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최현준(H. J. Choi),이상문(S. M. Lee),남문희(M. H. Nam),이영호(Y. H. Lee) 한국동력기계공학회 2009 한국동력기계공학회 학술대회 논문집 Vol.2009 No.11
The current study looks at the flow characteristics in a burner model using PIV. PIV(Particle Image Velocimetry) measurements is an optical method of fluid visualization. It is used to provide qualitative understanding about the spatial distribution and quantitative information about flow. The combustor currently studied had two sets of inlets, first inlet and second inlet. First inlet had 6 holes while two different second inlet configuration was studied, 10 hole and 15 hole. Aluminum powder was used as the seeded particle and the flow rate was kept constant at 40L/min. The first inlet was moved in increments towards the second inlet to see how the flow modifies and obtain the best position and the best second inlet configuration. Information regarding the flow field such as average velocity is presented for both the models in this paper.
형상정밀도 예측을 위한 780MPa급 차체부품의 스프링백 해석
최현준(H. J. Choi),전용준(Y. J. Jun),김세호(S. H. Kim),김기풍(K. P. Kim),김동환(D. H. Kim),임용희(Y. H. Lim) 한국소성가공학회 2011 한국소성가공학회 학술대회 논문집 Vol.2011 No.5
Finite element stamping analysis is carried out for the side sill inner member of an auto-body with a 780 MPa-grade high strength steel sheet in order to predict the spring-back phenomena accurately. The springback mechanism is investigated in the cross section of the stamped product quantitatively and the amount of the compensation angle is predicted to correct the unexpected shape inaccuracy. Parameters for the accuracy measurement such as gap and flush are calculated in the simulation and it is confirmed that the simulation result shows good agreement with the experimental one within ±1 mm tolerance.