http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
평균 양방향 튜브의 설계 최적화를 위한 FLUENT 코드해석
강경호(Kyong-Ho Kang),윤병조(Byong-Jo Yun),어동진(Dong-Jin Euh),백원필(Won-Pil Baek) 한국유체기계학회 2004 유체기계 연구개발 발표회 논문집 Vol.- No.-
Average Bi-directional flow tube was suggested to measure single and two phase flow rate. Its working principle is similar with Pitot tube, however, it makes it possible to eliminate the cooling system which is normally needed to prevent from flashing in the pressure impulse line of Pitot tube when it is used in the depressurization condition. 3-dimensional steady state flow analyses using FLUENT 5.4 code were performed to validate the application of the average bi-directional flow tube in case of water and air flow. In this study, sensitivity studies have been performed to optimize the design features of the average bi-directional flow tube which can be applied for the various experimental conditions. For Re numbers above 1000, the k values are nearly constant regardless of the Re numbers and flow types and calculation results and experimental data coincides quite well. The current FLUENT calculation results suggest that linearity of the k values in various design features of the average BDFT is highly promising, which means that it is quite reasonable to select the typical design of the average BDFT for the convenience of the experimental conditions.
집중권 방식 영구자석 동기전동기의 냉각특성 개선에 관한 연구
강경호(Kyong-Ho Kang),안수홍(Su-Hong Ahn),윤영득(Young-Duk Yoon),유석진(Suk-Jin Yu),안효철(Hyo-Chul Ahn) 대한전기학회 2012 전기학회논문지 Vol.61 No.4
This paper presents a thermal analysis of an interior PM synchronous machine with concentrated winding for electric vehicle. The conventional thermal equivalent network model has been used for a long time for calculation of the temperature rises in electrical machines. In spite of being popular, this method can not be applied correctly for elements with complicated cooling structure like liquid cooled housing. To overcome this drawbacks, in this paper, a hybrid thermal model using the result of CFD analysis partly. Using this method, to improve a thermal performance of PMSM with concentrated winding, the effects of two design parameters are analysed. Finally, the accuracy of this model has been verified by experiments for the developed 21kW motor.