Numerical Analysis of Ignition Control in HCCI Engine

2003 ◽  
Author(s):  
Ryo Hasegawa ◽  
Ichiro Sakata ◽  
Takashi Koyama ◽  
Hiromichi Yanagihara
Keyword(s):  
Numerical Analysis ◽  
Hcci Engine

A Numerical Analysis of the Effect of Mixture Heterogeneity on Combustion in an HCCI Engine

2004 ◽  
Vol 2004.3 (0) ◽  
pp. 77-78
Author(s):  
Katsuya SAIJYO ◽  
Takafumi KOJIMA ◽  
Kazuie NISHIWAKI
Keyword(s):  
Numerical Analysis ◽  
Hcci Engine

Experimental and numerical analysis of nitric oxide effect on the ignition of iso-octane in a single cylinder HCCI engine

2013 ◽  
Vol 160 (8) ◽  
pp. 1476-1483 ◽  
Author(s):  
Francesco Contino ◽  
Fabrice Foucher ◽  
Philippe Dagaut ◽  
Tommaso Lucchini ◽  
Gianluca D’Errico ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Numerical Analysis ◽  
Single Cylinder ◽  
Hcci Engine

Numerical Analysis of Biogas Composition Effects on Combustion Parameters and Emissions in Biogas Fueled HCCI Engines for Power Generation

2013 ◽  
Vol 135 (7) ◽  
Author(s):  
Iván D. Bedoya ◽  
Samveg Saxena ◽  
Francisco J. Cadavid ◽  
Robert W. Dibble
Keyword(s):  
Numerical Analysis ◽  
Power Output ◽  
Numerical Results ◽  
Combustion Stability ◽  
Absolute Pressure ◽  
Nox Emissions ◽  
Model Simulations ◽  
Hcci Engine ◽  
Hcci Combustion ◽  
Hcci Engines

This study investigates the effects of biogas composition on combustion stability for a purely biogas fueled homogeneous charge compression ignition (HCCI) engine. Biogas is one of the most promising renewable fuels for combined heat and power systems driven by internal combustion engines. However, the high content of CO2 in biogas composition leads to low thermal efficiencies in spark ignited and dual fuel compression ignited engines. The study is divided into two parts: First experimental results on a biogas-fueled HCCI engine are used to illustrate the effects of intake conditions on combustion stability, and second a simulation methodology is used to investigate how biogas composition impacts combustion stability at constant intake conditions. Experimental analysis of a four cylinder, 1.9 L Volkswagen TDI diesel engine shows that biogas-HCCI combustion exhibits high gross indicated mean effective pressure (close to 8 bar), high gross indicated efficiency (close to 45%), and ultralow NOx emissions below the US2010 limit (0.27 g/kWh). An inlet absolute pressure of 2 bar and inlet temperature of 473 K (200 °C) were required for allowing HCCI combustion with a biogas composition of 60% CH4 and 40% CO2 on a volumetric basis. However, slight changes in inlet pressure and temperature caused large changes in cycle-to-cycle variations at low equivalence ratios and large changes in ringing intensity at high equivalence ratios. Numerical analysis of biogas-HCCI combustion is carried out with a sequential methodology that includes one-zone model simulations, computational fluid dynamics (CFD) analysis, and 12-zones model simulations. Numerical results for varied biogas composition show that at high load limit, higher contents of CH4 in biogas composition allow advanced combustion and increased burning rates of the biogas air mixture. Higher contents of CO2 in biogas composition allow lowered ringing intensities with moderate decrease in the indicated efficiency and power output. NOx emissions are not highly affected by biogas composition, while CO and unburned hydrocarbons (HC) emissions tend to increase with higher contents of CO2. According with the numerical results, biogas composition is an effective strategy to control the onset of combustion and combustion phasing of HCCI engines running biogas, allowing more stabilized combustion at low equivalence ratios and safe operation at high equivalence ratios. The main advantages of using biogas-fueled HCCI engines in CHP systems are the low sensitivity of power output and indicated efficiency to biogas composition, as well as the ultralow NOx emissions achieved for all tested compositions.

Experimental and numerical analysis of the performance and exhaust gas emissions of a biogas/n-heptane fueled HCCI engine

Energy ◽  
2016 ◽  
Vol 115 ◽  
pp. 180-193 ◽  
Author(s):  
Darko Kozarac ◽  
Ivan Taritas ◽  
David Vuilleumier ◽  
Samveg Saxena ◽  
Robert W. Dibble
Keyword(s):  
Numerical Analysis ◽  
Exhaust Gas ◽  
Gas Emissions ◽  
Hcci Engine ◽  
Exhaust Gas Emissions
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