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Article Number - 70EDB3D48242


Vol.6(2), pp. 9-21 , October 2014
DOI: 10.5897/JMER2014.0333
ISSN: 2141-2383



Full Length Research Paper

Effects of fuel injection discharge curve and injection pressure on upgrading power and combustion parameters in heavy-duty (HD) diesel engine with computational fluid dynamics (CFD) simulation



Saeed Chamehsara
  • Saeed Chamehsara
  • Department of Mechanical Engineering, Malek-E-Ashtar University of Technology, Tehran, Iran
  • Google Scholar
Seyed Mostafa Mirsalim
  • Seyed Mostafa Mirsalim
  • Department of Mechanical Engineering, Amirkabir University of Technology, Tehran, Iran
  • Google Scholar
Mehdi Tajdari
  • Mehdi Tajdari
  • Department of Mechanical Engineering, Malek-E-Ashtar University of Technology, Tehran, Iran
  • Google Scholar







 Received: 21 August 2014  Accepted: 09 October 2014  Published: 31 October 2014

Copyright © 2014 Author(s) retain the copyright of this article.
This article is published under the terms of the Creative Commons Attribution License 4.0


In this study, the effects of fuel injection discharge curve and injection pressure onpower upgrade of heavy-duty diesel engine by simulation of combustion process in AVL-Fire software are discussed simultaneously. Hence, the fuel injection discharge curve is changed from semi-triangular to rectangular which is usual in common rail fuel injection system. Injection pressure with respect to amount of injected fuel and nozzle hole diameter are changed. Injection pressure is calculated by an experimental equation which is developed for heavy duty diesel engines with common rail fuel injection system. Power upgrade for 1000 and 2000 bar injection pressures are discussed. For 1000 bar injection pressure with 188 mg injected fuel and 3 mm nozzle hole diameter, power is upgraded about 19% in comparison to original state which is semi-triangular discharge curve with 139 mg injected fuel and 3 mm nozzle hole diameter, with no special change in cylinder pressure. On the other hand, both the NOX and the Soot emissions decreased about 30 and 6%, respectively. Compared with the original state, in the case of 2000 bar injection pressure, with injected fuel and nozzle diameter, 196 mg and 2.6 mm respectively, the power is upgraded about 22%, whereas cylinder pressure has been fixed, and the NOX and the Soot emissions are decreased to 36 and 20%, respectively.
 
Key words: Computational fluid dynamics (CFD) simulation, heavy-duty (HD) diesel engine, upgrading power, injection pressure, fuel injection discharge curve, combustion process.

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APA Chamehsara, S., Mirsalim, S. M., & Tajdari, M. (2014). Effects of fuel injection discharge curve and injection pressure on upgrading power and combustion parameters in heavy-duty (HD) diesel engine with computational fluid dynamics (CFD) simulation. Journal of Mechanical Engineering Research, 6(2), 9-21.
Chicago Saeed Chamehsara, Seyed Mostafa Mirsalim and Mehdi Tajdari. "Effects of fuel injection discharge curve and injection pressure on upgrading power and combustion parameters in heavy-duty (HD) diesel engine with computational fluid dynamics (CFD) simulation." Journal of Mechanical Engineering Research 6, no. 2 (2014): 9-21.
MLA Saeed Chamehsara, Seyed Mostafa Mirsalim and Mehdi Tajdari. "Effects of fuel injection discharge curve and injection pressure on upgrading power and combustion parameters in heavy-duty (HD) diesel engine with computational fluid dynamics (CFD) simulation." Journal of Mechanical Engineering Research 6.2 (2014): 9-21.
   
DOI 10.5897/JMER2014.0333
URL http://www.academicjournals.org/journal/JMER/article-abstract/70EDB3D48242

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