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배성훈(Seonghun Bae),김현묵(Hyunmuk Kim),홍준열(Joonyeol Hong),배대석(Daeseok Bae),김정수(Jeongsoo Kim) 한국추진공학회 2016 한국추진공학회 학술대회논문집 Vol.2016 No.5
본 연구는 이원추진제 추력기 설계/개발의 일환으로, 기체메탄/액체산소를 추진제로 사용하는 스월 동축형 인젝터의 리세스 길이 및 분사조건에 따른 거시적 분무특성을 분석하였다. 수류시험은 물(산화제)과 기체질소(연료)를 유사추진제로 사용하였다. 인젝터의 리세스 길이가 추진제 분무/혼합에 미치는 영향을 파악하기 위해 리세스 길이는 내부 인젝터 오리피스의 직경비로 증가하게 제작하였다. 기체-액체의 충돌위치에 따라 외부/내부혼합으로 구분하며, 리세스 길이의 증가에 따라 분무각은 외부혼합에서 증가하고, 내부혼합에서 감소하는 경향을 확인하였다. This research was carried out as part of the design/development for the bipropellant thruster. The objective is to investigate macroscopic spray characteristics with variation of recess length and operating conditions on the swirl-coaxia-injector using gaseous methane/liquid oxygen as propellant. In the cold-flow-test, water and gaseous nitrogen was used as propellant instead of oxygen and fuel. The recess length of the injector was increased according to the diameter ratio of the inner injector orifice in order to study spray characteristics depending on effects of recess length. Collision locations of propellant were distinguished between external mixing and internal mixing. When the injector sprays gas and liquid simultaneously, the spray angle in external mixing tends to increase with rise of the recess length, while in internal mixing, it is decreased.
배성훈(Seonghun Bae),정기철(Gichul Jung),김은희(EunHee Kim) (사)한국CDE학회 2015 한국CDE학회 논문집 Vol.20 No.1
The earthquake is a natural disaster causing loss of life or property damage and happens more often in Korea recently. Moreover, considering the increase of massive buildings, it is required to predict and visualize the information of the vibration in a building. In this paper, we developed a prototype framework to visualize the displacement information in the AR environments. In order to avoid the irregular halts of the scene and the unnatural distortion of the object, this framework uses the synchronization method at the scene update time and the interpolation of the sensor data for the displacement of vertices. In addition, we studied displacement estimation methods with the acceleration data to extend this framework to the system with accelerators.
ISO 15926 을 이용한 선박 기자재 검색 시스템 개발
배성훈(Seonghun Bae),안경익(Kyungik An),황진상(Jinsang Hwang) (사)한국CDE학회 2013 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2013 No.1
ISO 15926 is the international standard model for information integration in the field of process plant life cycle.This model to define a reference data library, but it is most of the information integration based. Part7 of ISO 15926 is about how to implement such regulations. Part7 by reference in the field of ship data to develop and expand the library, we can utilize to integrate information between two kinds of CAD systems in the field of ship. Ship equipments studies using the ISO 15926 classification system was established. And two kinds of CAD systems in independent neutral library for research was carried out. Neutral library can be stored on a server in the prototype implementation. In this study, based on standardized neutral library was built. Ship equipments between differenent CAD systems, including the next generation of CAD systems, in order to take advantage of a system that can perform a search of ontology was developed.