정사각형 단면의 270도 곡관에서의 난류유동 특성에 관한 수치 해석 = Numerical investigation of Turbulent Flows in a Square Sectioned 270˚ Bend

다국어 초록 (Multilingual Abstract)

This paper represents computations of the interaction between measurement and numerical computation of turbulent flow in a square sectioned 270° bend flow. RNG turbulent model was adapted and compared with the experiential data and the result of standard k-ε turbulent model. RNG turbulent model showed better agreement with the experimenal data than the standard k-ε turbulent model in the prediction of the mean velocity profiles. The present results show that the secondary flow appears very large value in the neighbor region of inner wall, and have a good agreement with the experimental data. The strong secondary flow occurred when the flow passed in the region of 90 degree to 135 degree.