표제지
초록
Abstract
목차
기호 12
제1장 서론 13
1.1. 연구 배경 13
1.2. 연구 동향 14
1.3. 연구 목표 24
제2장 연구 방법 26
2.1. 실험장치 구성 26
2.2. 유동해석 기법 27
제3장 자발점화 억제 방안 32
3.1. 구동형 핀틀을 사용한 압력 릴리프 32
3.1.1. 실험 구성 32
3.1.2. 실험 결과 33
3.1.3. 순간적인 누출과의 충격파 거동 차이 37
3.1.4. CFD 해석 결과 38
제4장 관 내 화염 소염 방안 47
4.1. 다공성 구조물을 사용한 관 내 화염 소염 방안 47
4.1.1. 다공성 구조물 선정 47
4.1.2. 실험 구성 48
4.1.3. 실험 결과 49
4.1.4. 반사충격파의 영향 64
제5장 결론 66
참고 문헌 68
Table 1. Total Experiment Result 35
Table 2. Shock speed by CFD result 39
Table 3. Porous structure properties 48
Table 4. Experiment Pcritical [bar][이미지참조] 53
Table 5. Experiment Pcritical [bar][이미지참조] 58
Figure 1. Statistics on hydrogen incidents. (a) Incident location. (b) Incident equipment, (c) Probable causes, (d) Damage and injuries. 14
Figure 2. Sustained turbulent diffusion flame by High-pressure hydrogen Self- ignition (a) 43.1 atm using 5.08 cm model (b) 86.1 atm with constant diameter... 15
Figure 3. Spontaneous ignition tendency by release pressure and tube length 16
Figure 4. Schematic of flow in Omega tube 17
Figure 5. Self-ignition occurrence (a) ignition occurrence of two different pipe (b) ignition occurrence associated with burst pressure and the angle 18
Figure 6. Study on variable contraction tube 19
Figure 7. Self ignition characteristics of obstacles inside the tube 20
Figure 8. Effect of a wall on the self-ignition 21
Figure 9. Effect of opening area on the suppression of self-ignition 22
Figure 10. Self-ignition occurrence on different burst disk 23
Figure 11. Self-ignition occurrence on impurity gas addition 24
Figure 12. Experimental apparatus 27
Figure 13. Geometry for analysis of pintle movement 30
Figure 14. Mesh for analysis of pintle movement 31
Figure 15. Schematic of shock tube operation[내용없음] 9
Figure 16. Schematic of Experiment apparatus(pintle) 32
Figure 17. Experimental apparatus(pintle) 33
Figure 18. Pressure relief device using pintle 33
Figure 19. Pressure plot by Experiment result 36
Figure 20. Shadowgraph image 37
Figure 21. Comparison with sudden release 38
Figure 22. Pressure data plot of CFD result 40
Figure 23. Temperature data of CFD result 41
Figure 24. Flow scene at 1.125e-4 s 43
Figure 25. Flow scene at 4.75e-4 s 44
Figure 26. Flow scene at 1.1e-3 s 45
Figure 27. Schematic of experiment apparatus (Flame Arrester) 49
Figure 28. Total Experiment result 50
Figure 29. Flame tendency with increased burst pressure in same structure 52
Figure 30. Experiment result (Effect of structure's porosity and length) 54
Figure 31. Flame tendency with porosity of the structure 55
Figure 32. Experiment result (Effect of structure's pattern and length) 57
Figure 33. Shadowgraph image 57
Figure 34. Pressure and Light intensity plot (a) HC2 (50 mm) (b) OT (30 mm) 58
Figure 35. HC2 structure's Flame quenching tendency at tube outlet 61
Figure 36. Structure's Flame quenching tendency at tube outlet 62
Figure 37. Quenching type of porous structure 63
Figure 38. Self-ignition by reflected shock. (a) HC2(30 mm), (b) HC4(30 mm) 65
Figure 39. Direct image (a) HC2(30 mm), (b) HC4(30 mm) 65