Numerical modeling of plasma assisted pyrolysis and combustion of ammonia

Taaresh Sanjeev Taneja, Suo Yang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This work aims at studying the combustion and pyrolysis characteristics of ammonia (NH3 ) using non-equilibrium plasma. The well known challenges of ammonia combustion and the advantages of using non-equilibrium plasma are discussed using results of zero-dimensional and one-dimensional coupled simulations. Periodic nanosecond pulsed discharges of plasma are interspersed with microsecond gaps of combustion to assess the assistance provided by plasma on overall combustion characteristics of ammonia fuel, such as ignition delay and flammability limit. Due to the lack of a reliable plasma mechanism for ammonia, a validated plasma kinetic mechanism of methane and oxygen is transformed to that of ammonia and oxygen, and is coupled with an experimentally validated ammonia combustion mechanism in this work. Another NH3 / O2 / He plasma mechanism that was recently assembled and published is also used to study the discharge and inter-pulse kinetics. A 0D model is developed to compute the rates of the electron impact reactions during the discharge, and ion-electron recombination reactions and quenching reactions along with the combustion reactions during the gap. Finally, the species concentrations and temperatures from this model are compared with those obtained using a detailed 1D model which solves for the transient electric field in addition to the species concentrations and temperature.

Original languageEnglish (US)
Title of host publicationAIAA Scitech 2021 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Pages1-9
Number of pages9
ISBN (Print)9781624106095
StatePublished - 2021
EventAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021 - Virtual, Online
Duration: Jan 11 2021Jan 15 2021

Publication series

NameAIAA Scitech 2021 Forum

Conference

ConferenceAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021
CityVirtual, Online
Period1/11/211/15/21

Bibliographical note

Funding Information:
S. Yang gratefully acknowledges the faculty start-up funding from the University of Minnesota. T. Taneja acknowledges the fruitful discussions with Dr. Xingqian Mao, Dr. Yuan Wang, Mr. Timothy Chen and Ms. Galia Faingold during the development of the 0D solver and for choosing the correct plasma mechanism for ammonia. Both authors gratefully acknowledge Prof. Graham V. Candler and the Minnesota Supercomputing Institute (MSI) for the computational resources.

Publisher Copyright:
© 2021, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

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