Effet des carburants aéronautiques durables sur la formation de traînées de condensation à travers les routes de vol: une analyse thermodynamique

Auteurs-es

  • Zoya Sharma Liberal Arts and Science Academy, Austin, TX, United States of America

DOI :

https://doi.org/10.18192/osurj.v5i1.8091

Résumé

Le cirrus de traînée induit par l’aviation est reconnu pour être responsable d’un impact climatique important, pourtant les stratégies d’atténuation basées sur le carburant et le moteur reçoivent moins d’attention que la recherche sur l’optimisation de la trajectoire de vol et de l’altitude. Les études d’optimisation de trajectoire de vol nécessitent une énorme coordination multipartite, une collecte de données en temps réel et des partenaires de recherche riches en ressources. Cette étude évalue l’impact des carburants aéronautiques durables (SAF) sur la formation de traînées de condensation, qui constitue une voie de recherche plus propice à la modélisation. L’utilisation de trois types de SAF, esters hydrotraités et acides gras (kérosène paraffinique synthétique HEFA-SPK), kérosène paraffinique synthétique Fischer-Tropsch (FT-SPK) et kérosène paraffinique synthétique alcool-à-jet (ATJ-SPK), a été modélisée sur quatre routes de vol représentatives. Un cadre mathématique basé sur le critère de Schmidt-Appleman (SAC) a été développé. Ce cadre a été appliqué aux données atmosphériques à chaque point de passage le long des routes du grand cercle pour les quatre trajectoires de vol, permettant d’évaluer spatialement les probabilités de formation de traînées de condensation pour chaque type de carburant. Les trois SAF ont produit une augmentation marginale de la probabilité moyenne de formation de traînées par rapport au kérosène de base sur toutes les voies. Ce résultat est attribué aux indices d’émission de vapeur d’eau plus élevés et à la chaleur de combustion spécifique des SAF, qui augmentent le paramètre de pente G et déplacent les températures seuils vers des valeurs plus chaudes. Cependant, cet effet thermodynamique fonctionne indépendamment du principal mécanisme d’atténuation des SAF : la réduction des émissions de particules non volatiles (nvPM). Les émissions réduites de nvPM suppriment la nucléation des cristaux de glace par une voie physique distincte non capturée dans le cadre thermodynamique. Les résultats représentent donc une estimation dans le pire des cas de la probabilité de formation de traînées de condensation, et on s’attend à ce que le bénéfice climatique complet du déploiement du SAF soit réalisé lorsque les effets nvPM sont intégrés à l’évaluation thermodynamique présentée ici.

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Publié-e

2026-06-17

Numéro

Vol. 5 No. 1 (2026)

Rubrique

Recherche originale

Licence

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