Charged Species Concentration in Combusting Mixtures Using Equilibrium Chemistry
Ionization in flames is of interest in the design and development of modern combustion devices. The identity and concentration of various charged species in reacting mixtures can play an important role in the diagnostics and control of such devices. Simplified chemistry computations that provide goo...
Saved in:
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2018-01-01
|
| Series: | Journal of Combustion |
| Online Access: | http://dx.doi.org/10.1155/2018/9047698 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850230466152497152 |
|---|---|
| author | S. M. Aithal |
| author_facet | S. M. Aithal |
| author_sort | S. M. Aithal |
| collection | DOAJ |
| description | Ionization in flames is of interest in the design and development of modern combustion devices. The identity and concentration of various charged species in reacting mixtures can play an important role in the diagnostics and control of such devices. Simplified chemistry computations that provide good estimates of ionic species in complex flow-fields can be used to model turbulent reacting flows in various combustion devices, greatly reducing the required computational resources for design and development studies. A critical assessment of the use of the equilibrium chemistry method to compute charged species concentration in combusting mixtures under various temperatures, pressures, and thermal disequilibrium conditions is presented. The use of equilibrium chemistry to compute charged species concentrations in propane-air mixtures performed by Calcote and King has been extended. A more accurate computational methodology that includes the effect of negative ions, chemi-ions (H3O+ and CHO+), and thermal nonequilibrium was investigated to evaluate the suitability of equilibrium computations for estimating charged species concentrations in reacting mixtures. The results show that equilibrium computations which include the effects of H3O+ and elevated electron temperatures can indeed explain the levels of ion concentrations observed in laboratory flame experiments under lean and near-stoichiometric conditions. Furthermore, under engine-like conditions at higher temperatures and pressures, equilibrium computations can be used to obtain useful estimates of charged species concentrations in modern combustion devices. |
| format | Article |
| id | doaj-art-28e157b9b4f84bb0868752dfbf3d427d |
| institution | OA Journals |
| issn | 2090-1968 2090-1976 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Combustion |
| spelling | doaj-art-28e157b9b4f84bb0868752dfbf3d427d2025-08-20T02:03:52ZengWileyJournal of Combustion2090-19682090-19762018-01-01201810.1155/2018/90476989047698Charged Species Concentration in Combusting Mixtures Using Equilibrium ChemistryS. M. Aithal0Argonne National Laboratory, 9700 S. Cass Ave., Lemont, IL 60439, USAIonization in flames is of interest in the design and development of modern combustion devices. The identity and concentration of various charged species in reacting mixtures can play an important role in the diagnostics and control of such devices. Simplified chemistry computations that provide good estimates of ionic species in complex flow-fields can be used to model turbulent reacting flows in various combustion devices, greatly reducing the required computational resources for design and development studies. A critical assessment of the use of the equilibrium chemistry method to compute charged species concentration in combusting mixtures under various temperatures, pressures, and thermal disequilibrium conditions is presented. The use of equilibrium chemistry to compute charged species concentrations in propane-air mixtures performed by Calcote and King has been extended. A more accurate computational methodology that includes the effect of negative ions, chemi-ions (H3O+ and CHO+), and thermal nonequilibrium was investigated to evaluate the suitability of equilibrium computations for estimating charged species concentrations in reacting mixtures. The results show that equilibrium computations which include the effects of H3O+ and elevated electron temperatures can indeed explain the levels of ion concentrations observed in laboratory flame experiments under lean and near-stoichiometric conditions. Furthermore, under engine-like conditions at higher temperatures and pressures, equilibrium computations can be used to obtain useful estimates of charged species concentrations in modern combustion devices.http://dx.doi.org/10.1155/2018/9047698 |
| spellingShingle | S. M. Aithal Charged Species Concentration in Combusting Mixtures Using Equilibrium Chemistry Journal of Combustion |
| title | Charged Species Concentration in Combusting Mixtures Using Equilibrium Chemistry |
| title_full | Charged Species Concentration in Combusting Mixtures Using Equilibrium Chemistry |
| title_fullStr | Charged Species Concentration in Combusting Mixtures Using Equilibrium Chemistry |
| title_full_unstemmed | Charged Species Concentration in Combusting Mixtures Using Equilibrium Chemistry |
| title_short | Charged Species Concentration in Combusting Mixtures Using Equilibrium Chemistry |
| title_sort | charged species concentration in combusting mixtures using equilibrium chemistry |
| url | http://dx.doi.org/10.1155/2018/9047698 |
| work_keys_str_mv | AT smaithal chargedspeciesconcentrationincombustingmixturesusingequilibriumchemistry |