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Ⅰ. 서론 8

Ⅱ. 이론 14

2.1 충격파 점화에 의한 폭굉 14

2.2 충격파와 폭굉파의 역학 17

2.3 충격관에서의 충격파 특성 24

가. 입사 충격파 26

나. 반사충격파 29

2.4 화학반응 및 컴퓨터 모델링 32

Ⅲ. 실험 36

3.1 실험장치 및 시료제조 36

3.2 실험조작 및 측정 36

3.3 반사충격파 파라메터 및 컴퓨터 모델링 38

Ⅳ. 결과 및 고찰 40

4.1 폭굉의 점화지연 40

4.2 폭굉반응속도론 53

Ⅴ. 결론 67

참고문헌 69

Abstract 74

Table 1. Experimental conditions for C₂H₄O-O₂-Ar mixtures behind reflected shock(P₁=100 torr). 37

Table 2. Ignition delay times in ethylene oxide-oxygen-argon mixtures behind reflected shocks. 43

Table 3. Comparison of delay kinetics of ethylene oxide with some compounds of interest. 51

Table 4. Reaction Scheme Describing the Detonation of Ethylene Oxide-Oxygen-Argon Mixtures behind Reflected Shock. 57

Fig.1. The initiating of detonation. Highly luminous areas are shaded. 15

Fig.2. P, 1/ρdiagram for each compression conditions in nonreactive gas. 20

Fig.3. Hugoniot curve illustrating the hypothetical Chapman-Jouguet detonation state J. 20

Fig.4. Hugoniots illustrating variation inthe state of a gas on passing through a detonation wave-front to reach the C-J state. 23

Fig.5. (a) An x, t diagram showing progress of the shock wave. Possible wave systems produced by the collision of a reflected shock wave and a contact surface, rarefracti on wave. (b) The pressure distribution profile at a time t. 25

Fig.6. (a) The gas parameters in the regions associated with shock wave. (b) The partice flow velocities before and the reflection of a shock wave. 27

Fig.7. Typical oscillograms of pressure profile in C₂H₄O-O₂-Ar mixture behind initial shocks : (a) u₁=1655.3 m/s, (b) u₁=754.6 m/s and (c) u₁=735.2 m/s. In each oscillogram, the upper and lower signals represent pressure profiles observed at station 2 and station 1, respectively. The sweep speed is 0.1 ms per division. 41

Fig.8. Plot of log r versue 1/T5 for the mixtures A(○) and E(●). 46

Fig.9. Plot of log r versue 1/T5 for the mixtures B(□) and D(■). 47

Fig.10. Plot of log r versue 1/T5 for the mixtures C(△), F(☆) and G(▲). 48

Fig.11. Plot of y versue 1/T5 for all the mixtures : y=log{τ/(10-9.24[C₂H₄O]-0.43 [O₂]-0.49 [Ar]0.52)}. 50

Fig.12. Typical oscillograms of pressure profile(the upper signal) and OH emission profile(A³△→X²Ⅱ, 306.4 nm)(the lower signal). The pressure and emission profiles were observed at station 2 and window 1 located at 75 mm distance from station 1), repectively. The sweep speed is 0.1 ms/division. 54

Fig.13. Typical oscillograms of;(a) detonation pressure and (b) OH emission profile A³△→X²Ⅱ, 306.4 nm)(the lower signal). The pressure and emission profiles were observed at station 2 and window 2 located at the end plate of the shock tube, repectively. The sweep speed is 0.1 ma/division. 55

Fig.14. Time-profile of OH concentration for the mixture C (φ=1.00) behind the reflected shock calculated by using the full scheme except the reaction 135. 62

Fig.15. Time-profile of OH concentration for the mixture C (φ=1.00) behind the reflected shock calculated by using the full scheme. 64

Fig.16. Delay times of the mixture C (φ=1.00) : symbols show the experimental values and the line represents the calculated values. 65

Fig.17. Delay times of the mixture D (φ=1.67) : symbols show the experimental values and the line represents the calculated values. 66

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