표제지
목차
약기호표 8
국문 요약 9
Abstract 10
제1장 서론 11
제2장 이론적 고찰 14
2.1. 베르누이 방정식 14
2.2. 벤츄리 효과 14
2.3. 비압축성 유체 제트유동 15
제3장 연구 방법 17
3.1. 유동해석 영역과 경계조건 18
3.2. 격자 의존성 시험 20
3.3. 성능 함수 20
제4장 해석결과 22
4.1. 벤츄리관 유·무에 따른 유동 해석 결과 22
4.2. 노즐-벤츄리관 목 단면적 비(At/An) 변화에 따른 유동 특성(이미지참조) 23
4.3. 노즐 출구-벤츄리관 입구 거리(d) 변화에 따른 유동 특성 24
4.4. 벤츄리관 디퓨져 확산각(θ) 변화에 따른 유동 특성 25
제5장 결론 54
참고문헌 55
Table 1. Properties of LNG 27
Table 2. Design specifications of venturi pipe 28
Table 3. Geometric parameters of venturi pipe 29
Fig. 1. Type of tank mixing equipment 30
Fig. 2. Mechanism of roll-over in LNG storage tank 31
Fig. 3. Jet mixing nozzle in LNG storage tank 32
Fig. 4. Schematics of jet mixer with venturi pipe 33
Fig. 5. Computational domain and boundary conditions 34
Fig. 6. Grid system 35
Fig. 7. Grid dependency test 36
Fig. 8. Static Pressure and velocity of the jet mixer without venturi pipe 37
Fig. 9. Static Pressure and velocity of the jet mixer with venturi pipe 38
Fig. 10. Static Pressure and velocity vector distributions... 39
Fig. 11. Comparison of velocity contours between the jet mixer with and... 40
Fig. 12. Comparison of velocity distributions between the jet mixer with and... 41
Fig. 13. Effects of venturi pipe throat area ratio on mixing performance 42
Fig. 14. Effects of venturi pipe throat area ratio on velocity... 43
Fig. 15. Effects of venturi pipe throat area ratio on velocity distributions... 44
Fig. 16. Effects of venturi pipe throat area ratio on static pressure... 45
Fig. 17. Effects of distance between nozzle and venturi pipe... 46
Fig. 18. Effects of distance between nozzle and venturi pipe on velocity... 47
Fig. 19. Effects of distance between nozzle and venturi pipe... 48
Fig. 20. Effects of distance between nozzle and venturi pipe... 49
Fig. 21. Effects of venturi pipe diffuser angle on mixing performance 50
Fig. 22. Effects of venturi pipe diffuser angle on velocity... 51
Fig. 23. Effects of venturi pipe diffuser angle on velocity distributions... 52
Fig. 24. Effects of venturi pipe diffuser angle on static pressure... 53