http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
풍력 발전 블레이드 Trailing Edge 부에서의 손상 감지 기법
이재현(J.H. Lee),허용학(Y.H. Huh),김동진(D.J. Kim),김종일(J.I. Kim),이건창(G.C. Lee),이영신(Y.S. Lee) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
In this Study, in order to monitor the operational safety in wind turbine blade, damage detection technique was developed. The damage occurred in the blade was detected with measurement of local strain which was sensed with PVDF strain sensor. The blade components including trailing edge were manufactured. To detect the local damage, lots of strain gages and PVDF film sensors were mounted on the shear web and skin of the blade component. From the test, optimal location for detecting the occurrence of damage with static loading was investigated and sensitivity of the PVDF sensors location to the damage was examined. With increasing the applied load, pop-ins were happened. The strain variation of the PVDF sensors was characterized. From this study, PVDF strain sensor was found to be very useful in detecting the damage in wind turbine blade.
小型 高速 디젤機關의 排氣 排出物에 미치는 排氣 再循環率의 影響에 관한 實驗的 硏究
임재근(J.K. Lim),배명환(M.Wh.Bae),김종일(J.I.Kim) 군산대학교 수산과학연구소 1994 군산대학교 수산과학연구소 연구논문집 Vol.2 No.-
The effects of exhaust gas recirculation (EGR) on the characteristics of exhaust emissions and specific fuel consumption have been investigated using an eight-cylinder, four cycle, direct injection diesel engine operating at several loads and speeds. The experiments in this study are conducted on the fixed fuel injection timing of 38 BTDC regardless of experimental conditions. In conclusion, it is found that NOx emission is markedly reduced with the drop of burnt gas temperature at high speeds and loads especially as the EGR rate increases, while the soot particulate rise, with EGR rate and load at a given engine speed, especially high loads. The reduction of exhaust emissions within the Korea heavy duty diesel engine emission standards can be roughly achieved by the optimal EGR rate without degrading the specific fuel consumption, based on the correlations between exhaust emissions.
장방형내 함수 다공성 물질의 동결거동에 관한 실험적 연구
김병철,김종일,김진흥,Kim, B.C.,Kim, J.I.,Kim, J.H. 대한설비공학회 1991 설비공학 논문집 Vol.3 No.5
Freezing of saturated porous media contained in a rectangular cavity has been studied experimentally. Water and different diameter glass beads consitituted the liquid and porous media. Solidification front shape, the effects of bead diameter and initial liquid temperature was investigated. When the hot wall temperature was below $4^{\circ}C$, the freezing rate was higher at the top than at the bottom due to the density inversion, but with increasing the hot wall temperature the freezing rate at the top was effected by the liquid temperature and was lower than at the bottom. With increasing the bead diameter, the difference of freezing rate between top and bottom was increased and depends on thermal conductivity. When the liquid temperature was low in the beginning, the freezing rate was high, but with increasing the time almost the same with those of high temperature liquid.