COMPUTATION OF AIR CHEMICAL EQUILIBRIUM COMPOSITION UNTIL 30000K - PART I doi: 10.5028/jatm.2011.03021011
An algorithm was developed to obtain the air chemical equilibrium composition. The air was considered to be composed of 79% N2 and 21% O2, and the models are 5 chemical species, N2,O2, NO, N, O, NO+, e-, respectively. The air chemical equilibrium composition is obtained through the equilibrium const...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Instituto de Aeronáutica e Espaço (IAE)
2011-09-01
|
| Series: | Journal of Aerospace Technology and Management |
| Subjects: | |
| Online Access: | https://www.jatm.com.br/jatm/article/view/91 |
| _version_ | 1828359879010549760 |
|---|---|
| author | Carlos Alberto Rocha Pimentel Annibal Hetem Jr. |
| author_facet | Carlos Alberto Rocha Pimentel Annibal Hetem Jr. |
| author_sort | Carlos Alberto Rocha Pimentel |
| collection | DOAJ |
| description | An algorithm was developed to obtain the air chemical equilibrium composition. The air was considered to be composed of 79% N2 and 21% O2, and the models are 5 chemical species, N2,O2, NO, N, O, NO+, e-, respectively. The air chemical equilibrium composition is obtained through the equilibrium constants method and it was used the Absolute Newton method for convergence.
The algorithm can be coupled as a subroutine into a Computational Fluid Dynamics code, given the flow field over an atmosphere reentry vehicle where, due to high velocities, dissociative chemical reactions and air ionization can occur. This work presents results of air chemical equilibrium composition for pressures of 1, 5, 10, 50 and 100 atm in a temperature range from 300 to 30000K.
|
| first_indexed | 2024-04-14T03:47:47Z |
| format | Article |
| id | doaj.art-47e28e66599b41dd8bd75c89319a81fa |
| institution | Directory Open Access Journal |
| issn | 2175-9146 |
| language | English |
| last_indexed | 2024-04-14T03:47:47Z |
| publishDate | 2011-09-01 |
| publisher | Instituto de Aeronáutica e Espaço (IAE) |
| record_format | Article |
| series | Journal of Aerospace Technology and Management |
| spelling | doaj.art-47e28e66599b41dd8bd75c89319a81fa2022-12-22T02:14:10ZengInstituto de Aeronáutica e Espaço (IAE)Journal of Aerospace Technology and Management2175-91462011-09-0132COMPUTATION OF AIR CHEMICAL EQUILIBRIUM COMPOSITION UNTIL 30000K - PART I doi: 10.5028/jatm.2011.03021011Carlos Alberto Rocha Pimentel0Annibal Hetem Jr.1Federal University of ABC Santo André/SP – BrazilFederal University of ABC Santo André/SP – BrazilAn algorithm was developed to obtain the air chemical equilibrium composition. The air was considered to be composed of 79% N2 and 21% O2, and the models are 5 chemical species, N2,O2, NO, N, O, NO+, e-, respectively. The air chemical equilibrium composition is obtained through the equilibrium constants method and it was used the Absolute Newton method for convergence. The algorithm can be coupled as a subroutine into a Computational Fluid Dynamics code, given the flow field over an atmosphere reentry vehicle where, due to high velocities, dissociative chemical reactions and air ionization can occur. This work presents results of air chemical equilibrium composition for pressures of 1, 5, 10, 50 and 100 atm in a temperature range from 300 to 30000K. https://www.jatm.com.br/jatm/article/view/91Air compositionNitrogen chemistryHigh temperatureChemical equilibrium problemAbsolute Newton method. |
| spellingShingle | Carlos Alberto Rocha Pimentel Annibal Hetem Jr. COMPUTATION OF AIR CHEMICAL EQUILIBRIUM COMPOSITION UNTIL 30000K - PART I doi: 10.5028/jatm.2011.03021011 Journal of Aerospace Technology and Management Air composition Nitrogen chemistry High temperature Chemical equilibrium problem Absolute Newton method. |
| title | COMPUTATION OF AIR CHEMICAL EQUILIBRIUM COMPOSITION UNTIL 30000K - PART I doi: 10.5028/jatm.2011.03021011 |
| title_full | COMPUTATION OF AIR CHEMICAL EQUILIBRIUM COMPOSITION UNTIL 30000K - PART I doi: 10.5028/jatm.2011.03021011 |
| title_fullStr | COMPUTATION OF AIR CHEMICAL EQUILIBRIUM COMPOSITION UNTIL 30000K - PART I doi: 10.5028/jatm.2011.03021011 |
| title_full_unstemmed | COMPUTATION OF AIR CHEMICAL EQUILIBRIUM COMPOSITION UNTIL 30000K - PART I doi: 10.5028/jatm.2011.03021011 |
| title_short | COMPUTATION OF AIR CHEMICAL EQUILIBRIUM COMPOSITION UNTIL 30000K - PART I doi: 10.5028/jatm.2011.03021011 |
| title_sort | computation of air chemical equilibrium composition until 30000k part i doi 10 5028 jatm 2011 03021011 |
| topic | Air composition Nitrogen chemistry High temperature Chemical equilibrium problem Absolute Newton method. |
| url | https://www.jatm.com.br/jatm/article/view/91 |
| work_keys_str_mv | AT carlosalbertorochapimentel computationofairchemicalequilibriumcompositionuntil30000kpartidoi105028jatm201103021011 AT annibalhetemjr computationofairchemicalequilibriumcompositionuntil30000kpartidoi105028jatm201103021011 |