Which Based on the Focal-plane Scanning,TN249
  16. Fabrication of Black Silicon by Femtosecond Laser for Solar Cells and Characteristic Analysis of Black Silicon,TN249
  17. Investigation on Optical Fiber Sensor Fabricated by Femtosecond Laser,TN249
  18. The Research of Digital Laser Scribed Line Key Technical,TN249
  19. Processing and application of three-dimensional point cloud data,TN249
  20. A Labview and Laser Doppler Technology Based Micro Displacement Measurement System and Its Applications,TN249
  21. Study on Different Preferred Orientation AlN Films Prepared by Pulsed Laser Deposition,TN249
  22. Base on Ground 3D Laser Scanning System of Scene Reconstruction and Related Applications,TN249

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Photonics technology,laser technology > Laser technology, the maser > Laser applications
© 2012 www.DissertationTopic.Net  Mobile