In-cylinder pressure-based combustion descriptors have been widely used for engine combustion control and spark advance scheduling. Although these combustion descriptors have been extensively studied for gasoline-fueled spark ignition (SI) engines, adequate literature is not available on use of alternative fuels in SI engines. In an attempt to partially address this gap, present work focuses on spark advance modeling of hydrogen-fueled SI engines based on combustion descriptors. In this study, two such combustion descriptors, namely, position of the pressure peak (PPP) and 50% mass fraction burned (MFB) have been used to evaluate the efficiency of the combustion. With a view to achieve this objective, numerical simulation of engine processes was carried out in computational fluid dynamics (CFD) software ANSYS fluent and simulation data were subsequently validated with the experimental results. In view of typical combustion characteristics of hydrogen fuel, spark advance plays a very crucial role in the system development. Based on these numerical simulation results, it was observed that the empirical rules used for combustion descriptors (PPP and 50% MFB) for the best spark advance in conventional gasoline fueled engines do not hold good for hydrogen engines. This work suggests revised empirical rules as: PPP is 8–9 deg after piston top dead center (ATDC) and position of 50% MFB is 0–1 deg ATDC for the maximum brake torque (MBT) conditions. This range may vary slightly with engine design but remains almost constant for a particular engine configuration. Furthermore, using these empirical rules, spark advance timings for the engine are presented for its working range.
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August 2018
Research-Article
Spark Advance Modeling of Hydrogen-Fueled Spark Ignition Engines Using Combustion Descriptors
Saket Verma,
Saket Verma
Engines and Unconventional Fuels Lab,
Centre for Energy Studies,
Indian Institute of Technology Delhi,
Block-V, Huaz Khas,
New Delhi 110016, India
e-mails: saketverma@hotmail.com;
ssaketverma@gmail.com
Centre for Energy Studies,
Indian Institute of Technology Delhi,
Block-V, Huaz Khas,
New Delhi 110016, India
e-mails: saketverma@hotmail.com;
ssaketverma@gmail.com
Search for other works by this author on:
L. M. Das
L. M. Das
Centre for Energy Studies,
Indian Institute of Technology Delhi,
Huaz Khas,
New Delhi 110016, India
Indian Institute of Technology Delhi,
Huaz Khas,
New Delhi 110016, India
Search for other works by this author on:
Saket Verma
Engines and Unconventional Fuels Lab,
Centre for Energy Studies,
Indian Institute of Technology Delhi,
Block-V, Huaz Khas,
New Delhi 110016, India
e-mails: saketverma@hotmail.com;
ssaketverma@gmail.com
Centre for Energy Studies,
Indian Institute of Technology Delhi,
Block-V, Huaz Khas,
New Delhi 110016, India
e-mails: saketverma@hotmail.com;
ssaketverma@gmail.com
L. M. Das
Centre for Energy Studies,
Indian Institute of Technology Delhi,
Huaz Khas,
New Delhi 110016, India
Indian Institute of Technology Delhi,
Huaz Khas,
New Delhi 110016, India
Contributed by the Combustion and Fuels Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received January 7, 2016; final manuscript received November 13, 2017; published online April 13, 2018. Assoc. Editor: Jeffrey Naber.
J. Eng. Gas Turbines Power. Aug 2018, 140(8): 081501 (11 pages)
Published Online: April 13, 2018
Article history
Received:
January 7, 2016
Revised:
November 13, 2017
Citation
Verma, S., and Das, L. M. (April 13, 2018). "Spark Advance Modeling of Hydrogen-Fueled Spark Ignition Engines Using Combustion Descriptors." ASME. J. Eng. Gas Turbines Power. August 2018; 140(8): 081501. https://doi.org/10.1115/1.4038798
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