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Research Papers: Internal Combustion Engines

Effect of Swirl and Injection Pressure on Performance and Emissions of JP-8 Fueled High Speed Single Cylinder Diesel Engine

[+] Author and Article Information
Chandrasekharan Jayakumar1

Jagdish Nargunde, Anubhav Sinha, Naeim A. Henein, Walter Bryzik

 Mechanical Engineering, Wayne State University, Detroit, MI 48202

Eric Sattler

US Army TARDEC, 6501 E 11 Mile Road,Warren, MI 48397

1

Corresponding author.

J. Eng. Gas Turbines Power 134(2), 022802 (Dec 14, 2011) (9 pages) doi:10.1115/1.4003973 History: Received December 10, 2010; Revised December 20, 2010; Published December 14, 2011; Online December 14, 2011

JP-8 is being closely watched as a suitable fuel for the “One fuel policy” by US Army. Some of the main targets of Army in the battle are the fuel economy and smoke/soot emissions. Soot emissions can be reduced in two ways, by increasing the injection pressure or by increasing swirl. An investigation was conducted to find out the more effective way to reduce soot emissions and to evaluate the influence of the swirl motion on JP-8 fuel combustion, performance and emissions in a single cylinder diesel engine. Increasing swirl increased heat losses and produced lower temperatures during injection process. Increasing swirl improved the premixed combustion fraction and produced higher peak temperatures and in turn increased NOx emissions. Increasing swirl also increased the nano-particle emissions.

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Copyright © 2012 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

(a) Injection timing and (b) injection duration used for JP-8 at different swirls

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Figure 2

Apparent rate of heat release (ARHR) curve

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Figure 3

Effect of swirl ratio on early evaporation stage of JP-8 fuel at different injection pressures

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Figure 4

Normalized cumulative heat release (mass fraction of fuel burned)

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Figure 5

Effect of swirl ratio on ignition delay at different injection pressures

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Figure 6

(a) Actual cylinder pressure curves and (b) peak cylinder pressures at different inj. pressures for different swirls

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Figure 7

Mean cylinder temperature during ignition delay and peak mass average cylinder temperature

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Figure 8

Exhaust temperature trend comparison

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Figure 9

NOx emissions at different swirls

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Figure 10

(a) HC and (b) CO emissions at different swirls

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Figure 11

Effect of swirl ratio on and injection pressure on average particle size distribution of JP-8

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Figure 12

Effect of swirl ratio and injection pressure on (a) mode of number size distribution (b) particulate number concentration

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Figure 13

Effect of swirl and injection pressure on nucleation mode particle size distribution of JP-8

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Figure 14

Effect of swirl and injection pressure on particulate mass distribution

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