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On nanosecond plasma-assisted ammonia combustion: Effects of pulse and mixture properties by Mohammad Shahsavari; Alexander A. Konnov; Agustin Valera-Medina; Mehdi Jangi is a Engineering article available to read on EtoBox.

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In this study, the effects of nanosecond plasma discharges on the combustion characteristics of ammonia are investigated over a wide range of mixture properties and plasma settings. The results reveal that the impacts of the plasma on ammonia combustion change non-monotonically by altering the reduced electric field value. Within the studied range of the reduced electric field, i.e., 100–700 Td, it is shown that plasma is most effective in the medium range, e.g., 250–400 Td. At lower values, the main fraction of the plasma energy is consumed to excite the diluent to higher vibrational levels. At very high reduced electric field values, a substantial portion of the plasma energy is transferred into the ionization reactions of the diluent, which compromises the effective excitations of fuel and oxidizer species. In terms of the pulse energy density, results indicate that an increase in the range of 0–20 mJ/cm3, at a given reduced electric field, decreases the ignition delay time by five orders of magnitude, and increases the laminar flame speed up to an order of magnitude, depending on the mixture composition. The results show that the plasma discharge produces more radicals, electro

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Author

Mohammad Shahsavari; Alexander A. Konnov; Agustin Valera-Medina; Mehdi Jangi

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Engineering (Physical Sciences)