Ion current sensing is a low-cost technology that can provide a real-time feedback for the in-cylinder combustion process. The ion current signal depends on several design parameters of the sensing probe in addition to the operating conditions of the engine. To experimentally determine the effect of each of these parameters on the ion current signal, it requires modifications in the engine which would be costly and time consuming. A 3D computational fluid dynamics (CFD) model, coupled with a chemical kinetic solver, was developed to calculate the mole fraction of the ionized species formed in different zones in the fuel spray. A new approach of defining a number of virtual ion sensing probes was introduced to the model to determine the influence of sensor design and location relative to the spray axis on the signal characteristics. The contribution of the premixed and the mixing-diffusion controlled combustion was investigated. In addition, the crank angle resolved evolution of key ionization species produced during the combustion process was also compared at different engine operating conditions.
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October 2017
Research-Article
Three-Dimensional Computational Fluid Dynamics Modeling and Validation of Ion Current Sensor in a Gen-Set Diesel Engine Using Chemical Kinetic Mechanism
Tamer Badawy,
Tamer Badawy
Mem. ASME
Mechanical Department,
Wayne State University,
5050 Anthony Wayne Drive, Suite 2100,
Detroit, MI 48202
e-mail: eng.tam@gmail.com
Mechanical Department,
Wayne State University,
5050 Anthony Wayne Drive, Suite 2100,
Detroit, MI 48202
e-mail: eng.tam@gmail.com
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Naeim Henein
Naeim Henein
Mechanical Department,
Wayne State University,
5050 Anthony Wayne Drive, Suite 2100,
Detroit, MI 48202
e-mail: henein@eng.wayne.edu
Wayne State University,
5050 Anthony Wayne Drive, Suite 2100,
Detroit, MI 48202
e-mail: henein@eng.wayne.edu
Search for other works by this author on:
Tamer Badawy
Mem. ASME
Mechanical Department,
Wayne State University,
5050 Anthony Wayne Drive, Suite 2100,
Detroit, MI 48202
e-mail: eng.tam@gmail.com
Mechanical Department,
Wayne State University,
5050 Anthony Wayne Drive, Suite 2100,
Detroit, MI 48202
e-mail: eng.tam@gmail.com
Naeim Henein
Mechanical Department,
Wayne State University,
5050 Anthony Wayne Drive, Suite 2100,
Detroit, MI 48202
e-mail: henein@eng.wayne.edu
Wayne State University,
5050 Anthony Wayne Drive, Suite 2100,
Detroit, MI 48202
e-mail: henein@eng.wayne.edu
Contributed by the IC Engine Division of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received November 20, 2016; final manuscript received March 14, 2017; published online May 16, 2017. Assoc. Editor: David L.S. Hung.
J. Eng. Gas Turbines Power. Oct 2017, 139(10): 102810 (11 pages)
Published Online: May 16, 2017
Article history
Received:
November 20, 2016
Revised:
March 14, 2017
Citation
Badawy, T., and Henein, N. (May 16, 2017). "Three-Dimensional Computational Fluid Dynamics Modeling and Validation of Ion Current Sensor in a Gen-Set Diesel Engine Using Chemical Kinetic Mechanism." ASME. J. Eng. Gas Turbines Power. October 2017; 139(10): 102810. https://doi.org/10.1115/1.4036494
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