{"583117":{"#nid":"583117","#data":{"type":"event","title":"PhD Defense by Tan Zu","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Defense\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003Eby\u003C\/p\u003E\r\n\r\n\u003Cp\u003ETan, Zu Puayen\u003C\/p\u003E\r\n\r\n\u003Cp\u003E(Advisor: Prof. Ben T. Zinn)\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EE\u003C\/strong\u003E\u003Cstrong\u003EXPERIMENTAL \u003C\/strong\u003E\u003Cstrong\u003ES\u003C\/strong\u003E\u003Cstrong\u003ETUDY OF \u003C\/strong\u003E\u003Cstrong\u003ES\u003C\/strong\u003E\u003Cstrong\u003EPRAY-\u003C\/strong\u003E\u003Cstrong\u003EF\u003C\/strong\u003E\u003Cstrong\u003EORMATION \u003C\/strong\u003E\u003Cstrong\u003EP\u003C\/strong\u003E\u003Cstrong\u003EROCESSES IN\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ET\u003C\/strong\u003E\u003Cstrong\u003EWIN-\u003C\/strong\u003E\u003Cstrong\u003EF\u003C\/strong\u003E\u003Cstrong\u003ELUID \u003C\/strong\u003E\u003Cstrong\u003EJ\u003C\/strong\u003E\u003Cstrong\u003EET-IN-\u003C\/strong\u003E\u003Cstrong\u003EC\u003C\/strong\u003E\u003Cstrong\u003EROSSFLOW\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAT \u003C\/strong\u003E\u003Cstrong\u003EJ\u003C\/strong\u003E\u003Cstrong\u003EET-\u003C\/strong\u003E\u003Cstrong\u003EE\u003C\/strong\u003E\u003Cstrong\u003ENGINE \u003C\/strong\u003E\u003Cstrong\u003EO\u003C\/strong\u003E\u003Cstrong\u003EPERATING \u003C\/strong\u003E\u003Cstrong\u003EC\u003C\/strong\u003E\u003Cstrong\u003EONDITIONS\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E2:00 PM, Wednesday, November 9, 2016\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003EMontgomery Knight Building\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003ERoom 317\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EABSTRACT:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Jet-in-crossflow (JICF) fuel-injection is widely applied in modern jet-engines to provide rapid fuel-atomization and mixing. However, \u0026ldquo;classical\u0026rdquo; JICF places large amounts of fuel into the low-velocity region near the injector wall, which can cause flashback and fuel-coking on the wall. A nascent fuel-injection technique called Twin-Fluid (TF) JICF is being considered as a way to mitigate Classical-JICF\u0026rsquo;s shortcomings. In TF-JICF, air is co-injected around the fuel jet to modify its atomization and penetration characteristics. Designers expect TF-JICF to enhance the fuel\u0026rsquo;s penetration away from the wall (i.e., reduce near-wall fuel concentrations). However, the performance of TF-JICF is currently not well understood, especially at the high pressures found in jet-engines. This dissertation work addresses the knowledge gap by experimentally investigating a TF-JICF where liquid Jet-A fuel was co-injected with pressurized nitrogen into a crossflow of air. The crossflow and injection conditions were varied over wide ranges that cover those conditions reported in the available TF-JICF literature, as well as those expected for jet-engines. The resulting TF-JICF fuel sprays were imaged by shadowgraphy, and their penetrations, dispersions and atomization processes were analyzed.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; For a fixed fuel flow-rate, different levels of air-injection velocities were found to cause different spray characteristics (see figure below). A mild injection of air inhibited the atomization of the initial fuel jet, thus reducing the near-wall fuel concentration and flashback\/wall-coking risks. A very strong injection of air \u0026ldquo;propelled\u0026rdquo; the fuel very far away from the wall while also enhancing atomization. On the other hand, medium levels of air-injection were generally non-beneficial towards fuel-injector design. Four TF-JICF regimes were identified (i.e., Classical-JICF, Air-Assist JICF, Airblast JICF and Airblast Spray-in-Crossflow) based on these characteristics and their formation mechanisms.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EThe reading committee will include:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EProf. Ben T Zinn (AE)\u003C\/p\u003E\r\n\r\n\u003Cp\u003EProf. Jerry Seitzman (AE)\u003C\/p\u003E\r\n\r\n\u003Cp\u003EProf. Jeff Jagoda (AE)\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Eugene Lubarsky (AE)\u003C\/p\u003E\r\n\r\n\u003Cp\u003EProf. Caroline Genzale (ME)\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":"EXPERIMENTAL STUDY OF SPRAY-FORMATION PROCESSES IN TWIN-FLUID JET-IN-CROSSFLOW  AT JET-ENGINE OPERATING CONDITIONS"}],"uid":"27707","created_gmt":"2016-10-25 19:26:27","changed_gmt":"2016-10-25 19:26:27","author":"Tatianna Richardson","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-11-09T14:00:00-05:00","event_time_end":"2016-11-09T16:00:00-05:00","event_time_end_last":"2016-11-09T16:00:00-05:00","gmt_time_start":"2016-11-09 19:00:00","gmt_time_end":"2016-11-09 21:00:00","gmt_time_end_last":"2016-11-09 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":"78771","name":"Public"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}