표제지
목차
Nomenclature 10
Abstract 11
제1장 서론 14
1.1. 연구 배경 14
1.2. 관련 연구 19
1.3. 연구범위와 목적 23
제2장 해양오염 방지용 오일펜스 25
2.1. 해양오염방제 방법 25
2.2. 오염지역 오일펜스 적용 및 구조 27
2.3. 오일펜스의 종류 29
2.4. 오일펜스의 전장 및 기능상실 31
2.5. 격벽 주위에 작용하는 힘과 유동 36
2.6. 해양오염방지 고찰 39
제3장 모델링 및 실험 41
3.1. 모델링 41
3.2. 수치해석 44
3.2.1. CFD 수치해석 44
3.2.2. 해석조건 및 경계 45
3.3. PIV 실험방법 47
3.3.1. PIV 개요 47
3.3.2. 실험조건 및 장치 49
3.3.3. 계측 방법 55
제4장 결과 및 고찰 57
4.1. 오일펜스 스커트 경사각에 따른 유동특성 57
4.1.1. 단일벽 주위 유동특성 57
4.1.2. 이중벽 주위 유동특성 74
4.2. 레이놀즈수에 따른 유동특성과 해양오염방지 90
4.3. 격벽 주위 수평속도성분 양상 130
4.3.1. 단일벽 주위 수평속도성분 130
4.3.2. 이중벽 주위 수평속도성분 133
4.4. 단일, 후방격벽 주위 제반 유동특성 평가 143
제5장 결론 158
참고문헌 160
Table 1.1. Marine accidents by sea area 14
Table 1.2. Marine accidents by type 15
Table 1.3. Occurrence of marine pollution accidents by oil tankers 15
Table 2.1. Specification of oil fence 28
Table 2.2. Materials of oil fence 28
Table 2.3. Curtain type of oil fence 29
Table 2.4. Fence type of oil fence 30
Table 2.5. Special type of oil fence 30
Table 3.1. Specification of CFD system 46
Table 3.2. Experimental conditions around bulkheads model 53
Table 3.3. Experimental conditions on single bulkhead slope 53
Table 3.4. Experimental conditions on rear bulkhead slope 53
Table 3.5. Measuring conditions of PIV 54
Fig. 2.1. Control methods oil pollution by location 26
Fig. 2.2. Components of oil fence 27
Fig. 2.3. Malfunction of oil fence 34
Fig. 2.4. Battlefield method considering strength in algae 35
Fig. 2.5. Boundary Layer 36
Fig. 3.1. Virtualbulkhead flow visualization according to flow rate 41
Fig. 3.2. Average velocity distribution by around bulkheads 42
Fig. 3.3. Streamline by around bulkheads 42
Fig. 3.4. Conception of oil fence rear bulkhead deformationmodel 43
Fig. 3.5. Mesh component of CFD 46
Fig. 3.6. Flow visualization and PIV relationship 48
Fig. 3.7. Measuring principle of velocity vectorin PIV 48
Fig. 3.8. Production of bulkhead by slope 10˚, 20˚, 30˚, 45˚ 51
Fig. 3.9. Fixing device for circulating water tank and bulkheads 51
Fig. 3.10. Fixing device for circulating water tank and bulkheads 52
Fig. 3.11. Flow field imaging device and image 52
Fig. 3.12. PIV device and instrumentation schematic 56
Fig. 4.1. Average velocity distribution by single bulkhead at PIV 63
Fig. 4.2. Average velocity distribution by single bulkhead at CFD 65
Fig. 4.3. Streamline in the flow field by single bulkhead at PIV 67
Fig. 4.4. Streamline by single bulkhead at CFD 69
Fig. 4.5. Flow field distribution by single bulkhead at PIV 71
Fig. 4.6. Flow field distribution by single bulkhead at CFD 73
Fig. 4.7. Average velocity distribution by around bulkheads at PIV 79
Fig. 4.8. Average velocity distribution by around bulkheads at CFD 81
Fig. 4.9. Streamline by around bulkheads at PIV 83
Fig. 4.10. Distribution of streamline by around bulkheads at CFD 85
Fig. 4.11. Flow field distribution by around bulkheadsat PIV 87
Fig. 4.12. Flow field distribution by around bulkheads at CFD 89
Fig. 4.13. Average velocity distribution at 10˚ to PIV 95
Fig. 4.14. Average velocity distribution at 20˚ to PIV 97
Fig. 4.15. Average velocity distribution at 30˚ to PIV 99
Fig. 4.16. Average velocity distribution at 10˚ to CFD 101
Fig. 4.17. Average velocity distribution at 20˚ to CFD 103
Fig. 4.18. Average velocity distribution at 30˚ to CFD 105
Fig. 4.19. Distribution of streamline at 10˚ to PIV 107
Fig. 4.20. Distribution of streamline at 20˚ to PIV 109
Fig. 4.21. Distribution of streamline at 30˚ to PIV 111
Fig. 4.22. Distribution of streamline at 10˚ to CFD 113
Fig. 4.23. Distribution of streamline at 20˚ to CFD 115
Fig. 4.24. Distribution of streamline at 30˚ to CFD 117
Fig. 4.25. Flow field distribution at 10˚ to PIV 119
Fig. 4.26. Flow field distribution at 20˚ to PIV 121
Fig. 4.27. Flow field distribution at 30˚ to PIV 123
Fig. 4.28. Flow field distribution at 10˚ to CFD 125
Fig. 4.29. Flow field distribution at 20˚ to CFD 127
Fig. 4.30. Flow field distribution at 30˚ to CFD 129
Fig. 4.31. Horizontal mean U-velocity distribution at y/H=2.5 point 131
Fig. 4.32. Horizontal mean U-velocity distribution at y/H=1 point 132
Fig. 4.33. Mean U-velocity distribution in bulkheads at location 2.5 136
Fig. 4.34. Mean Velocity distribution in bulkheads at location 2.5 138
Fig. 4.35. Mean U-velocity distribution in bulkheads at location 1 140
Fig. 4.36. Mean Velocity distribution in bulkheads at location 1 142
Fig. 4.37. Velocity field at Re=2.37x10⁴ in PIV 147
Fig. 4.38. Kinetic energy at Re=2.37x10⁴ in PIV 149
Fig. 4.39. Vortex distribution at Re=2.37x10⁴ in PIV 151
Fig. 4.40. Kinetic energy by around bulkheads at 20˚ to PIV 153
Fig. 4.41. Vortex distribution by around bulkheads at 20˚ to PIV 155
Fig. 4.42. Vortex distribution by around bulkheads at 20˚ to CFD 157