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RESEARCH PAPERS

# Combustion Characteristics of Compression Engine Driven by Emulsified Fuel Under Various Fuel Injection Angles

[+] Author and Article Information
M. P. Ashok, C. G. Saravanan

Department of Mechanical Engineering, Faculty of Engineering and Technology,  Annamalai University, Tamil Nadu 608 002, Indiampab97@yahoo.com

J. Energy Resour. Technol 129(4), 325-331 (Apr 30, 2007) (7 pages) doi:10.1115/1.2790994 History: Received May 27, 2006; Revised April 30, 2007

## Abstract

In this present work, the various emulsified fuel ratios of 50D:50E (50% Diesel No. 2: 50% ethanol 100% proof), 60D:40E, and 70D:30E have been prepared. Performance and emission tests are carried out for the emulsified fuel ratios and they have been compared with diesel fuel. The test results show that 50D:50E has given the best result based on the performance and less emission than the other fuel ratios. By keeping the selected fuel 50D:50E, the same performance and emission tests are conducted by varying their injection angles at $18deg$, $20deg$, $23deg$, and $24deg$. The outcome shows better performance and less emission by the fuel 50D:50E at $24deg$ injection angle (IA). Further, ignition delay, maximum heat release, and peak combustion pressure tests have been conducted. These results show that increase in IA decreases the delay period, thus increasing the pressure obtained at the maximum output. Also, $P‐θ$ diagram is drawn between crank angle and cylinder pressure. The maximum value is attained by the fuel 50D:50E at $24deg$ IA. All the tests have been conducted by maintaining the engine speed at $1500rpm$. The result shows that 50D:50E ratio fuel has been identified as a good emulsified fuel and its better operation is obtained at $24deg$ IA based on its best performance and less emissions.

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## Figures

Figure 1

Experimental setup

Figure 2

Comparison of brake thermal efficiency

Figure 3

Comparison of specific fuel consumption

Figure 4

Comparison of smoke density

Figure 5

Comparison of PM

Figure 6

Comparison of oxides of nitrogen

Figure 7

Comparison of the effect of IAs on brake thermal efficiency

Figure 8

Comparison of the effect of IAs on specific fuel consumption

Figure 15

Comparison of the effect of IAs at cylinder pressure

Figure 14

Comparison of the effect of IAs at peak combustion pressure

Figure 13

Comparison of the effect of IAs at maximum heat release

Figure 12

Comparison of the effect of IAs on ignition delay

Figure 11

Comparison of the effect of IAs on oxides of nitrogen

Figure 10

Comparison of the effect of IAs on particulate matter

Figure 9

Comparison of the effect of IAs on smoke density

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