http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
워터젯 노즐의 길이와 내부 나선 구조 유무에 따른 유체거동에 관한 전산해석
곽청렬(Cheong-Yeol Gwak),신보성(Bo-Sung Shin),고정상(Jeung-Sang Go),김문정(Moon-Jeong Kim),유찬주(Chan-Ju Yoo),윤단희(Dan-Hee Yun) 한국기계가공학회 2017 한국기계가공학회지 Vol.16 No.1
It is well known that water jetting is now widely used in the advanced cutting processes of polymers, metals, glass, ceramics, and composite materials because of some advantages, such as heatless and non-contacting cutting different from the laser beam machining. In this paper, we proposed the simulation model of waterjet by lengths and the inner spiral structure of the nozzle. The simulation results show that the outlet velocity of the nozzle is faster than the inlet. Furthermore, we found rapid velocity reduction after passing through the outlet. The nozzle of diameter ϕ500 and length 70mm, shows the optimal fluid width and velocity distribution. Also, the nozzle with inner spiral structure shows a Gaussian distribution of velocity and this model is almost twice as fast as the model without spiral structure, within the effective standoff distance (2.5 mm). In the future, when inserting abrasive material into the waterjet, we plan to analyze the fluid flow and the particle behavior through a simulation model.