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A simulation for prediction of nitrogen oxide emissions in lean premixed combustor
이도용,박정규,Jaemin Jin,이민철 대한기계학회 2011 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.25 No.7
Chemical reactor networks (CRN) models were developed for lean premixed gas turbine combustor to predict the NOx emissions. In this study, CRN models are constructed based on the computational fluid dynamics (CFD) for both non-pilot and pilot flame cases. Predictions of NOx emissions in combustor with the developed models were made by using CHEMKIN code and full GRI 3.0 chemical kinetic mechanism in the CRN. The predicted results agree reasonably well with the experimental data obtained from a simplified test combustor for the GE7FA gas turbine. The effects of overall equivalence ratio, swirl angle and pilot fuel ratio on the NOx emissions were investigated.
이도용,도남용,박성용 대한이비인후과학회 2002 대한이비인후과학회지 두경부외과학 Vol.45 No.7
Basaloid squamous cell carcinoma (BSCC), an uncommon tumor with predilection for the upper aerodigestive tract, is a dis-tinct variant of squamous cell carcinoma, because of its unique histological features and ominous clinical behavior. Basaloid 1986 by Wain et al. have confirmed that the head and neck region is the most frequently involved region, with majority of the cases arising in the supraglottic larynx, hypopharynx, tonsil and base of tongue. Other head and neck sites include the pa-late, buccal cavity, flor of mouth, nasopharynx, trachea, and sinonasal tract. BSC is not limited to the head and neck region but has also been described in the esophagus, lung, thymus, anus and cervix among other sites. We experienced and treated a report here the rare case of BSCC invading the temporal bone with literature. (Korean J Otolaryngol 2002;45:719-21)