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The Experimental Study on Ignition Mechanism and Combustion Characteristics of Micro Gas Engine

[+] Author Affiliations
Taian Ren

Xi’an Jiaotong University, Xi’an, China; Henan Mechanical and Electrical Engineering College, Xinxiang, China

Dejiang Lu, Zhuangde Jiang, Mingzhi Zhu

Xi’an Jiaotong University, Xi’an, China

Paper No. MNC2007-21072, pp. 741-745; 5 pages
  • 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems
  • First International Conference on Integration and Commercialization of Micro and Nanosystems, Parts A and B
  • Sanya, Hainan, China, January 10–13, 2007
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4265-7 | eISBN: 0-7918-3794-7
  • Copyright © 2007 by ASME


In this article, the experimental studies on ignition mechanisms and combustion characteristics of the micro combustor have been made for the designs and ignition of the combustor. A set of special experimental devices of ignition are designed and fabricated based on Si-based MEMS technology. The combustors of the experimental devices are the square cavity that varied from 1mm to 9mm in length and from 0.5mm to 4mm in height. The spark electrodes are Au electrodes. The gaps of electrodes are 10μm, 40μm, and 100μm. The experiments of the ignition mechanisms of premixed H2 /air, the concentration limit of ignition, residence time, ignitor-breakdown voltage, and heat transfer have been made on the devices. The ignition mechanisms and combustion characteristics of H2 /air in micro combustor have been discussed based on the results of experiments. The experimental results indicate that the ignition of the premixed H2 /air in micro combustor is feasible. The range of the ignitable concentration has a significant reduction. The combustion is subject to the back-fire and liable to suffer from flame extinction. The height is at least larger than 0.61mm. The ignitor-breakdown voltage is at least 350V when the gap of ignition electrodes is 10μm.

Copyright © 2007 by ASME



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