A schlieren study of combustion in a rapid compression machine simulating the spark ignition engine

1979 ◽  
Vol 17 (1) ◽  
pp. 1283-1294 ◽  
Author(s):  
Frederic A. Matekunas
Keyword(s):  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Rapid Compression Machine ◽  
Rapid Compression

scholarly journals Analysis of the possibilities to achieve adiabatization process of combustion surrounded by inactive gases in Rapid Compression Machine

2017 ◽  
Vol 168 (1) ◽  
pp. 27-31
Author(s):  
Wojciech CIEŚLIK ◽  
Ireneusz PIELECHA
Keyword(s):  
Combustion Process ◽  
Combustible Mixture ◽  
Spark Ignition Engine ◽  
Rapid Compression Machine ◽  
Working Medium ◽  
Main Injection ◽  
Rapid Compression ◽  
Combustible Gases ◽  
Combustion Processes ◽  
Combustible Mixtures

In this work non-combustible gases impact on combustion processes studies is performed. Research was performed in a optically accessible rapid compression machine (RCM) under spark ignition engine conditions. The distribution of the swirl charge in the relation to adopted for analysis sequence of gas delivery to the chamber was varied with regard to the main injection. Authors investigate the influence of these sequence on the combustion and the ignition delay of the main injection and the overall combustion characteristics. The aim of this work is the experimental recognition of possibilities of creating combustible mixtures of light hydrocarbon fuels surrounded by non-combustible gases affecting the function of the inhibitor. Specifying the ability of preparation and combustion of mixtures in such systems enables the scientific analysis of adiabatization of the combustion process of fuel-air mixtures in the operating chambers. Theoretical analysis of the issues indicates possibility of obtaining such a stratification of the charge, that the inactive exhaust gases creating the outer ring surround the combustible mixture inside in such a way as to reduce the amount of heat exchanged between the working medium and the walls of the cylinder.

A rapid compression machine study of autoignition, spark-ignition and flame propagation characteristics of H2/CH4/CO/air mixtures

2018 ◽  
Vol 188 ◽  
pp. 150-161 ◽  
Author(s):  
Changpeng Liu ◽  
Heping Song ◽  
Peng Zhang ◽  
Zhi Wang ◽  
Margaret S Wooldridge ◽  
...  
Keyword(s):  
Flame Propagation ◽  
Spark Ignition ◽  
Rapid Compression Machine ◽  
Propagation Characteristics ◽  
Rapid Compression

scholarly journals A study of soot formation in a rapid compression machine at conditions representative of cold-fast-idle in spark ignition engines

2018 ◽  
Vol 20 (6) ◽  
pp. 670-677
Author(s):  
Justin E Ketterer ◽  
Wai K Cheng
Keyword(s):  
Soot Formation ◽  
Direct Injection ◽  
Spark Ignition ◽  
Light Extinction ◽  
Spark Ignition Engines ◽  
Rapid Compression Machine ◽  
Direct Injection Engines ◽  
Aromatic Content ◽  
Homogeneous Combustion ◽  
Rapid Compression

The soot yield, defined as the ratio of the soot mass to the carbon mass in the fuel, for the homogeneous combustion of a rich fuel-air mixture has been measured in a rapid compression machine using the laser light extinction method. The temperature and pressure conditions are representative of those in spark-ignition direct-injection engines at cold-fast-idle. The fuels used are a certification gasoline (with 28% aromatic content) and a blend of the gasoline with toluene (the blend had 40% aromatic content by volume) so that the sensitivity of soot formation to the fuel aromatic content could be assessed. Beyond a threshold fuel equivalence ratio (ϕ) value, the soot yield increases exponentially with ϕ. The soot yield of the gasoline–toluene blend is four to six times higher than that of the gasoline. The soot yield decreases exponentially with temperature, by a factor of 0.58 for every 10 K increase in temperature. In the 657–695 K temperature range, the threshold ϕ value increases linearly from approximately 2.4 to 2.7, at a rate of 0.1 point per 10 K rise in temperature. This temperature dependence is insensitive to the charge density.

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