Optimum primary equivalence ratio for rich-lean two-stage combustion of non-premixed ammonia/methane/air and ammonia/hydrogen/air flames in a swirling flow
Rattachement africain : jp. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Rich-lean two-stage combustion concept was proposed for reducing emissions from ammonia-fueled gas turbine combustors. The primary combustion zone should be maintained at an optimum primary equivalence ratio for the simultaneous reduction of NO and unburned NH 3 ; however, the optimum primary equivalence ratio has been reported only for a limited number of fuel blends and ammonia mixing ratios. This study experimentally and numerically investigated the optimum primary equivalence ratio and studied its application in the rich-lean two-stage combustion of ammonia/methane/air and ammonia/hydrogen/air flames over a wide range of ammonia mixing ratios under atmospheric pressure. This study identifies factors determining the optimum primary equivalence ratio. The emissions were measured using a swirl combustor for single- and two-stage combustion. Unstretched freely propagating premixed flame simulations were performed using CHEMKIN-PRO for investigating the effects of chemical reactions on the optimum primary equivalence ratio. In both single- and two-stage combustion, the optimum primary equivalence ratios of non-premixed ammonia/methane/air and ammonia/hydrogen/air flames decreased linearly and exponentially with increasing ammonia mixing ratios, respectively. The rich-lean two-stage combustion eliminated unburned NH 3 and minimized NO over a wide range of ammonia mixing ratios for non-premixed ammonia/methane/air and ammonia/hydrogen/air flames. The numerical results confirm that OH radical plays an important role in determining the optimum primary equivalence ratio.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Optimum primary equivalence ratio for rich-lean two-stage combustion of non-premixed ammonia/methane/air and ammonia/hydrogen/air flames in a swirling flow
- Date Crossref
- 01/07/2024
- Éditeur
- Elsevier BV
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Tohoku University Department of Aerospace Engineering pays non établi dans la noticeUniversité ou école supérieure
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Kyushu University pays non établi dans la noticeUniversité ou école supérieure
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National Institute of Advanced Industrial Science and Technology pays non établi dans la noticeOrganisme public
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IHI Corporation (Japan) pays non établi dans la noticeEntreprise
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Faculty of Engineering Department of Mechanical Engineering pays non établi dans la noticeUniversité ou école supérieure
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Fukushima Renewable Energy Institute pays non établi dans la noticeStructure de recherche
Department of Aerospace Engineering — Tohoku University, Kyushu University et National Institute of Advanced Industrial Science and Technology, avec 3 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.