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Analysis of Multimode Burning Characteristics of Isolated Droplets of Biodiesel–Diesel Blends

[+] Author and Article Information
Pratheesh Prakash

Research Scholar

Vasudevan Raghavan

Associate Professor
e-mail: raghavan@iitm.ac.in

Pramod S. Mehta

Professor
Indian Institute of Technology Madras,
Chennai 600036, India

1Corresponding author.

Contributed by the Internal Combustion Engine Division of ASME for publication in the JOURNAL OF Energy Resources Technology. Manuscript received August 31, 2012; final manuscript received November 9, 2012; published online February 12, 2013. Assoc. Editor: Kevin M. Lyons.

J. Energy Resour. Technol 135(2), 024501 (Feb 12, 2013) (6 pages) Paper No: JERT-12-1198; doi: 10.1115/1.4023174 History: Received August 31, 2012; Revised November 09, 2012

Blended fuels such as biodiesel–diesel blends are being extensively used in practical devises such as engines. The burning characteristics of blended fuels are quite different than that of the individual fuels and need to be understood. In this study, a semiempirical analysis concerning the mass burning rate characteristics of biodiesel–diesel blends is presented based on the data measured using porous sphere experiments. Finally, a correlation for evaluating instantaneous burning rate of biodiesel–diesel blended fuels has been proposed for practical applications. Further, using this correlation, transient burning characteristics of blended biodiesel–diesel droplet in suspended mode have been studied for different blend compositions. Multiple modes of burning regimes are identified for the blended fuels.

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Figures

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Fig. 1

Schematic of experimental setup

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Fig. 2

Comparison of theoretical mass burning rate predictions against experimental results

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Fig. 3

Nondimensional surface regression of (a) JME blends and (b) KME blends

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Fig. 4

Temporal variation of burning rates for (a) JME blends and (b) KME blends

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Fig. 5

Variation of mass burning rate with time for (a) J20D80 and (b) K20D80

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Fig. 6

Duration of different combustion modes

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