This paper presents a numerical study on fuel injection, ignition, and combustion in a direct-injection natural gas (DING) engine with ignition assisted by a shielded glow plug (GP). The shield geometry is investigated by employing different sizes of elliptical shield opening and changing the position of the shield opening. The results simulated by KIVA-3V indicated that fuel ignition and combustion is very sensitive to the relative angle between the fuel injection and the shield opening, and the use of an elliptical opening for the glow plug shield can reduce ignition delay by 0.1–0.2 ms for several specific combinations of the injection angle and shield opening size, compared to a circular shield opening. In addition, the numerical results also revealed that the natural gas ignition and flame propagation will be delayed by lowering a circular shield opening from the fuel jet center plane, due to the blocking effect of the shield to the fuel mixture, and hence, it will reduce the DING engine performance by causing a longer ignition delay.
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September 2017
Research-Article
Numerical Studies of Glow Plug Shield on Natural Gas Ignition Characteristics in a Compression-Ignition Engine
Kang Pan,
Kang Pan
Department of Mechanical and
Industrial Engineering,
University of Toronto,
5 King’s College Road,
Toronto, ON M5S 3G8, Canada
e-mail: kangpan@mie.utoronto.ca
Industrial Engineering,
University of Toronto,
5 King’s College Road,
Toronto, ON M5S 3G8, Canada
e-mail: kangpan@mie.utoronto.ca
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James S. Wallace
James S. Wallace
Department of Mechanical and
Industrial Engineering,
University of Toronto,
5 King’s College Road,
Toronto, ON M5S 3G8, Canada
e-mail: wallace@mie.utoronto.ca
Industrial Engineering,
University of Toronto,
5 King’s College Road,
Toronto, ON M5S 3G8, Canada
e-mail: wallace@mie.utoronto.ca
Search for other works by this author on:
Kang Pan
Department of Mechanical and
Industrial Engineering,
University of Toronto,
5 King’s College Road,
Toronto, ON M5S 3G8, Canada
e-mail: kangpan@mie.utoronto.ca
Industrial Engineering,
University of Toronto,
5 King’s College Road,
Toronto, ON M5S 3G8, Canada
e-mail: kangpan@mie.utoronto.ca
James S. Wallace
Department of Mechanical and
Industrial Engineering,
University of Toronto,
5 King’s College Road,
Toronto, ON M5S 3G8, Canada
e-mail: wallace@mie.utoronto.ca
Industrial Engineering,
University of Toronto,
5 King’s College Road,
Toronto, ON M5S 3G8, Canada
e-mail: wallace@mie.utoronto.ca
1Corresponding author.
Contributed by the IC Engine Division of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received February 14, 2017; final manuscript received February 19, 2017; published online April 19, 2017. Editor: David Wisler.
J. Eng. Gas Turbines Power. Sep 2017, 139(9): 092806 (11 pages)
Published Online: April 19, 2017
Article history
Received:
February 14, 2017
Revised:
February 19, 2017
Citation
Pan, K., and Wallace, J. S. (April 19, 2017). "Numerical Studies of Glow Plug Shield on Natural Gas Ignition Characteristics in a Compression-Ignition Engine." ASME. J. Eng. Gas Turbines Power. September 2017; 139(9): 092806. https://doi.org/10.1115/1.4036293
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