A skeletal mechanism (144 species) and a corresponding reduced mechanism (62 species) were developed on the basis of the most recent detailed n-heptane mechanism by Lawrence Livermore National Laboratories (LLNL, version 3.1, 2012) (Mehl et al., 2011, “Kinetic Modeling of Gasoline Surrogate Components and Mixtures Under Engine Conditions,” Proc. Combust. Inst., 33, pp. 193–200), in order to assess the mechanism's performance under various practical combustion conditions. These simplified mechanisms were constructed and validated under shock tube conditions. Three-dimensional computational fluid dynamics (3D CFD) simulations with both simplified mechanisms were conducted for the following modeling applications: ignition quality tester (IQT), diesel engine, and homogeneous charge compression ignition (HCCI) engine. In comparison with experimental data, the simulation results were found satisfactory under the diesel condition but inaccurate for both the IQT and HCCI conditions. For HCCI, the intake temperature used in the simulation had to be increased 30 K in order to be consistent with the engine data provided by Guo et al. (2010, “An Experimental and Modeling Study of HCCI Combustion Using n-Heptane,” ASME J. Eng. Gas Turbines Power, 132(2), 022801). Exploration of possible causes is conducted leading to the conclusion that refinement in the mechanism is needed for accurate prediction of combustion under IQT and HCCI conditions.
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December 2014
Research-Article
Validation of a Newly Developed n-Heptane Reduced Chemistry and Its Application to Simulations of Ignition Quality Tester, Diesel, and HCCI Combustion
Hsin-Luen Tsai,
Hsin-Luen Tsai
Department of Electronic Engineering,
Advanced Engine Research Center,
e-mail: hsinluen@gmail.com
Advanced Engine Research Center,
Kao Yuan University
,Kaohsiung, Taiwan
e-mail: hsinluen@gmail.com
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J.-Y. Chen,
J.-Y. Chen
Department of Mechanical Engineering,
e-mail: jychen@me.berkeley.edu
University of California at Berkeley
,Berkeley, CA 94720
e-mail: jychen@me.berkeley.edu
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Gregory T. Chin
Gregory T. Chin
Department of Mechanical Engineering,
e-mail: gchin@berkeley.edu
University of California at Berkeley
,Berkeley, CA 94720
e-mail: gchin@berkeley.edu
Search for other works by this author on:
Hsin-Luen Tsai
Department of Electronic Engineering,
Advanced Engine Research Center,
e-mail: hsinluen@gmail.com
Advanced Engine Research Center,
Kao Yuan University
,Kaohsiung, Taiwan
e-mail: hsinluen@gmail.com
J.-Y. Chen
Department of Mechanical Engineering,
e-mail: jychen@me.berkeley.edu
University of California at Berkeley
,Berkeley, CA 94720
e-mail: jychen@me.berkeley.edu
Gregory T. Chin
Department of Mechanical Engineering,
e-mail: gchin@berkeley.edu
University of California at Berkeley
,Berkeley, CA 94720
e-mail: gchin@berkeley.edu
Contributed by the Combustion and Fuels Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received October 16, 2013; final manuscript received June 18, 2014; published online July 15, 2014. Assoc. Editor: Stani Bohac.
J. Eng. Gas Turbines Power. Dec 2014, 136(12): 121505 (9 pages)
Published Online: July 15, 2014
Article history
Received:
October 16, 2013
Revision Received:
June 18, 2014
Citation
Tsai, H., Chen, J., and Chin, G. T. (July 15, 2014). "Validation of a Newly Developed n-Heptane Reduced Chemistry and Its Application to Simulations of Ignition Quality Tester, Diesel, and HCCI Combustion." ASME. J. Eng. Gas Turbines Power. December 2014; 136(12): 121505. https://doi.org/10.1115/1.4027891
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