This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Simulation Research on the Combustion Characteristics of Lean-Burn Natural Gas Engine under Different Ignition Timings and Ignition Energies
Technical Paper
2017-24-0064
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
A CFD model of natural gas engine was established, and working process from intake stroke to combustion stroke was simulated in this paper. Based on the validation of CFD model through experimental method, the combustion characteristics of lean-burn natural gas engine are studied under different ignition timings and different ignition energies. Results indicate that, the in-cylinder indicated mean effective pressure increases with the ignition timing advancing from 22°CA BTDC to 32°CA BTDC at the same load level. Meanwhile, the heat release rate is increased by 23.18J/°CA and its peak phase is advanced by 9°CA. The peak pressure is also increased by 45.95% and its phase is advanced by 4.5°CA. On the other hand, when the ignition energy decreases from 91.97mJ to 33.1mJ at the same load level, the in-cylinder indicated mean effective pressure decreases. Moreover, the heat release rate is decreased by 15.18J/°CA and its peak phase is delayed by 6.5°CA, the peak pressure is decreased by 22.46% and its phase is delayed by 4.5°CA. The advancing ignition timing and increasing ignition energy enlarge the flame surface density and accelerate the burning rate at the same crank angle and lead to higher combustion intensity, so they are effective to shorten post-combustion period, and advantageous to improve the economy and dynamic performance of natural gas engine. However, due to faster combustion, the in-cylinder temperature raises, which results in slight increase of NO emission.
Authors
Topic
Citation
Song, E., Chu, S., Yang, L., and Liu, Z., "Simulation Research on the Combustion Characteristics of Lean-Burn Natural Gas Engine under Different Ignition Timings and Ignition Energies," SAE Technical Paper 2017-24-0064, 2017, https://doi.org/10.4271/2017-24-0064.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 | ||
Unnamed Dataset 3 | ||
Unnamed Dataset 4 | ||
Unnamed Dataset 5 | ||
Unnamed Dataset 6 | ||
Unnamed Dataset 7 | ||
Unnamed Dataset 8 | ||
Unnamed Dataset 9 |
Also In
References
- Wu C , Deng K , Wang Z The effect of combustion chamber shape on cylinder flow and lean combustion process in a large bore spark-ignition CNG engine[J] Journal of the Energy Institute 2015 89 2 240 247
- Zhang Q , Xu Z , Li M , Shao S. Combustion and emissions of a Euro VI heavy-duty natural gas engine using EGR and TWC[J] Journal of Natural Gas Science & Engineering 2016 28 7 660 671
- Kees V W , Nicolas S LNG-Engine Safety: Design of Protective Measures Using CFD[J] Chemical Engineering Transactions 2016 48 31 36
- Forte C , Bianchi G M , Corti E Validation of a Lagrangian Ignition Model in SI Engine Simulations[C] ASME 2010 Internal Combustion Engine Division Fall Technical Conference 2010 859 871
- Ma F , Liu H , Wang Y , Li Y et al. Combustion and emission characteristics of a port-injection HCNG engine under various ignition timings[J] International Journal of Hydrogen Energy 2008 33 2 816 822
- Liu Y F , Liu B , Liu L , Zeng K et al. Combustion characteristics and particulate emission in a natural-gas direct-injection engine: Effects of the injection timing and the spark timing [J] Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering 2010 224 8 1071 1080
- Polcyn , N. , Lai , M. , and Lee , P. Investigation of Ignition Energy with Visualization on a Spark Ignited Engine powered by CNG SAE Technical Paper 2014-01-1331 2014 10.4271/2014-01-1331
- Chen Q P , Shu H Y , Shi C H Test Study and Development of High Energy Direct Ignition System for Electronic Control CNG Engine [J] Advanced Materials Research 2011 201-203 610 613
- Madhav Rao Vendra C. , Wen J.X. , Tam V.H.Y. Numerical simulation of turbulent flame wall quenching using a coherent flame model J. Loss Prev. Process Ind. 26 2013 363 368
- Shen H , Hinze P C , Heywood J B A Model for Flame Initiation and Early Development in SI Engine and its Application to Cycle-to-Cycle Variations[C] International Fuels & Lubricants Meeting & Exposition 1994