Optimization of combustion chamber geometry and engine operating conditions for compression ignition engines fueled with dimethyl ether

Fuel ◽  
2012 ◽  
Vol 97 ◽  
pp. 61-71 ◽  
Author(s):  
Sungwook Park
Keyword(s):  
Combustion Chamber ◽  
Dimethyl Ether ◽  
Operating Conditions ◽  
Compression Ignition ◽  
Compression Ignition Engines

Heat Transfer in Compression-Ignition Engines: First Paper: Heat Transfer in a Quiescent Chamber Diesel Engine

1970 ◽  
Vol 185 (1) ◽  
pp. 963-975 ◽  
Author(s):  
N. D. Whitehouse
Keyword(s):  
Heat Transfer ◽  
Combustion Chamber ◽  
Realistic Model ◽  
Compression Ignition ◽  
Usual Model ◽  
Mean Values ◽  
Transfer Rates ◽  
Compression Ignition Engines ◽  
Instantaneous Values ◽  
The Mean

Instantaneous and mean values of heat transfer at various positions in the combustion chamber were obtained, by means of surface thermocouples, for different loads and speeds and compared with those obtained theoretically from synthesized cycle calculations. The results show that the usual model of homogeneity in the cylinder is inadequate for heat transfer calculations. Peak rates of heat transfer when in the vicinity of a fuel spray were comparatively little dependent upon load or speed. At the periphery of the combustion chamber the mean heat transfer rates were appreciably lower than to the cylinder head and piston and the rapid rise in instantaneous values occurred appreciably later. The results all suggest the need for a more realistic model based upon the geometry and penetration of the fuel sprays.

scholarly journals Assessment of the potential of dimethyl ether as an alternative fuel for compression ignition engines

2017 ◽  
Vol 169 (2) ◽  
pp. 181-186
Author(s):  
Rafał SMOLEC ◽  
Marek IDZIOR ◽  
Wojciech KARPIUK ◽  
Miłosław KOZAK
Keyword(s):  
Natural Resources ◽  
Crude Oil ◽  
Dimethyl Ether ◽  
Automotive Industry ◽  
Alternative Fuel ◽  
Exhaust Emissions ◽  
Combustion Engines ◽  
Compression Ignition ◽  
Compression Ignition Engines

The main problem that the automotive industry has been dealing with since the beginning of the XXI century is the need to reduce the exhaust emissions from piston combustion engines. Another, not at all less important problem is the depleting natural resources of crude oil. There are many concepts aiming at resolving of the said issues. One of them is the possibility of application of dimethyl ether (DME) in a classic engine. The paper characterizes this fuel, drawing attention to the aspects related to the adaptation of the engine to this type of fuel, presents the process of its atomization and relevant exhaust emissions.

Experimental Investigation on Combustion and Emission Characteristics of Modified Piston in an IDI Diesel Engine Fueled with Ethyl Alcohol

2014 ◽  
Vol 984-985 ◽  
pp. 873-877 ◽  
Author(s):  
M. Parthasarathy ◽  
J. Isaac Joshua Ramesh Lalvani ◽  
E. Prakash ◽  
S. Jayaraj ◽  
K. Annamalai
Keyword(s):  
Combustion Chamber ◽  
Ethyl Alcohol ◽  
Ignition Temperature ◽  
Flame Temperature ◽  
Emission Characteristics ◽  
Compression Ignition ◽  
Hot Surface Ignition ◽  
Compression Ignition Engines ◽  
Surface Ignition ◽  
Hot Surface

Compression ignition engines with ethyl alcohol as a fuel are associated with some problems. Because of ethyl alcohol has high self-ignition temperature. It can be used in compression engine by hot surface ignition method which is used to resolve the ignition of the fuel. The modification of the engine is carried out in such a way that a pre combustion chamber is designed in engine head with a provision for heat plug is made on the pre combustion chamber. A piston with squish plate is designed and thermally analyzed. The squish piston helps for attaining better homogeneous mixture than conventional piston. Thus the better combustion is obtained with the squish piston resulting with higher adiabatic flame temperature than the conventional piston. When air is inducted into the combustion chamber it is exposed to high temperature. Modifications for pure ethyl alcohol made significant improvement in thermal efficiency, torque and reduction in specific fuel consumption of an engine. The results exhibit a path toward ethyl alcohol has an effective alternative to conventional diesel engines.

Effects of dual biofuel approach for total elimination of diesel on injection system by reciprocatory friction monitor

2017 ◽  
Vol 232 (9) ◽  
pp. 1068-1076 ◽  
Author(s):  
Paramvir Singh ◽  
Varun Goel ◽  
SR Chauhan
Keyword(s):  
Diesel Engine ◽  
Fossil Fuels ◽  
Operating Conditions ◽  
Injection System ◽  
Effect Of Temperature ◽  
Compression Ignition ◽  
Oil Blends ◽  
Compression Ignition Engines ◽  
The Impact ◽  
Total Elimination

Biodiesel is a promising fuel which shows potential and gradually received attention as a best alternate feedstock for diesel engine. Previous investigations have shown that use of double biofuels in a diesel engine can be a promising aspect for complete elimination of diesel from compression ignition engines which will decrease our dependency on fossil fuels. The tribological performance of injection system is primarily based on the lubricity characteristics of the fuel. So, it is imperative to a more diversified research about the impact of using double biofuels in engine. In the present investigation, different biodiesel-oil blends were investigated using the ASTM D6079 by the reciprocatory friction monitor. The effect of temperature variation on lubricity characteristics was also studied. The biodiesel-oil blends shows improvement in results as compared to diesel. Biodiesel is prone to oxidation due to availability of unsaturation in their moieties. The effects of oxidation on lubricity characteristics were also studied. It was also found that the operating conditions collectively affected the lubricity characteristics of tested feedstocks.

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