An aerosol rapid compression machine for studying energetic-nanoparticle- enhanced combustion of liquid fuels

Casey Allen; Gaurav Mittal; Chih Jen Sung; Elisa Toulson; Tonghun Lee

doi:10.1016/j.proci.2010.06.007

An aerosol rapid compression machine for studying energetic-nanoparticle- enhanced combustion of liquid fuels

Casey Allen, Gaurav Mittal, Chih Jen Sung, Elisa Toulson, Tonghun Lee

Research output: Contribution to journal › Article › peer-review

Abstract

The use of energetic nanoparticles offers a promising means of adjusting the reactivity of liquid fuels for enhanced combustion stability in next generation propulsion systems. This work outlines the development of a novel aerosol rapid compression machine (RCM) for studying the impact of energetic nanoparticles on reducing the ignition delay of liquid fuels, and a proof-of-concept demonstration is presented using ethanol and JP-8. Fuel droplets are generated using an ultrasonic nozzle. The seeding of 50 nm aluminum nanoparticles in the liquid fuel is achieved by using a combination of chemical surfactants in addition to mixing in an ultrasonic bath. The autoignition delay is measured for neat and nanoparticle-enhanced mixtures at compressed conditions of 772-830 K and 12-28 bar in the RCM. The results show that significant changes in the ignition delay can be observed using a low concentration (2%-weight) of energetic nanoparticles. For ethanol and JP-8, ignition delays were reduced by 32% and 50%, respectively. Measurements to verify the uniformity of aerosol dispersion in the RCM, the reproducibility of the RCM data, and a method for approximating compressed temperature are also presented.

Original language	English (US)
Pages (from-to)	3367-3374
Number of pages	8
Journal	Proceedings of the Combustion Institute
Volume	33
Issue number	2
DOIs	https://doi.org/10.1016/j.proci.2010.06.007
State	Published - 2011
Externally published	Yes

Keywords

Autoignition
Energetically-enhanced combustion
Ethanol
JP-8
Nanoparticle

ASJC Scopus subject areas

General Chemical Engineering
Mechanical Engineering
Physical and Theoretical Chemistry

Online availability

10.1016/j.proci.2010.06.007

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@article{ab0d1e7888344c01a5d1a09f984b6a7f,

title = "An aerosol rapid compression machine for studying energetic-nanoparticle- enhanced combustion of liquid fuels",

abstract = "The use of energetic nanoparticles offers a promising means of adjusting the reactivity of liquid fuels for enhanced combustion stability in next generation propulsion systems. This work outlines the development of a novel aerosol rapid compression machine (RCM) for studying the impact of energetic nanoparticles on reducing the ignition delay of liquid fuels, and a proof-of-concept demonstration is presented using ethanol and JP-8. Fuel droplets are generated using an ultrasonic nozzle. The seeding of 50 nm aluminum nanoparticles in the liquid fuel is achieved by using a combination of chemical surfactants in addition to mixing in an ultrasonic bath. The autoignition delay is measured for neat and nanoparticle-enhanced mixtures at compressed conditions of 772-830 K and 12-28 bar in the RCM. The results show that significant changes in the ignition delay can be observed using a low concentration (2%-weight) of energetic nanoparticles. For ethanol and JP-8, ignition delays were reduced by 32% and 50%, respectively. Measurements to verify the uniformity of aerosol dispersion in the RCM, the reproducibility of the RCM data, and a method for approximating compressed temperature are also presented.",

keywords = "Autoignition, Energetically-enhanced combustion, Ethanol, JP-8, Nanoparticle",

author = "Casey Allen and Gaurav Mittal and Sung, {Chih Jen} and Elisa Toulson and Tonghun Lee",

note = "Funding Information: We express our gratitude to the Michigan State University Foundation and to the U.S. Department of Energy for funding the construction of the RCM (Award #: DE-FC26-07NT43278 ). G.M. acknowledges and thanks the College of Engineering at the University of Akron for support of his work. C.J.S. was supported as part of the Combustion Energy Frontier Research Center, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences (Award #: DE-SC0001198 ). ",

year = "2011",

doi = "10.1016/j.proci.2010.06.007",

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AU - Allen, Casey

AU - Mittal, Gaurav

AU - Sung, Chih Jen

AU - Toulson, Elisa

AU - Lee, Tonghun

N1 - Funding Information: We express our gratitude to the Michigan State University Foundation and to the U.S. Department of Energy for funding the construction of the RCM (Award #: DE-FC26-07NT43278 ). G.M. acknowledges and thanks the College of Engineering at the University of Akron for support of his work. C.J.S. was supported as part of the Combustion Energy Frontier Research Center, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences (Award #: DE-SC0001198 ).

PY - 2011

Y1 - 2011

N2 - The use of energetic nanoparticles offers a promising means of adjusting the reactivity of liquid fuels for enhanced combustion stability in next generation propulsion systems. This work outlines the development of a novel aerosol rapid compression machine (RCM) for studying the impact of energetic nanoparticles on reducing the ignition delay of liquid fuels, and a proof-of-concept demonstration is presented using ethanol and JP-8. Fuel droplets are generated using an ultrasonic nozzle. The seeding of 50 nm aluminum nanoparticles in the liquid fuel is achieved by using a combination of chemical surfactants in addition to mixing in an ultrasonic bath. The autoignition delay is measured for neat and nanoparticle-enhanced mixtures at compressed conditions of 772-830 K and 12-28 bar in the RCM. The results show that significant changes in the ignition delay can be observed using a low concentration (2%-weight) of energetic nanoparticles. For ethanol and JP-8, ignition delays were reduced by 32% and 50%, respectively. Measurements to verify the uniformity of aerosol dispersion in the RCM, the reproducibility of the RCM data, and a method for approximating compressed temperature are also presented.

AB - The use of energetic nanoparticles offers a promising means of adjusting the reactivity of liquid fuels for enhanced combustion stability in next generation propulsion systems. This work outlines the development of a novel aerosol rapid compression machine (RCM) for studying the impact of energetic nanoparticles on reducing the ignition delay of liquid fuels, and a proof-of-concept demonstration is presented using ethanol and JP-8. Fuel droplets are generated using an ultrasonic nozzle. The seeding of 50 nm aluminum nanoparticles in the liquid fuel is achieved by using a combination of chemical surfactants in addition to mixing in an ultrasonic bath. The autoignition delay is measured for neat and nanoparticle-enhanced mixtures at compressed conditions of 772-830 K and 12-28 bar in the RCM. The results show that significant changes in the ignition delay can be observed using a low concentration (2%-weight) of energetic nanoparticles. For ethanol and JP-8, ignition delays were reduced by 32% and 50%, respectively. Measurements to verify the uniformity of aerosol dispersion in the RCM, the reproducibility of the RCM data, and a method for approximating compressed temperature are also presented.

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KW - Ethanol

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An aerosol rapid compression machine for studying energetic-nanoparticle- enhanced combustion of liquid fuels

Abstract

Keywords

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