This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Effects of Piston Bowl Diameter on Combustion Characteristics of a Natural gas/Diesel Dual Fuel Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published December 19, 2019 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Natural gas/diesel dual fuel engines have potential for a high thermal efficiency and low NOx emissions. However, they have the disadvantages of high unburned species emissions and lower thermal efficiencies at low loads (at low equivalence ratio). A way to solve this problem is to properly distribute the pilot fuel vapor in a natural-gas premixture. The combustion chamber geometry affects the combustion process since it influences the distribution of the pilot fuel vapor. This study investigates the influence of injection conditions and the piston bowl geometry on the performance and emissions of a dual fuel engine. Experiments were carried out using two pistons with different bowl diameters, 52 mm and 58 mm, at single-and two-stage diesel-fuel injection. The results show that the larger bowl provides lower hydrocarbon emissions at a lower equivalence ratio in the case of single-stage injection. For two-stage injection, the influence of the bowl diameter depends on the timing of the first injection. To elucidate the effects of pilot fuel distribution, computational fluid dynamics (CFD) calculations were conducted for non-reacting pilot fuel sprays under conditions equivalent to the experiments. As a result, the relative rich area of the pilot fuel in the case of the single injection in the large piston bowl do not impinge on the piston wall at the ignition timing of the experiment, which leads to higher heat release rate owing to the weak cooling effect.
CitationTakizawa, K., Tanaka, H., Horibe, N., Ishiyama, T. et al., "Effects of Piston Bowl Diameter on Combustion Characteristics of a Natural gas/Diesel Dual Fuel Engine," SAE Technical Paper 2019-01-2173, 2019, https://doi.org/10.4271/2019-01-2173.
Data Sets - Support Documents
|Unnamed Dataset 1|
|Unnamed Dataset 2|
|Unnamed Dataset 3|
|Unnamed Dataset 4|
|Unnamed Dataset 5|
- Fritz , S. and Egbuonu , R. Emissions from Heavy-Duty Trucks Converted to Compressed Natural Gas SAE Technical Paper No. 932950 1993
- Kusaka , J. , Okamoto , T. , Daisho , Y. , Kihara , R. , and Saito , T. Combustion and Exhaust Emissions Characteristics of a Diesel Engine Fueled with Natural Gas JSAE Review 21 4 489 496 2000
- Ishiyama , T. , Shioji , M. , Mitani , S. , Shibata , H. et al. Improvement of Performance and Exhaust Emissions in a Converted Dual-Fuel Natural Gas Engine SAE Technical Paper No. 2000-01-1866 2000
- Karim , G.A. An Examination of Some Measures for Improving the Performance of Gas Fuelled Diesel Engines at Light Load SAE Transactions 100 4 966 974 1991
- Tomita , E. , Kawahara , E. , Piao , Z. , and Yamaguchi , R. Effects of EGR and Early Injection of Diesel Fuel on Combustion Characteristics and Exhaust Emissions in a Methane Dual FuelEngine SAE Technical Paper No. 2002-01-2723 2002
- Aroonsrisopon , T. , Salad , M. , Wirojsakunchai , E. , Wannatong , K. et al. Injection Strategies for Operational Improvement of Diesel Dual Fuel Engines under Low Load Conditions SAE Technical Paper No. 2009-01-1855 2009
- Ishiyama , T. , Kang , J. , Ozawa , Y. , and Sako , T. Improvement of Performance and Reduction of Exhaust Emissions by Pilot-Fuel-Injection Control in a Lean-Burning Natural-Gas Dual-Fuel Engine SAE Int. J. Fuels Lubr. 5 1 243 253 2012
- Amir-Hasan , K. , Ali , N. , Babak , P. , and Amin P. Effects of piston bowl geometry on combustion and emissions characteristics of a natural gas/diesel RCCI engine Apllied Thermal Engineering 102 1462 1472 2016
- Kang , J. , Ozawa Y. , Ogata , T. , Ishiyama , T. , and Sako , T. Effects of Injection Conditions and Combustion Chamber Geometry on Performance Emissions of a Natural-Gas Dual Fuel Engine JSAE Transactions 43 2 473 478 2012
- Bao , Z. , Horibe , N. , and Ishiyama , T. A Study of Diesel Spray Characteristics for Small-Quantity Injection SAE Technical Paper 2018-01-0283 2018