표제지
요약
목차
1. 서론 16
1.1. 연구배경 16
1.2. 연구동향 17
1.3. 연구목적 19
2. 웨지 와이어 스크린의 해석 20
2.1. 구조해석 20
2.2. 지지 위치 결정을 위한 웨지 와이어의 구조해석 26
2.3. 지지 위치 결정을 위한 웨지 와이어의 모달해석 29
2.4. 지지 위치에 따른 웨지 와이어의 구조해석 33
2.4.1. 수평방향 위치(case I) 33
2.4.2. 수직방향 위치(case II) 34
2.5. 지지 위치에 따른 웨지 와이어의 모달해석 37
2.6. 웨지 와이어 스크린 필터의 구조해석 45
2.7. 요약 및 고찰 48
3. 스트레이너의 구조해석 49
3.1. 웨지 와이어 적용 스트레이너 설계 49
3.2. 스트레이너 바디의 안정성 평가 52
3.3. 스크린 필터의 안정성 평가 55
3.4. 요약 및 고찰 59
4. 스트레이너의 유동해석 60
4.1. 유동해석 모델 60
4.2. 유량에 따른 스트레이너의 유동특성 66
4.2.1. 용량 250m³/h 67
4.2.2. 용량 500m³/h 73
4.2.3. 용량 750m³/h 79
4.2.4. 스트레이너의 차압해석 84
4.3. 불순물에 의한 스트레이너의 유동특성(용량 250m³/h) 87
4.3.1. 유량 100m³/hr 87
4.3.2. 유량 250m³/hr 93
4.3.3. 유량 350m³/hr 97
4.3.4. 용량 250m³/h의 해석 결과 102
4.4. 불순물에 의한 스트레이너의 유동특성(용량 500m³/h) 103
4.4.1. 유량 400m³/hr 103
4.4.2. 유량 500m³/hr 108
4.4.3. 유량 600m³/hr 113
4.4.4. 용량 500m³/hr 해석 결과 118
4.5. 불순물에 의한 스트레이너의 유통특성(용량 750m³/h) 119
4.5.1. 유량 600m³/hr 119
4.5.2. 유량 750m³/hr 124
4.5.3. 유량 900m³/hr 129
4.5.4. 용량 Q750 해석 결과 134
4.6. 요약 및 고찰 135
5. 결론 136
참고문헌 138
Abstract 142
Table 2.1. Material property of wedge wire 22
Table 2.2. Structural analysis results of screen filter and single support rod(6m) 24
Table 2.3. Support rod structural analysis result 28
Table 2.4. Structural analysis results according to support position 36
Table 2.5. Structural analysis results of screen filter and single support rod(support B) 47
Table 3.1. Results of structural analysis of wedge wire strainer 58
Table 4.1. Strainer models for analysis 62
Table 4.2. Mesh information for strainers 64
Table 4.3. Result of fluid-flow analysis for Q250 strainer 70
Table 4.4. Fluid-flow analysis result(Q500 strainer) 76
Table 4.5. Flow analysis result(capacity 750) 82
Table 4.6. Result of pressure drop for strainer 84
Table 4.7. Resistance value 87
Table 4.8. Result of fluid-flow analysis(Q250) 94
Table 4.9. Pressure drop according to impurity(Q250) 102
Table 4.10. Maximum velocity according to impurity(Q250) 102
Table 4.11. Pressure drop according to impurity(Q500) 118
Table 4.12. Max. velocity according to impurity(Q500) 118
Table 4.13. Pressure drop according to impurity(Q750) 134
Table 4.14. Maximum velocity according to impurity(Q750) 134
Fig. 2.1. Wedge wire screen 20
Fig. 2.2. Finite element modeling of wedge wire screens 21
Fig. 2.3. Structural analysis result of wedge wire screen 21
Fig. 2.4. Wedge wire dimension 22
Fig. 2.5. Structural analysis result of support rod(6m screen) 23
Fig. 2.6. Result of structural analysis of single support rod 24
Fig. 2.7. Deflection variation with wedge wire position 25
Fig. 2.8. Single support rod modeling and boundary conditions 26
Fig. 2.9. Maximum deflection and stress analysis(case I) 27
Fig. 2.10. Maximum deflection and stress analysis(case II) 27
Fig. 2.11. Support rod modal analysis result(6m support rod) 29
Fig. 2.12. Vibration mode shape(bending vibration y-direction) 30
Fig. 2.13. Vibration mode shape (lateral vibration z-direction) 30
Fig. 2.14. Comparison of natural frequency analysis result and rotation speed of support rod 31
Fig. 2.15. Support positions of wedge wire support rod 32
Fig. 2.16. Structural analysis result for support A(case I) 33
Fig. 2.17. Structural analysis result for support B(case I) 33
Fig. 2.18. Structural analysis result for support C(case I) 34
Fig. 2.19. Structural analysis result for support A(case II) 35
Fig. 2.20. Structural analysis result for support B(case II) 35
Fig. 2.21. Structural analysis result for support C(case II) 36
Fig. 2.22. Support rod modal analysis result(Support A) 37
Fig. 2.23. Vibration mode shape(bending vibration y-dir., support A) 38
Fig. 2.24. Vibration mode shape(lateral vibration z-dir., support A) 38
Fig. 2.25. Comparison of natural frequency analysis result and rotation speed of support rod(support A) 39
Fig. 2.26. support rod modal analysis result(Support B) 39
Fig. 2.27. Vibration mode shape(bending vibration y-dir., support B) 40
Fig. 2.28. Vibration mode shape(lateral vibration z-dir., support B) 41
Fig. 2.29. Comparison of natural frequency analysis result and rotation speed of support rod(support B) 42
Fig. 2.30. Support rod modal analysis result(support C) 42
Fig. 2.31. Vibration mode shape(bending vibration y-dir., support C) 44
Fig. 2.32. Comparison of natural frequency analysis result and rotation speed of support rod(support C) 44
Fig. 2.33. Structural analysis result of screen filter(Q250 and Q500) 45
Fig. 2.34. Structural analysis result of screen filter(Q750, MEGA type) 46
Fig. 3.1. Strainer with wedge wire screen 50
Fig. 3.2. 3D modeling of wedge wire screen filter 51
Fig. 3.3. 3D modeling of strainer body 51
Fig. 3.4. FE modeling of strainer body 52
Fig. 3.5. Boundary conditions for structural analysis 53
Fig. 3.6. Convergence result for analysis 53
Fig. 3.7. Total deformation(mm, Max. 0.46mm) 54
Fig. 3.8. Total stress(MPa, Max. 92.4MPa) 54
Fig. 3.9. FE modeling of screen filter 55
Fig. 3.10. Boundary conditions for structural analysis 56
Fig. 3.11. Analysis result case I(Max. deformation : 0.09 mm, Max. stress : 74.3 MPa) 57
Fig. 3.12. Analysis result case II(Max. deformation : 0.13mm, Max. stress : 174.9MPa) 58
Fig. 4.1. 2D modeling for three types of strainer 61
Fig. 4.2. 3D model of the fluid part(Q250) 63
Fig. 4.3. FE modeling of strainer 63
Fig. 4.4. Porosity 65
Fig. 4.5. Circularity value 66
Fig. 4.6. Section of strainer 66
Fig. 4.7. Fluid-flow analysis result(υi=0.9m/s, flow rate 100m³/h)[이미지참조] 67
Fig. 4.8. Fluid-flow analysis result(υi=2.2m/s, flow rate 250m³/h)[이미지참조] 68
Fig. 4.9. Fluid-flow analysis result(υi=3.1m/s, flow rate 350m³/h)[이미지참조] 69
Fig. 4.10. Pressure drop ratio for strainer(capacity 250m³/h) 71
Fig. 4.11. Pressure drop and velocity variation according to flow rate(Q350 strainer) 72
Fig. 4.12. Fluid-flow analysis result(υi=2.30 m/s, flow rate 400 m³/hr)[이미지참조] 73
Fig. 4.13. Fluid-flow analysis result(υi=2.88m/s, flow rate 500m³/h)[이미지참조] 74
Fig. 4.14. Fluid-flow analysis result(υi=3.45m/s, flow rate 600m³/h)[이미지참조] 75
Fig. 4.15. Pressure drop ratio for strainer(capacity 500m³/h) 77
Fig. 4.16. Fluid-flow analysis result(capacity 500m³/h) 78
Fig. 4.17. Fluid-flow analysis result(υi=2.36 m/s, flow rate 600 m³/h)[이미지참조] 79
Fig. 4.18. Fluid-flow analysis result(υi=2.95 m/s, flow rate 750 m³/h)[이미지참조] 80
Fig. 4.19. Fluid-flow analysis result(υi=3.54 m/s, flow rate 900 m³/h)[이미지참조] 81
Fig. 4.20. Pressure drop ratio for strainer(capacity 750 m³/h) 82
Fig. 4.21. Fluid-flow analysis result(capacity 750 m³/h) 83
Fig. 4.22. Flow analysis result for strainer 85
Fig. 4.23. Pressure drop ratio of strainer 86
Fig. 4.24. Pressure distribute according to resistance ratio(Q100) 88
Fig. 4.25. Velocity distribute according to resistance ratio(Q100) 89
Fig. 4.26. Pressure drop and velocity according to resistance(Q100) 90
Fig. 4.27. Pressure drop ratio according to resistance(Q100) 91
Fig. 4.28. Pressure distribution according to resistance ratio(Q250) 92
Fig. 4.29. Velocity distribute according to resistance ratio(Q250) 93
Fig. 4.30. Pressure drop and velocity according to impurity(Q250) 95
Fig. 4.31. Pressure drop ratio according to resistance(Q250) 96
Fig. 4.32. Pressure distribution according to resistance ratio(Q350) 98
Fig. 4.33. Velocity distribute according to the resistance ratio(Q350) 99
Fig. 4.34. Pressure drop and velocity according to impurity 100
Fig. 4.35. Pressure drop ratio according to resistance(Q350) 101
Fig. 4.36. Pressure distribution according to resistance ratio(Q400) 104
Fig. 4.37. Velocity distribute according to resistance ratio(Q400) 105
Fig. 4.38. Pressure drop and velocity according to impurity(Q400) 106
Fig. 4.39. Pressure drop ratio according to resistance(Q400) 107
Fig. 4.40. Pressure distribute according to resistance ratio(Q500) 109
Fig. 4.41. Velocity distribute according to resistance ratio(Q500) 110
Fig. 4.42. Pressure drop and velocity according to impurity(Q500) 111
Fig. 4.43. Pressure drop ratio according to resistance(Q500) 112
Fig. 4.44. Pressure distribute according to resistance ratio(Q600) 114
Fig. 4.45. Velocity distribution according to resistance ratio(Q600) 115
Fig. 4.46. Pressure drop and velocity according to impurity(Q600) 116
Fig. 4.47. Pressure drop ratio according to resistance(Q600) 117
Fig. 4.48. Pressure distribute according to resistance ratio(Q600) 120
Fig. 4.49. Velocity distribution according to resistance ratio(Q600) 121
Fig. 4.50. Pressure drop and velocity according to impurity(Q600) 122
Fig. 4.51. Pressure drop ratio according to resistance(Q750, 600m³/hr) 123
Fig. 4.52. Pressure distribute according to resistance ratio(Q600) 125
Fig. 4.53. Velocity distribution according to resistance ratio(Q750) 126
Fig. 4.54. Pressure drop and velocity according to impurity(Q750) 127
Fig. 4.55. Pressure drop ratio according to resistance(Q750) 128
Fig. 4.56. Pressure distribute according to the resistance ratio(Q900) 130
Fig. 4.57. Velocity distribution according to resistance ratio(Q900) 131
Fig. 4.58. Pressure drop and velocity according to impurity(Q900) 132
Fig. 4.59. Pressure drop ratio according to resistance(Q900) 133