Experimental Investigation of Cyclic Variation of Combustion Parameters in a Catalytically Activated Two Stroke SI Engine Combustion Chamber

1999 ◽  
Author(s):  
N. Nedunchezhian ◽  
S. Dhandapani
Keyword(s):  
Experimental Investigation ◽  
Combustion Chamber ◽  
Cyclic Variation ◽  
Si Engine ◽  
Engine Combustion

scholarly journals Influence of Chemical Composite Additive on Combustion and Emission Characteristics of a Diesel Engine using Waste Plastic Oil as Fuel and Modified Piston Bowl

2018 ◽  
Vol 34 (6) ◽  
pp. 2806-2813
Author(s):  
Pappula Bridjesh ◽  
Pitchaipillai Periyasamy ◽  
Narayanan Kannaiyan Geetha
Keyword(s):  
Experimental Investigation ◽  
Diesel Engine ◽  
Combustion Chamber ◽  
Emission Characteristics ◽  
Soy Lecithin ◽  
Physiochemical Properties ◽  
Waste Plastic ◽  
Piston Bowl ◽  
Waste Plastic Oil ◽  
Engine Combustion

This experimental investigation is an endeavour to substitute diesel with WPO as fuel on a diesel engine. Enhancing the physiochemical properties of WPO or with hardware modifications on the engine, the performance of engine could not be improved up to the mark. The physiochemical properties of WPO are enhanced by the use of composite additive, which is a mixture of soy lecithin and 2-ethylhexyl nitrate and to improve the in-cylinder air motion; subsequently to increase the swirl and turbulence, standard hemispherical combustion chamber is modified to toroidal spherical grooves combustion chamber. The results of combined effect of modifying the combustion chamber and addition of composite additive suggest that improvements in engine-out emissions can be obtained from current diesel engines by enhancing physiochemical properties of fuel and matching geometry of combustion chamber. Engine combustion and emission characteristics under various loads for various fuels under test are as well studied.

CFD Study of Heat Transfer in a Spark-Ignition Engine Combustion Chamber

2006 ◽  
Vol 129 (5) ◽  
pp. 609-616 ◽  
Author(s):  
A. R. Noori ◽  
M. Rashidi
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Temporal Variation ◽  
Combustion Chamber ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Si Engine ◽  
Engine Combustion

The objective of this study is the thermal investigation of a typical spark-ignition (SI) engine combustion chamber with particular focus in determination of the locations where the heat flux and heat transfer coefficient are highest. This subject is an important key for some design purposes especially thermal loading of the piston and cylinder head. To this end, CFD simulation using the KIVA-3V CFD code on a PC platform for flow, combustion, and heat transfer in a typical SI engine has been performed. Some results including the temporal variation of the area-averaged heat flux and heat transfer coefficient on the piston, combustion chamber, and cylinder wall are presented. Moreover, the temporal variation of the local heat transfer coefficient and heat flux along a centerline on the piston as well as a few locations on the combustion chamber wall are shown. The investigation reveals that during the combustion period, the heat flux and heat transfer coefficient vary substantially in space and time due to the transient nature of the flame propagation. For example, during the early stages of the flame impingement on the wall, the heat flux undergoes a rapid increase by as much as around 10 times the preimpingement level. In other words, the initial rise of the heat flux at any location is related to the time of the flame arrival at that location.

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