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[열유체부문] 수치적 기법을 이용한 자동차 Defrost 노즐 유동을 위한 설계인자 연구
배인호(Inho Bae),강규태(Kutae Kang),황지은(Jieun Hwang),박원규(Warngyu Park),장기룡(Kilyong Jang) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.11_1
Velocity profile and its magnitude affect greatly to defrosting and demisting in the windshield. In this paper, the three dimensional flow analysis in the defrost nozzle which is geometrically complicated was performed to investigate and predict velocity profile of the nozzle outlet. The three dimensional Navier-Stokes code used in this case was validated by performing Of the generic A/C duct flow analysis successfully. The results of defrost nozzle flow analysis nearly coincided with experimental data. Based on the standard case, design factors were applied. Flow analysis was carried out with three different number of the guide vanes. The angle of the guide vane was applied to the nozzle outlet also. In the flow simulation inside the automotive, inlet velocity was provided by a exit velocity of the defrost nozzle. The investigation of the each case informed us which case could produce the best velocity profile to defrost. Through these procedure, the optimized design factor was found. Further more, this three dimensional incompressible code will be used to predict and compare with any kind of defrost nozzle flow.
[안전부문] 수치해석 기법을 이용한 자동차 전방유리면의 해빙해석
황지은(Jieun Hwang),김규태(Kyutae Kang),배인호(Inho Bae),박원규(Wamgyu Park),장기룡(Kilyong Jang) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.11_2
For windshield defrosting, flow analysis of inner room(vehicle) and heat conduction on the windshield surface are undertaken. The temperature field and melting pattern inside of cavity was analyzed for code validation. The defrosting process is three dimensional phenomena and phase is changing. The result of defrosting analysis well shows the phase change. The present code shows a good agreement with of the numerical and experimental results. Therefore these results offer basic design tool for defrost analysis of windshield.
김주영(Jooyoung Kim),김준홍(Joonhong Kim),한명철(Myungchul Han),박원규(WarnGyu Park),장기룡(Kilyong Jang) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Since the mist of the automobile windshield interferes the driver's sight and safety, it is needed to develop an automatic de-mist equipment with coupling of the Automatic Temperature Control (ATC) unit of an automobile. To be able to coupling between units, we have used RS232C and made the interface board which can communicate between them despite of the difference of communication speed. The Mist possibility (MP) was as the difference of temperature between the dew point and the surface temperature of windshield glass. The automatic de-mist control system begins to operate before the mist covers the inner windshield glass. It was observed that the automatic de-mist control system operates well and removes quickly the mist as long as possible.