원문정보
A Study on Velocity Distribution Characteristics of Exit Section and Downstream Straight Length in Square Curved Duct According to Angle Shape
초록
영어
Through this study, velocity distribution characteristics of exit section and downstream straight length of square sectional 180° and 90° curved ducts were numerically analyzed with RSM (Reynolds Stress Model) by changing various flow parameters such as air velocity, surface roughness and hydraulic diameter etc. As a result of it, the maximum velocity profiles according to air velocity in 180° and 90° curved ducts were indicated at Y/D=0.8 and X/D=0.7 region. Also, the efficient measuring location in bended duct downstream was able to suggest when the most stable straight duct length in flow deviations were indicated at L/D=30 and L/D=10 region, and the standard deviation characteristics according to hydraulic diameter were mostly indicated at L/D=15∼30 and L/D=10 region considering minimum deviations in the same velocity condition.
목차
1. 서론
2. 이론해석
2.1 해석모델
2.2 지배방정식
2.3. 수치해석
2.4 난류모델의 타당성 검증
3. 결과 및 고찰
3.1 각도형상에 따른 속도분포 특성
3.2 입구속도 변화에 따른 속도분포 특성
3.3 표면거칠기 변화에 따른 속도분포 특성
3.4 곡관하류의 직관거리에 따른 표준편차분포
3.5 수력직경에 따른 직관부의 표준편차분포
4. 결론
References