This work explores the role of the ignition quality of a fumigated fuel on combustion phasing and brake thermal efficiency (BTE), which was investigated in a 2.5 l turbocharged common rail light-duty diesel engine. Different combinations of dimethyl ether (DME) and propane were fumigated into the intake air and displaced some of the directly injected ultralow sulfur diesel fuel (ULSD) needed to maintain the engine and a constant speed and load. Fumigation of DME and propane significantly increased BTE and reduced brake specific energy consumption (BSEC) compared to the baseline diesel condition with no fumigation. A mixture of 20% DME with 30% propane provided the maximum BTE, with 24% reduction in BSEC, however, at the expense of increasing peak cylinder pressure by 6 bar, which was even higher at greater DME substitutions. Fumigated DME auto-ignited early, ahead of top dead center (TDC), showing the typical low temperature heat release (LTHR) and high temperature heat release (HTHR) events and propane addition suppressed the early LTHR, shifting more of the DME heat release closer to TDC. Total hydrocarbon (THC) emissions increased, while NOx emissions reduced with increasing fumigation.
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April 2015
Research-Article
Experimental Studies of High Efficiency Combustion With Fumigation of Dimethyl Ether and Propane Into Diesel Engine Intake Air
Bhaskar Prabhakar,
Bhaskar Prabhakar
Department of Energy and Mineral Engineering,
e-mail: bhaskar.lp@gmail.com
The Pennsylvania State University
,University Park, PA 16802
e-mail: bhaskar.lp@gmail.com
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Srinivas Jayaraman,
Srinivas Jayaraman
Department of Industrial Engineering,
e-mail: srinivas.jayaraman03@gmail.com
The Pennsylvania State University
,University Park, PA 16802
e-mail: srinivas.jayaraman03@gmail.com
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Randy Vander Wal,
Randy Vander Wal
Department of Energy and Mineral Engineering,
e-mail: ruv12@psu.edu
The Pennsylvania State University
,University Park, PA 16802
e-mail: ruv12@psu.edu
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André Boehman
André Boehman
1
Department of Mechanical Engineering,
e-mail: boehman@umich.edu
University of Michigan
,Ann Arbor, MI 48109
e-mail: boehman@umich.edu
1Corresponding author.
Search for other works by this author on:
Bhaskar Prabhakar
Department of Energy and Mineral Engineering,
e-mail: bhaskar.lp@gmail.com
The Pennsylvania State University
,University Park, PA 16802
e-mail: bhaskar.lp@gmail.com
Srinivas Jayaraman
Department of Industrial Engineering,
e-mail: srinivas.jayaraman03@gmail.com
The Pennsylvania State University
,University Park, PA 16802
e-mail: srinivas.jayaraman03@gmail.com
Randy Vander Wal
Department of Energy and Mineral Engineering,
e-mail: ruv12@psu.edu
The Pennsylvania State University
,University Park, PA 16802
e-mail: ruv12@psu.edu
André Boehman
Department of Mechanical Engineering,
e-mail: boehman@umich.edu
University of Michigan
,Ann Arbor, MI 48109
e-mail: boehman@umich.edu
1Corresponding author.
Contributed by the Combustion and Fuels Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received May 27, 2014; final manuscript received June 8, 2014; published online November 11, 2014. Editor: David Wisler.
J. Eng. Gas Turbines Power. Apr 2015, 137(4): 041505 (9 pages)
Published Online: April 1, 2015
Article history
Received:
May 27, 2014
Revision Received:
June 8, 2014
Online:
November 11, 2014
Citation
Prabhakar, B., Jayaraman, S., Vander Wal, R., and Boehman, A. (April 1, 2015). "Experimental Studies of High Efficiency Combustion With Fumigation of Dimethyl Ether and Propane Into Diesel Engine Intake Air." ASME. J. Eng. Gas Turbines Power. April 2015; 137(4): 041505. https://doi.org/10.1115/1.4028616
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