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Realizing stratified mixtures distribution in a hydrogen-enriched gasoline Wankel engine by different compound intake methods
- Source :
- Energy Conversion and Management. 203:112230
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- This work aimed to realize stratified mixtures distribution in a hydrogen-enriched compound-intake gasoline Wankel engine by utilizing the difference of gas velocity from different intake ports. A three-dimension computational fluid dynamics (CFD) WRE model was established to investigate the mixture formation and combustion process under five different intake modes, i.e. the way of the binary fuel enters the combustion chamber through different intake ports (side intake port, peripheral intake port or both port). The intake mode S-HGP (the mixtures of H2, gasoline and air are in the peripheral intake port and pure air is in the side intake port) realized an optimal equivalence ratio distribution, in which condition, the most fuels gather near the spark plug and the minority fuel in the rear region of the combustion chamber. Since the unburned mixtures always exist in the rear region of the chamber due to the mainstream in the WRE, the stratified distribution of S-HGP could consume most of the fuel. Because the faster flame propagation release a large amount of heats near top dead center (TDC), S-HGP possesses the highest average in-cylinder pressure under five intake modes, is about 1.264 times than the worst intake mode. Moreover, S-HGP has the maximum average in-cylinder temperature, the ideal thermal condition and moderate lean combustion get the lowest CO emission, comparing with the intake mode performing the highest CO emissions, the CO emission of S-HGP is decreased by 745% near the exhaust valve opening timing (210 °CA ATDC). However, owing to the higher temperature inside cylinder, S-HGP has slightly high NO emission. In conclusion, the results mean that compound intake combined with intake modes control is an effective method for fuel distribution optimization besides the fuel direct injection.
- Subjects :
- Work (thermodynamics)
Hydrogen
Renewable Energy, Sustainability and the Environment
020209 energy
Wankel engine
Energy Engineering and Power Technology
chemistry.chemical_element
02 engineering and technology
Mechanics
Cylinder (engine)
law.invention
Fuel Technology
020401 chemical engineering
Nuclear Energy and Engineering
chemistry
law
Thermal
0202 electrical engineering, electronic engineering, information engineering
Environmental science
0204 chemical engineering
Combustion chamber
Gasoline
Spark plug
Subjects
Details
- ISSN :
- 01968904
- Volume :
- 203
- Database :
- OpenAIRE
- Journal :
- Energy Conversion and Management
- Accession number :
- edsair.doi...........41add606f1aa21bb502a68835c201bb2