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수직휜이 부착된 평행평판 채널내의 유동 및 열전달에 관한 수치해석
황기영,김홍제,모정하,Hwang, K.Y.,Kim, H.J.,Moh, J.H. 대한설비공학회 1995 설비공학 논문집 Vol.7 No.4
An analysis is made of the laminar fluid flow and heat transfer characteristics in a parallel-plate channel to whose walls are fitted with a series of equidistant staggered fins placed transversely to the flow direction. The governing equations are solved numerically by a finite-volume method for elliptic flows. Based on the obtained solutions of flow and temperature fields, the effects of Reynolds number and various geometric parameters on the heat transfer performance and pressure drop are evaluated. A comparson of the heat transfer characteristics between the channels with and without staggered fins is also made.
김홍제,황기영,Kim, H.J.,Hwang, K.Y. 대한설비공학회 1997 설비공학 논문집 Vol.9 No.4
The fluid flow and heat transfer characteristics of conjugate forced and natural convection in the triple-glazed airflow window, where the outer air passes through a space contrived between the interior and exterior window panes, were studied numerically by a finite volume method for the elliptic form of the Navier-Stokes equations. The investigation focused on the influence of window geometry, ventilastion rate and solar energy on the temperature, velocity distribution and thermal performance of the airflow window. The comparison between the triple-glazed airflow window and the enclosed triple-glazed window was also made to evaluate the effect of buoyancy upon which the thermal performance of the window depended.
연료의 미립화 및 증발 특성 데이터를 이용한 가스터빈 연소기 사이징 기법 고찰
김대식 ( D S Kim ),진유인 ( Y L Jin ),황기영 ( K Y Hwang ),민성기 ( S K Min ) 한국분무공학회 2014 한국액체미립화학회지 Vol.19 No.3
The current paper reviews the main characteristics and the operating principles of major fuel atomizers used for gas turbine combustors, including various empirical SMD equations for each atomizers. We have summarized various methodologies for evaluation of the combustion efficiency and for combustor sizing from the selected SMD data. It is found that the combustor sizing as well as the combustion efficiency are totally dependent upon the SMD calculation resutls, which means that special cares should be taken in choosing the SMD empirical equations.