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Kinetics of plasma-assisted combustion: effect of non-equilibrium excitation on the ignition and oxidation of combustible mixturesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 12 января 2022 г.
- Автор: Popov N.A.
- Журнал: Plasma Sources Science and Technology
- Том: 25
- Номер: 4
- Год издания: 2016
- Издательство: IOP Publishing
- Местоположение издательства: [Bristol, UK], England
- Первая страница: 043002
- Последняя страница: -
- DOI: 10.1088/0963-0252/25/4/043002
- Аннотация: A review of experimental and theoretical investigations of the effect of atomic particles, electronically and vibrationally excited molecules on the induction delay time and on the shift of the ignition temperature threshold of combustible mixtures is presented. The addition of oxygen and hydrogen atoms to combustible mixtures may cause significant reduction of the ignition delay time. However, at relatively low initial temperatures, the non-equilibrium effect on the addition of atomic particles in ground electronic states is not pronounced. At the same time, the effect of excited O(1D) atoms on the oxidation and reforming of combustible mixtures is quite significant due to the high rates of reactions of O(1D) atoms with hydrogen and hydrocarbon molecules. In fuel-air mixtures, collisions with O(1D) atoms determine, under certain conditions, dissociation of hydrocarbon molecules. The singlet oxygen molecules, O2(a1g), participate both in chain initiation and chain branching reactions, but the effect of O2(a1g) in the ignition processes is generally less important compared to the oxygen atoms. The reactions of vibrationally excited molecules and the processes of VT- relaxation in combustible mixtures have been discussed. The production of vibrationally excited N2(v) molecules in fuel-air mixtures at relatively low electric fields is very important. However, at the moment, the effect of the reactions of N2(v) molecules on the oxidation and ignition of combustible mixtures is not completely clear, and requires further investigation. Therefore, at this state of knowledge, to reduce the ignition delay time and decrease the temperature threshold of combustive mixtures, the use of gas discharge systems with relatively high E/N values is recommended. In this case the reactions of electronically excited N2(A3Sig, B3Пg, С3Пu, a'1Sig) molecules, and atomic particles in ground and electronically excited states are extremely important. The energy stored in electronically excited states of atoms and molecules is spent on the additional dissociation of oxygen and fuel molecules, on the fast gas heating, and finally to triggering of chain branching reactions.
- Добавил в систему: Попов Николай Александрович