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백민수(Min Su Paek),최석호(Suk Ho Choi),이경우(Kyeong Woo Lee),천무환(Mu Hwan Chon) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
As a vacuum or low pressure pumping system, vacuum ejector system has been widely used because of its convenient operation and high pumping efficiency. Ejectors are the main part of vacuum system, of which designs determine the efficiency of vacuum system. Through 2-stage steam ejectors, the vacuum system operating characteristics were experimentally analyzed. The results shows that as the motive steam pressure is higher, the suction pressure is lower inversely. But, as the suction flow rate glows higher, the suction pressure becomes higher, too. In 2-stage vacuum system, the ejector pressure was so correlated that affected each other. Also, the condenser conditions largely affected the ejector operations, too.
박부민(Poo Min Park),김형모(Hyung Mo Kim),최영호(Young Ho Choi),양수석(Soo Seok Yang),천무환(Mu Hwan Chon) 한국연소학회 2008 한국연소학회지 Vol.13 No.4
Performance test of 5MW class gasturbine combustor was carried out at combustor test facility of KARI(Korea Aerospace Research Institute). The combustor is dry low NOx type premixed combustor and fuel is natural gas. The characteristics of combustor were measured including emission, pressure pulsation and exit temperature distribution. Optimum operation point of combustor was found by changing parameters like fuel ratio between pilot and main burner. The test result showed that the combustor performance is sufficient to satisfy the gasturbinc system requirement.