{"657071":{"#nid":"657071","#data":{"type":"event","title":"PhD Defense by Amanda Grubb","body":[{"value":"\u003Cp\u003EAmanda Grubb\u003Cbr \/\u003E\r\n(Advisor: Marilyn Smith)\u003Cbr \/\u003E\r\nwill defend a doctoral thesis entitled,\u003Cbr \/\u003E\r\nComputational Investigation of Separated Flow and Stall Events on Rotating\u003Cbr \/\u003E\r\nSystems\u003Cbr \/\u003E\r\nOn\u003Cbr \/\u003E\r\nWednesday, April 13 at 10:00 a.m.\u003Cbr \/\u003E\r\nWeber 200\u003Cbr \/\u003E\r\nAbstract\u003Cbr \/\u003E\r\nHelicopters have traditionally been largely associated with military use. Over the past decade,\u003Cbr \/\u003E\r\nnew and diverse commercial applications have been discovered for vehicles that can\u003Cbr \/\u003E\r\ntakeoff\/land vertically and achieve mid-flight hover. The need for a new military rotorcraft\u003Cbr \/\u003E\r\nfleet, coupled with the explosion of potential commercial applications, has created a sense of\u003Cbr \/\u003E\r\nurgency in developing next generation rotorcraft with improved speed, range, and agility.\u003Cbr \/\u003E\r\nRotorcraft are highly complex, dynamic vehicles with aeromechanics that are conducive to\u003Cbr \/\u003E\r\nchallenging problems. Many problems encountered by rotorcraft are a result of flow\u003Cbr \/\u003E\r\nseparation on the rotor. Increased speed, range, and agility requirements will only exacerbate\u003Cbr \/\u003E\r\nthese effects. Understanding flow separation on the rotor plane and the effects it has on the\u003Cbr \/\u003E\r\nvehicle is fundamental to solving problems facing the next generation of rotorcraft\u003Cbr \/\u003E\r\ndevelopment. The best approach to fully understand flow separation on the rotor plane is\u003Cbr \/\u003E\r\nthrough a combination of experimentation and computational fluid dynamics.\u003Cbr \/\u003E\r\nThis dissertation couples high fidelity CFD with trusted experimental data sets to create a\u003Cbr \/\u003E\r\ncomplete picture of rotorcraft flowfields for study. State-of-the-art CFD modeling techniques,\u003Cbr \/\u003E\r\nmany of which have not been addressed recently, are evaluated to identify and quantify their\u003Cbr \/\u003E\r\ncapabilities and limitations. This includes grid refinement approach, numerical approach,\u003Cbr \/\u003E\r\nturbulence model effectiveness, and aeroelastic coupling bias. Rich flowfield data from CFD,\u003Cbr \/\u003E\r\ncoupled with experimental data, are explored to further understand separated flow on the\u003Cbr \/\u003E\r\nrotor and its effects on rotorcraft performance. Separated flow is classified by separation\u003Cbr \/\u003E\r\nmechanism via isolation of blade motion from shed tip vortices. Dominant flowfield vortices\u003Cbr \/\u003E\r\nare studied to understand their impact on rotor performance using the Biot-Savart Law.\u003Cbr \/\u003E\r\nCommittee\u003Cbr \/\u003E\r\n\u0026bull; Mr. Rohit Jain\u003Cbr \/\u003E\r\n\u0026bull; Dr. Juergen Rauleder\u003Cbr \/\u003E\r\n\u0026bull; Dr. Christina Riso\u003Cbr \/\u003E\r\n\u0026bull; Dr. Daniel Schrage\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Computational Investigation of Separated Flow and Stall Events on Rotating Systems"}],"uid":"27707","created_gmt":"2022-04-07 17:10:11","changed_gmt":"2022-04-07 17:10:11","author":"Tatianna Richardson","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2022-04-13T11:00:00-04:00","event_time_end":"2022-04-13T13:00:00-04:00","event_time_end_last":"2022-04-13T13:00:00-04:00","gmt_time_start":"2022-04-13 15:00:00","gmt_time_end":"2022-04-13 17:00:00","gmt_time_end_last":"2022-04-13 17:00:00","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":""}}}