표제지
목차
ABSTRACT 8
Ⅰ. 서론 9
1.1. 연구 배경 9
Ⅱ. 본론 13
2.1. Bellmouth 의 영향 13
2.2. 공기차단 흡입관 16
2.2.1. 공기차단 흡입관 16
2.3. 실험 장치 18
2.4. 실험결과 및 검토 21
2.4.1. 흡입,토출 유동의 관 내부 속도 분포 21
2.4.2. Case I 180도 후향 토출 26
2.4.3. Case II 135도 후향 토출 29
Ⅲ. 결론 33
참고문헌 34
Table 1. Velocity variation of suction duct 22
Table 2. Velocity variation of injection duct 23
Table 3. Velocity variation of suction duct at 0.284282m?s 24
Table 4. Number of Experiment 25
Table 5. Turbulent flow condition in the inner duct 25
Fig. 1. Polluted air generated work 10
Fig. 2. Be used ventilation system 11
Fig. 3. Shapes of bellmouth 13
Fig. 4. Streamlines on a straight circular suction duct and on a half circle bellmouth duct 14
Fig. 5. Streamlines of half circle bellmouth duct 15
Fig. 6. Streamlines of air-curtain duct 16
Fig. 7. Suction duc twith co-axial duct for air-curtain 17
Fig. 8. Detail shape of air-curtain duct 17
Fig. 9. Schematic Diagram of Experiment 18
Fig. 10. View of Experiment 19
Fig. 11. Inlet duct area 20
Fig. 12. Airflow Measuring 20
Fig. 13. Airchamber for injection 21
Fig. 14. Suction region at suction velocity 10m/s 26
Fig. 15. Suction region at suction velocity 14m/s 27
Fig. 16. Suction region at suction and injection velocity 10m/s 27
Fig. 17. Comparison of suction velocity with various injection velocity at radial direction 28
Fig. 18. Suction region at suction velocity 10m/s 30
Fig. 19. Suction region at suction velocity 14m/s 30
Fig. 20. Suction region at suction and injection velocity 10m/s 31
Fig. 21. Comparison of suction velocity with various injection velocity at radial direction 31