This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Experimental Study of Flame Accelerated Ignition on Rapid Compression Machine and Heavy Duty Engine
Technical Paper
2017-01-2242
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
A new ignition method named Flame Accelerated Ignition (FAI) is proposed in this paper. The FAI system composes of a spark plug and a flame acceleration tunnel with annular obstacles inside. The FAI was experimentally investigated on a rapid compression machine (RCM) with optical accessibility and a single-cylinder heavy duty research engine. In RCM, the flame is significantly accelerated and the combustion process is evidently enhanced by FAI. The ignition delay and the combustion duration are both sharply decreased compared with conventional spark ignition (CSI) case. According to the optical diagnostics, the flame rushes out of the exit of the flame acceleration tunnel at maximum axial speed over 40 m/s, which exceeds 10 times that of CSI flame propagation. In radial direction, the flame curls outwards near the tunnel exit and keeps growing afterwards. As a result, a cylindrical flame column is generated in the main-chamber, inducing the following combustion process completed rapidly. The results indicate the potential to increase thermal efficiency by FAI due to the accelerated flame and enhanced combustion. Experiments were conducted in the engine to validate the improvement potential on efficiency and emission performance. The FAI system with long tunnel failed to operate due to misfire caused by the unscavenged residual gas. A modified FAI system with shortened tunnel was designed and stably operated in the engine. Compared to CSI, the ignition delay is longer in FAI mode, which is different from the RCM result. However, the following heat release is still faster. Lower negative work and comparable combustion phase are achieved due to the accelerated combustion process and the enhanced heat release. The combustion efficiency is improved due to more complete combustion as the CO emissions are remarkably reduced. Moreover, the combustion stability is enhanced. As a result, both emission performance and thermal efficiency are improved.
Recommended Content
Authors
Citation
Wang, B., Wang, Z., Liu, C., Li, F. et al., "Experimental Study of Flame Accelerated Ignition on Rapid Compression Machine and Heavy Duty Engine," SAE Technical Paper 2017-01-2242, 2017, https://doi.org/10.4271/2017-01-2242.Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| [Unnamed Dataset 1] | ||
| [Unnamed Dataset 2] | ||
| [Unnamed Dataset 3] | ||
| [Unnamed Dataset 4] |
Also In
References
- Johnson, T. and Joshi, A., "Review of Vehicle Engine Efficiency and Emissions," SAE Technical Paper 2017-01-0907, 2017, doi:10.4271/2017-01-0907.
- Das, A. and Watson., H, C, "Development of a natural gas spark ignition engine for optimum performance," Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering. 211:361-378, 1997.
- Evans, R, L. and Blaszczyk., J, "A comparative study of the performance and exhaust emissions of a spark ignition engine fuelled by natural gas and gasoline," Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering. 211:39-47, 2005.
- Johnson, T., "Vehicular Emissions in Review," SAE Int. J. Engines 9(2):1258-1275, 2016, doi:10.4271/2016-01-0919.
- Toulson, E., Schock, H., and Attard, W., "A Review of Pre-Chamber Initiated Jet Ignition Combustion Systems," SAE Technical Paper 2010-01-2263, 2010, doi:10.4271/2010-01-2263.
- Shah, A., Tunestal, P., and Johansson, B., "Investigation of Performance and Emission Characteristics of a Heavy Duty Natural Gas Engine Operated with Pre-Chamber Spark Plug and Dilution with Excess Air and EGR," SAE Int. J. Engines 5(4):1790-1801, 2012, doi:10.4271/2012-01-1980.
- Takashima, Y., Tanaka, H., Sako, T., and Furutani, M., "Evaluation of Engine Performance and Combustion in Natural Gas Engine with Pre-Chamber Plug under Lean Burn Conditions," SAE Int. J. Engines 8(1):221-229, 2015, doi:10.4271/2014-32-0103.
- Attard, W., Blaxill, H., Anderson, E., and Litke, P., "Knock Limit Extension with a Gasoline Fueled Pre-Chamber Jet Igniter in a Modern Vehicle Powertrain," SAE Int. J. Engines 5(3):1201-1215, 2012, doi:10.4271/2012-01-1143.
- Anderson, E., Attard, W., Brown, A., Litke, P. et al., "Experimental Study of a Pre-Chamber Jet Igniter in a Turbocharged Rotax 914 Aircraft Engine," SAE Technical Paper 2013-01-1629, 2013, doi:10.4271/2013-01-1629.
- Attard, W., Fraser, N., Parsons, P., and Toulson, E., "A Turbulent Jet Ignition Pre-Chamber Combustion System for Large Fuel Economy Improvements in a Modern Vehicle Powertrain," SAE Int. J. Engines 3(2):20-37, 2010, doi:10.4271/2010-01-1457.
- Attard, W. and Blaxill, H., "A Single Fuel Pre-Chamber Jet Ignition Powertrain Achieving High Load, High Efficiency and Near Zero NOx Emissions," SAE Int. J. Engines 5(3):734-746, 2012, doi:10.4271/2011-01-2023.
- Attard, W. and Blaxill, H., "A Lean Burn Gasoline Fueled Pre-Chamber Jet Ignition Combustion System Achieving High Efficiency and Low NOx at Part Load," SAE Technical Paper 2012-01-1146, 2012, doi:10.4271/2012-01-1146.
- Attard, W. and Blaxill, H., "A Lean Burn Gasoline Fueled Pre-Chamber Jet Ignition Combustion System Achieving High Efficiency and Low NOx at Part Load," SAE Technical Paper 2012-01-1146, 2012, doi:10.4271/2012-01-1146.
- Attard, W., Toulson, E., Huisjen, A., Chen, X. et al., "Spark Ignition and Pre-Chamber Turbulent Jet Ignition Combustion Visualization," SAE Technical Paper 2012-01-0823, 2012, doi:10.4271/2012-01-0823.
- Silvestrini, M., Genova, B., Parisi, G., and Trujillo, F, J, L., "Flame acceleration and DDT run-up distance for smooth and obstacles filled tubes," Journal of Loss Prevention in the Process Industries. 21(5):555-562, 2008.
- Ciccarelli, G. and Dorofeev., S, "Flame acceleration and transition to detonation in ducts," Progress in Energy & Combustion Science. 34(4):499-550, 2008.
- Roy, G, D., Frolov, S, M., Borisov, A, A., and Netzer, D, W., "Pulse detonation propulsion: challenges, current status, and future perspective," Progress in Energy & Combustion Science. 30(6):545-672, 2004.
- Di, H., He, X., Zhang, P., Wang, Z. et al., "Effects of buffer gas composition on low temperature ignition of iso-octane and n-heptane," Combustion & Flame. 161(10):2531-2538, 2014.
- Wang, Z., Qi, Y., Xin, H., Wang, J. et al., "Analysis of pre-ignition to super-knock: hotspot-induced deflagration to detonation," Fuel. 144:222-227, 2015.
- Korakianitis, T., Namasivayam, A, M., and Crookes, R, J., "Natural-gas fueled spark-ignition (SI) and compression-ignition (CI) engine performance and emissions," Progress in Energy & Combustion Science. 37(1):89-112, 2011.