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초음속 유동내 원형 2차분사 제트 주변에서의 표면 열전달 현상 연구
이종주(Jongju Yi),유만선(Mansun Yu),조형희(Hyunghee Cho) 한국추진공학회 2007 한국추진공학회지 Vol.11 No.2
Convective heat transfer coefficient was measured around a circular secondary jet ejected into the supersonic flow field. The wall temperature measurement around a injection nozzle was conducted using infra-red camera. The constant heat flux is applied to the wall around a secondary nozzle. According to jet to freestream momentum ratio, the injection flow penetrates into the supersonic flow field. The measured temperature is used to calculate the convective heat transfer coefficient.
연소가스 상태를 고려한 노내 보일러튜브의 최고온 산정 방법론
박명수(Park Myungsoo),송기욱(Song Geewook),박준수(Park Jun-Su),조형희(Cho Hyunghee) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
To prevent unscheduled trip of power plants by boiler tube damage, it is important to monitor boiler tube temperature during power plant operation. However, the direct measurement of tube temperature in the boiler is impossible by installing temperature probe during power plant operation because of harsh condition such as high temperature in the boiler heating zone. In this study, methodology to predict the tube temperature in the boiler heating zone is suggested using measured tube temperature in boiler none-heating zone. For precise local maximum tube temperature, the flue gas condition is considered.