http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
연신 heat plate 온도가 폴리에스터 섬유의 구조와 염색성에 미치는 영향
조현태,김우섭,Cho Hyeon Tae,Kim Woo Sup 한국섬유공학회 2005 한국섬유공학회지 Vol.42 No.1
Effects of heat-set temperature in yarn formation process on the structure and properties of two different polyester fibers, undrawn yarn (UDY) and partially-oriented yarn (POY), were investigated. Drawing temperature was fixed at $80^{\circ}C$ for UDY and $90^{\circ}C$ for POY which had been determined as the optimum temperature in a previous study. The heat plate temperature was varied by $5^{\circ}C$ intervals near the critical crystallization temperature ($T_{cc}$) of polyester in order to determine the effects of the temperature changes on the orientation, crystallization, fiber evenness, mechanical and dyeing properties of the polyester fibers. Results indicated that the heat plate temperature did not have a great effect on the mechanical properties and evenness of the fibers. However, a marginal reduction of dye exhaustion and dyeing rate was caused with increase in heat plate temperature. These effects were discussed with respect to the structural changes of the fibers in the fiber formation process.
金春中,金宇燮 영남이공대학 1990 論文集 Vol.19 No.-
The mechanism of flame front propagation in closed chamber is one of the most complicated phenomena in the field of combustion Ignition mechanism of main chamber mixture and the intensity of the turbulent combustion seem to be greatly influenced by the Jet. The experiment of the turbulent combustion is run using the apparatus which can generate turbulence by moving rapidly a perforated plate. Combustion process and flame in the chamber have been investigated by taking pressure, combustion time, schuieren photographs of the flame.
이장환,김우섭 영남이공대학 1988 論文集 Vol.17 No.-
In the present study, motions of two vortices Iocated in the internal region of a circular cylinder were investigated. The governing equations are of Lagrangian system, which_were solved by the fourth order Runge-Kutra method. One vortex has unit circulation and_the other one has several strength of circulation, and they initially locate at the symmetrical positions. When two vortices have same direction and strength, they rotate at same speed and make circular orbits. But when their strength are different, the speed of weaker vortex become slow down, and the stonger one follows up the other and they change the other's orbit. When only the directions of two vortices are different, they make half-circle orbits, and rotate periodically. But their strengths are different, they make several type orbits, the, may be a posibility of chaotic motion. And when their initial positions are located close enough, they rotate each other making small hoop, simultaneously rotate round the center of the cylinder wall.