http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
백민식(Min-Sik Pack),이시연(Si-Yeon Lee),양보석(Bo-Suk Yang),최성철(Sung-Choul Choi),이재근(Jae-Geun Lee) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.11
This paper presents a control plan of clearances for power plant steam turbine with the characteristics of internal clearances. Internal clearances on the interstage of blades and shaft gland seals on the steam turbine which are installed in tandem compound was changed when the rotor turned in the cylindrical sleeve bearing due to the generation of oil film wedge. This presented concern is very useful to prevent the rubbing damage of seal edge between the fixed and moving parts in steam turbine due to the misalignment at the rotating and stationary parts. This method is applied for the unbalanced clearances distribution to the left and right sides in the turbine casing. A considerable amount of unbalanced clearances distribution trend is determined according to the rotating speed of shaft, bearing size, type of journal bearing, bearing load, lubrication oil viscosity, oil temperature, oil pressure and surface roughness of shaft.
박은희(Une-Hee Park),이현우(Hyun-Woo Lee),최성철(Sung-Choul Choi),정경훈(Kyung-Hun Jeng) 한국자동차공학회 2003 한국자동차공학회 지부 학술대회 논문집 Vol.2003 No.10
Numerical investigation of the effects of the velocity was executed in the turbulent flow field. It was found that the pressure drop in the velocity media depends linearly on the face velocity. The flow field in the fluidics valve with constant flow velocity of control port and the varying flow velocity of supply port were simulated by finite volume method. The unsteady wake enhance the tuebulence motion in the cascade passage and influences the flow separation in the suction surface. The resulting in a relative narrow wake and hence the time mean pressure drop on rear face of the trim prism is increased with the control valve trim. A precautionary messure is also preformed to help service engineers.<br/>