Chemical kinetics at equilibrium of an ionized mixture
Identifieur interne : 002922 ( Main/Exploration ); précédent : 002921; suivant : 002923Chemical kinetics at equilibrium of an ionized mixture
Auteurs : G. Poissant [France] ; R. Prud'Homme [France]Source :
- Acta Astronautica [ 0094-5765 ] ; 1979.
English descriptors
- Teeft :
Abstract
Abstract: This paper describes a contribution to the investigation of changes in plasma ionization rates, caused by water injection. Concentrations were computed, assuming the existence of a state of chemical equilibrium in a mixture of perfect gases consisting of nitrogen and water, with 0.0001–1 mixture ratios. The most recent data on the 43 chemical species investigated were used. Temperatures ranged from 1500 to 6000°K, pressures from 10 to 104 Pa.Comparison with pure nitrogen plasma in identical temperature and pressure conditions revealed over- and de-ionization zones which are dependent on mixture ratio, among other factors.Computations required an adaptation of the Brinkley method, due to plasma neutrality and also to the selection of water injection, which involves a specific ratio of two chemical elements. These computations were used for predicting chemical changes induced by chemical kinetics in such plasmas. One result is the classification of chemical reactions in order of significance, leading to prediction of possible freezes, which is necessary to investigate actual cases of water injection.
Url:
DOI: 10.1016/0094-5765(79)90082-1
Affiliations:
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Poissant</name><affiliation wicri:level="4"><country xml:lang="fr">France</country><wicri:regionArea>Laboratoire d'Aérothermique, Université Pierre et Marie Curie, 92190 Meudon</wicri:regionArea><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Meudon</settlement></placeName><orgName type="university">Université Pierre-et-Marie-Curie</orgName></affiliation></author><author><name sortKey="Prud Homme, R" sort="Prud Homme, R" uniqKey="Prud Homme R" first="R." last="Prud'Homme">R. 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Concentrations were computed, assuming the existence of a state of chemical equilibrium in a mixture of perfect gases consisting of nitrogen and water, with 0.0001–1 mixture ratios. The most recent data on the 43 chemical species investigated were used. Temperatures ranged from 1500 to 6000°K, pressures from 10 to 104 Pa.Comparison with pure nitrogen plasma in identical temperature and pressure conditions revealed over- and de-ionization zones which are dependent on mixture ratio, among other factors.Computations required an adaptation of the Brinkley method, due to plasma neutrality and also to the selection of water injection, which involves a specific ratio of two chemical elements. These computations were used for predicting chemical changes induced by chemical kinetics in such plasmas. One result is the classification of chemical reactions in order of significance, leading to prediction of possible freezes, which is necessary to investigate actual cases of water injection.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Île-de-France</li></region><settlement><li>Meudon</li></settlement><orgName><li>Université Pierre-et-Marie-Curie</li></orgName></list><tree><country name="France"><region name="Île-de-France"><name sortKey="Poissant, G" sort="Poissant, G" uniqKey="Poissant G" first="G." last="Poissant">G. Poissant</name></region><name sortKey="Prud Homme, R" sort="Prud Homme, R" uniqKey="Prud Homme R" first="R." last="Prud'Homme">R. Prud'Homme</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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