{"id":910,"date":"2023-11-13T09:38:49","date_gmt":"2023-11-13T14:38:49","guid":{"rendered":"https:\/\/aeroetslab.ca\/?p=910"},"modified":"2023-11-14T15:02:05","modified_gmt":"2023-11-14T20:02:05","slug":"effect-of-nozzle-chevron-technology-on-the-near-field-contrail-properties-behind-an-aircraft-engine-using-a-cfd-microphysics-coupling","status":"publish","type":"post","link":"https:\/\/aeroetslab.ca\/en\/2023\/11\/13\/effect-of-nozzle-chevron-technology-on-the-near-field-contrail-properties-behind-an-aircraft-engine-using-a-cfd-microphysics-coupling\/","title":{"rendered":"(2022) Effect of nozzle chevron technology on the near-field contrail properties behind an aircraft engine using a CFD-microphysics coupling"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Date de pr\u00e9sentation: Septembre 2022<\/p>\n\n\n\n<p class=\"has-text-align-left wp-block-paragraph\">Auteur(s): S\u00e9bastien Cantin, Adrien Misandeau, Mohamed Chouak, Fran\u00e7ois Garnier<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Conf\u00e9rence: ISABE 2022, Ottawa, ON, Canada<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.researchgate.net\/publication\/364669987_Effect_of_nozzle_chevron_technology_on_the_near-field_contrail_properties_behind_an_aircraft_engine_using_a_CFD-microphysics_coupling\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.researchgate.net\/publication\/364669987_Effect_of_nozzle_chevron_technology_on_the_near-field_contrail_properties_behind_an_aircraft_engine_using_a_CFD-microphysics_coupling<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center\">Abstract<\/h2>\n\n\n\n<p class=\"has-text-align-justify wp-block-paragraph\">The formation of ice-particles in near-field aircraft plumes at cruise altitudes generates contrails. The latter trigger the formation of large cirrus clouds, called aircraft-induced clouds (AICs). These artificial clouds result in a net positive radiative forcing (warming) effect. Furthermore, the use of chevrons in modern jet engines helped to reduce jet noise of \u2018separate-flow\u2019 nozzles; however, the impact of this technology on near-field contrail properties has not been investigated. In this context, this paper presents a CFD-microphysics coupling strategy to model the 3-D dynamics and microphysical transformations in the near-field plume of an aircraft engine. The study investigates the effect of implementing the chevron technology in both fan and core nozzles on plume and ice-particle properties. For this purpose, 3-D unsteady Reynolds-Averaged Navier-Stokes simulations were carried out behind a realistic LEAP-1A engine geometry (high bypass-ratio 10.5:1) at cruise conditions. The microphysical modeling accounts for the main process of water-vapor condensation on pre-activated soot particles known as heterogeneous condensation. The plume dilution and ice crystals formation in the engine near-field jet were validated using available numerical and in-flight data to demonstrate the predictive capabilities of the proposed modeling strategy. Different geometrical parameters of fan- and core-nozzles were investigated by varying the number and the penetration angle of chevrons. The comprehensive analysis showed that core-chevron nozzles lead to higher kinetic turbulent energy, higher liquid saturation ratio, larger ice particles and thicker contrails than chevron fan-nozzles and the baseline nozzle without chevrons. The proposed model can be hence used in future studies to characterize the impact of tabs or lobed nozzle-exit parameters on the optical and microphysical properties of near-field contrails.<br><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cantin, S., Misandeau, A., Chouak, M., Garnier, F. (2022). Effect of nozzle chevron technology on the near-field contrail properties behind an aircraft engine using a CFD-microphysics coupling. ISABE 2022. Ottawa, ON, Canada.<\/p>","protected":false},"excerpt":{"rendered":"<p>Date de pr\u00e9sentation: Septembre 2022 Auteur(s): S\u00e9bastien Cantin, Adrien Misandeau, Mohamed Chouak, Fran\u00e7ois Garnier Conf\u00e9rence: ISABE 2022, Ottawa, ON, Canada <a href=\"https:\/\/www.researchgate.net\/publication\/364669987_Effect_of_nozzle_chevron_technology_on_the_near-field_contrail_properties_behind_an_aircraft_engine_using_a_CFD-microphysics_coupling\" rel=\"nofollow\">https:\/\/www.researchgate.net\/publication\/364669987_Effect_of_nozzle_chevron_technology_on_the_near-field_contrail_properties_behind_an_aircraft_engine_using_a_CFD-microphysics_coupling<\/a> Abstract The formation of ice-particles in near-field aircraft plumes at cruise altitudes generates contrails. The latter trigger the formation of large cirrus clouds, called aircraft-induced clouds (AICs). These artificial clouds result in a net [&hellip;]<\/p>\n","protected":false},"author":238496019,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"_crdt_document":"","jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"_wpas_customize_per_network":false},"categories":[6358],"tags":[],"class_list":["post-910","post","type-post","status-publish","format-standard","hentry","category-publications-scientifiques"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - 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