A Study of Rich Flame Propagation in Gasoline SI Engine Based on 3-D Numerical Simulations

2011 ◽  
Author(s):  
Anand Gurupatham ◽  
Atsushi Teraji
Keyword(s):  
Numerical Simulations ◽  
Flame Propagation ◽  
Si Engine

scholarly journals Development of Flame Propagation Model for SI Engine and Its Application to Knoking Prediction

2005 ◽  
Vol 71 (710) ◽  
pp. 2581-2587
Author(s):  
Atsushi TERAJI ◽  
Tsuyoshi TSUDA ◽  
Toru NODA ◽  
Masaaki KUBO ◽  
Teruyuki ITOH
Keyword(s):  
Flame Propagation ◽  
Propagation Model ◽  
Si Engine

Numerical Simulation of a Spark Ignition Engine Using Liquid Fuels and Liquid Fuel Blends

2003 ◽  
Author(s):  
K. Majmudar ◽  
K. Aung
Keyword(s):  
Numerical Simulations ◽  
Liquid Fuel ◽  
Alternative Fuels ◽  
Current Model ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Liquid Fuels ◽  
Si Engine ◽  
Fuel Blends ◽  
Si Engines

The use of alternative fuels such as methanol and ethanol in spark-ignition (SI) engines is beneficial to the environment as it reduces emissions of pollutants such as NOx from these engines with slight penalty on the performance. This paper investigated the use of liquid fuel blends such as ethanol/gasoline blend in an SI engine by numerical simulations. The numerical simulations were based on the models of finite heat release, cylinder heat transfer, pumping losses, and friction losses. Simulations were carried out to evaluate the effects of compression ratio, equivalence ratio, ignition timing, and engine speed on the performance of the SI engine. The results of the simulations were compared with experimental data from the literature to validate the simulations. Good agreements between the computed and experimental results were obtained. The results showed that the current model could satisfactorily predict the performance of an SI engine fueled by liquid fuel blends.

scholarly journals Comparison of Flame Propagation Statistics Extracted from Direct Numerical Simulation Based on Simple and Detailed Chemistry—Part 1: Fundamental Flame Turbulence Interaction

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5548
Author(s):  
Felix Benjamin Keil ◽  
Marvin Amzehnhoff ◽  
Umair Ahmed ◽  
Nilanjan Chakraborty ◽  
Markus Klein
Keyword(s):  
Numerical Simulations ◽  
Flame Propagation ◽  
High Performance ◽  
Three Dimensional ◽  
Quantitative Agreement ◽  
Combustion Regime ◽  
Computing Methods ◽  
Direct Numerical Simulations ◽  
Tangential Strain ◽  
Detailed Chemistry

In the present study, flame propagation statistics from turbulent statistically planar premixed flames obtained from simple and detailed chemistry, three-dimensional Direct Numerical Simulations, were evaluated and compared to each other. To this end, a new database was established encompassing five different conditions on the turbulent premixed combustion regime diagram, using nearly identical numerical methods and the same initial and boundary conditions. A detailed discussion of the advantages and limitations of both approaches is provided, including the difference in carbon footprint for establishing the database. It is shown that displacement speed statistics and their interrelation with curvature and tangential strain rate are in very good qualitative and reasonably good quantitative agreement between simple and detailed chemistry Direct Numerical Simulations. Hence, it is concluded that simple chemistry simulations should retain their importance for future combustion research, and the environmental impact of high-performance computing methods should be carefully chosen in relation to the goals to be achieved.

Numerical Simulations of Turbulent Flame Propagation in a Fan-Stirred Combustion Bomb and Bunsen-Burner at Elevated Pressure

2020 ◽  
Author(s):  
Feichi Zhang ◽  
Thorsten Zirwes ◽  
Peter Habisreuther ◽  
Nikolaos Zarzalis ◽  
Henning Bockhorn ◽  
...  
Keyword(s):  
Numerical Simulations ◽  
Flame Propagation ◽  
Turbulent Flame ◽  
Elevated Pressure ◽  
Bunsen Burner

An Experimental Investigation of Early Flame Development in an Optical SI Engine Fueled With Natural Gas

2017 ◽  
Author(s):  
Cosmin E. Dumitrescu ◽  
Vishnu Padmanaban ◽  
Jinlong Liu
Keyword(s):  
Natural Gas ◽  
Flame Propagation ◽  
Turbulent Flame ◽  
The United States ◽  
Si Engine ◽  
Ic Engine ◽  
Piston Bowl ◽  
Pressure Trace ◽  
Flame Development ◽  
Flame Region

Improved internal combustion (IC) engine simulations of natural gas (NG) combustion under conventional and advanced combustion strategies have the potential to increase the use of NG in the transportation sector in the United States. This study focused on the physics of turbulent flame propagation. The experiments were performed in a single-cylinder heavy-duty compression-ignition (CI) optical engine with a bowl-in piston that was converted to spark ignition (SI) NG operation. The size and growth rate of the early flame from the start of combustion until the flame filled the camera field-of-view were correlated to combustion parameters determined from in-cylinder pressure data, under low-speed, lean-mixture, and medium-load conditions. Individual cycles showed evidence of turbulent flame wrinkling, but the cycle-averaged flame edge propagated almost circular in the 2D images recorded from below. More, the flame-speed data suggested a different flame propagation inside a bowl-in piston geometry compared to a typical SI engine chamber. For example, while the flame front propagated very fast inside the piston bowl, the corresponding mass fraction burn was small, which suggested a thick flame region. In addition, combustion images showed flame activity after the end of combustion inferred from the pressure trace. All these findings support the need for further investigations of flame propagation under conditions representative of CI engine geometries, such as those in this study.

scholarly journals Evaluation of the flame propagation within an SI engine using flame imaging and LES

2017 ◽  
Vol 21 (6) ◽  
pp. 1080-1113 ◽  
Author(s):  
Chao He ◽  
Guido Kuenne ◽  
Esra Yildar ◽  
Jeroen van Oijen ◽  
Francesca di Mare ◽  
...  
Keyword(s):  
Flame Propagation ◽  
Si Engine ◽  
Flame Imaging
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