http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
양희천(Hei Cheon Yang),박용신(Yong Sin Park),안정민(Jeong Min Ahn),조홍근(Hong Gyun Cho) 대한기계학회 2019 대한기계학회 춘추학술대회 Vol.2019 No.11
The aim of this study was to experimentally investigate the characteristics of entrainment and flow in a submerged horizontal two-phase jet using central driven air-water ejector. The streamwise velocity was measured by a propeller velocity meter, and the pressures of ejector were measured with a 5-channel digital pressure indicator. The air volume fraction was calculated by dividing the suction air flow rate by the air-water mixture flow rate. As the primary flow rate increases the entrainment ratio increases slightly. The discharge coefficient for characterizing the frictional losses in the ejector nozzle was about 0.62. It was found that the horizontal mixed jet behaved like a horizontal momentum jet or a buoyancy jet with the downstream distance or the primary flow rate.
팽루(Lu Peng),김동준(Dong-Jun Kim),양희천(Hei-Cheon Yang) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
The objective of this study is to investigate the air entrainment characteristics of a water-air ejector. The ejector consists of a primary nozzle, a suction tube, a parallel mixing tube and a diffuser. Experimental parameters are the primary nozzle diameter and position, the mixing tube length, the divergent angle and length of diffuser and the primary fluid pressure. The air entrainment ratio increased with the mixing tube length and the primary fluid flow rate, while the ratio decreased with the primary nozzle diameter and the divergent angle of diffuser. The air entrainment ratio increased with the primary nozzle position and the diffuser length, but the extent of the increase was relatively low compared to the values of the mixing tube length and the primary fluid flow rate.
장대호(Jang Dae-Ho),두화웨이(Du Huawei),김동준(Kim Dong-Jun),양희천(Yang Hei-Cheon) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
The aim of this study is to investigate the flow characteristics of two different type water-air ejectors. The ejectors consist of primary and suction nozzles, a parallel mixing tube and a diffuser. Experimental parameters are primary nozzle position (ejector pitch), mixing tube length, diffuser angle and length. The air entrainment ratio increased with the ejector pitch, the mixing tube length and the diffuser length, while the ratio decreased with the primary nozzle diameter and the diffuser angle for central driven ejector. The air entrainment ratio increased with the diffuser length and angle, while the ratio decreased with the ejector pitch and the mixing tube length for annular driven ejector.