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가스터빈 모사 연소기에서 선회 확산 화염의 연소특성 해석
정대로(Dae-Ro Joung),허강열(Kang-Yul Huh) 한국연소학회 2007 KOSCOSYMPOSIUM논문집 Vol.- No.-
The firtst-order conditional moment closure (CMC) model is applied to CH4/air swirl diffusion flame in a gas turbine model combustor. The flow and mixing fields are calculated by fast chemistry assumption with SLFM library and a beta function pdf for mixture fraction. RNG k-e model is used to consider the swirl flame in a confined wall. Reacting scalar fields are calculated by elliptic CMC formulation with chemical kinetic mechanism, GRI Mech 3.0. Validation is done against measurement data for mean flow and scalar fields in the model combustor [1]. Results show reasonable agreement with the mean mixture fraction and its variance, while temperature is overpredicted as the level of local extinction increases. The second-order CMC model is needed to consider local extinction with considerable conditional fluctuations near the nozzle.
캡 장착 내시경 점막절제술로 치료한 식도 위 접합부 조기 선암 1예
소예리,김대호,윤현아,석화영,홍성훈,정상완,차재명,이정일,주광로,신현필,박재준,전정원 이화여자대학교 의과학연구소 2012 EMJ (Ewha medical journal) Vol.35 No.2
Surgery is the primary treatment for adenocarcinoma originating from the esophagogastric junction. However, many physicians attempt various endoscopic treatments for the cases of early adenocarcinoma and high-grade dysplasia of esophagogastric junction in order to avoid the high risk of complications associated with surgical resection. Recently, there is an increasing tendency to use endoscopic mucosal resection for the management of early esophageal cancer due to low morbidity and mortality rates. We report here on a case of early adenocarcinoma at esophagogastric junction successfully treated with endoscopic mucosal resection.