{"656626":{"#nid":"656626","#data":{"type":"event","title":"PhD Defense by  Alex Michael Moushegian","body":[{"value":"\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDate: Tuesday, April 19\u003Csup\u003Eth\u003C\/sup\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003ETime: 1:00 PM to 4:00 PM\u003C\/p\u003E\r\n\r\n\u003Cp\u003ELocation: Montgomery Knight Room 317 and TEAMs (\u003Ca href=\u0022https:\/\/teams.microsoft.com\/l\/meetup-join\/19%3ameeting_MWI5NjQxYmEtY2U3NS00M2I1LWFkNGYtMTdmYmJhYTUzY2Ix%40thread.v2\/0?context=%7b%22Tid%22%3a%22482198bb-ae7b-4b25-8b7a-6d7f32faa083%22%2c%22Oid%22%3a%22f5f8364d-3599-4f46-b00a-9a0064279df4%22%7d\u0022 target=\u0022_blank\u0022\u003Ehttps:\/\/teams.microsoft.com\/l\/meetup-join\/19%3ameeting_MWI5NjQxYmEtY2U3NS00M2I1LWFkNGYtMTdmYmJhYTUzY2Ix%40thread.v2\/0?context=%7b%22Tid%22%3a%22482198bb-ae7b-4b25-8b7a-6d7f32faa083%22%2c%22Oid%22%3a%22f5f8364d-3599-4f46-b00a-9a0064279df4%22%7d\u003C\/a\u003E)\u003C\/p\u003E\r\n\r\n\u003Cp\u003ETitle: \u0026ldquo;Dual Solver Computational Modeling of Ship-Helicopter Dynamic Interface Aeromechanics\u0026rdquo;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAuthor: Alex Michael Moushegian\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAdvisor: Prof. Marilyn J. Smith\u003C\/p\u003E\r\n\r\n\u003Cp\u003ECommittee:\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Marilyn J. Smith \u0026ndash; School of Aerospace Engineering (Advisor)\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Glen R. Whitehouse \u0026ndash; Continuum Dynamics, Inc.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. J. V. R. Prasad \u0026ndash; School of Aerospace Engineering\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Juergen Rauleder \u0026ndash; School of Aerospace Engineering\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Susan A. Polsky \u0026ndash; NAVAIR, Patuxent River\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAbstract:\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EShipboard landings are a fundamental capability of naval aircraft operations and present a unique challenge to helicopter pilots due to the complex aerodynamic interactions between the ship airwake and the helicopter aerodynamics, known as the dynamic interface (DI).\u0026nbsp; As such, detailed analysis and testing must be done to establish the range of safe conditions at which these maneuvers can be performed, as well as to train pilots to perform them.\u0026nbsp; With the advancement of computational power in the last two to three decades, computational tools have been investigated as a way to supplement flight testing for characterization of the DI.\u0026nbsp; Hybrid CFD techniques have been developed in recent years with the intent of reducing the cost of rotorcraft computational fluid dynamics (CFD) simulations through coupling of an unsteady Reynolds-averaged Navier-Stokes (uRANS) solver with various lower-order computational aerodynamic solvers.\u0026nbsp; Particularly promising for DI applications is the hybrid uRANS\/free-vortex wake methodology, which uses uRANS to compute the rotor wake in the near-field and a potential flow model in the far-field.\u0026nbsp; This technique allows wake-body and wake-wake interactions in the DI to be modeled without the need for a highly resolved uRANS domain in the large region between the ship and the helicopter.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThis research describes the necessary improvements and extensions of a hybrid uRANS\/free-wake solver, OVERFLOW-CHARM, required to accurately characterize DI aerodynamics.\u0026nbsp; These improvements are demonstrated and validated on model problems which include fundamental physics of the DI. First, OVERFLOW-CHARM is applied to analysis of an integrated propulsion system where interactional aerodynamics influence the performance of both the propeller and the wing.\u0026nbsp; Second, OVERFLOW-CHARM is applied to rotors in ground effect, where its capabilities are quantified at a range of rotor scales.\u0026nbsp; This verifies that OVERFLOW-CHARM will be able to accurately capture the interaction of the rotor wake with the ship deck during shipboard landing simulations.\u0026nbsp; Finally, OVERFLOW-CHARM simulations replicating a flight test of the UH-60L helicopter operating within the influence of a model LPD-17 hangar face are performed to investigate OVERFLOW-CHARM\u0026#39;s capabilities at capturing low-speed object-induced recirculation (LOIDR) effects which impact helicopter performance in the DI.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Dual Solver Computational Modeling of Ship-Helicopter Dynamic Interface Aeromechanics"}],"uid":"27707","created_gmt":"2022-03-24 18:04:34","changed_gmt":"2022-03-24 18:04:34","author":"Tatianna Richardson","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2022-04-19T14:00:00-04:00","event_time_end":"2022-04-19T17:00:00-04:00","event_time_end_last":"2022-04-19T17:00:00-04:00","gmt_time_start":"2022-04-19 18:00:00","gmt_time_end":"2022-04-19 21:00:00","gmt_time_end_last":"2022-04-19 21:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"221981","name":"Graduate Studies"}],"categories":[],"keywords":[{"id":"100811","name":"Phd Defense"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}