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Ⅰ. 서론 7

Ⅱ. 이론 12

2.1 충격파와 폭굉 12

2.2 충격파와 폭굉파의 역학 16

2.3 충격관에서의 충격파 특성 25

가. 입사충격파 27

나. 반사충격파 31

다. 파라메터 계산 35

2.4 화학 반응및 컴퓨터 모델링 37

Ⅲ. 실험 42

3.1 실험장치 측정 42

3.2 시료 제조 44

3.3 화학 반응 모델링 45

3.3.1 방법론 45

3.3.2 CHEMKIN의 구조 47

Ⅳ. 결과및 고찰 48

4.1 아세트알데히드-산소-알곤 흔합물의 점화지연시간 48

4.2 아세트알데히드의 산화반응에 대한 속도론적 연구 63

Ⅴ. 결론 71

참고문헌 73

Abstract 75

Table 1. Experimental condition for CH₃CHO-O₂-Ar mixtures behind reflected shock (P=100 torr) 45

Table 2. Observed parameters in CH₃CHO-O₂-Ar mixtures behind reflected shock (P=100 torr) 51

Table 3. Comparison of delay kinetics acethylene with some compounds of interest 62

Table 4. Reaction scheme and rate coefficient expressions for CH₃CHO-O₂-Ar mixtures behind a reflected shock rate coefficients are expressed in the form k=ATn exp(-Ea/RT) where units are mol ㎝-1, sec and mol-1 65

Fig 1. The initiating of detonation. Highly luminous areas are shaded 13

Fig 2. One-dimensional flow for gas 17

Fig 3. P, 1/ρ Diagram for each comfression conditions in nonreactive gas 19

Fig 4. Hugoniot curve illustrating the hypothetical Chapma n-Jouguet detonation state J 19

Fig 5. Hugoniots illustrating variation in the state of a gas on passing through a detonation wave-front to reach the C-J state 23

Fig 6. (a) The gas parameters in the regions associated with shock wave (b) The partice flow velocities befere and the reflection of a shoc wave 26

Fig 7. (a) An x, t diagram showing progress of the shork wave. possible wave systems produced by the collision of a reflected shock wave and a contact surface, rare-fraction wave (b) The pressure distribution profile at a time t 28

Fig 8. Schematic diagram of shock tube 43

Fig 9. Structure of CHEMKIN 47

Fig 10. (a), (b). Typical oscillogram of pressure and OH emission profiles (Α²Σ → Χ²Ⅱ, 306.4 ㎚) in CH₃CHO-O₂-Ar mixture behind reflected shocks (sweep speed : 0.2 ㎳/div.) : A;triggered point, B;an arrival of a reflected shock and C;onset of detonation 50

Fig 10. (c), (d). Typical oscillogram of pressure and OH emission profiles (Α²Σ → Χ²Ⅱ, 306.4 ㎚) in CH₃CHO-O₂-Ar mixture behind reflected shocks (sweep speed : 0.2 ㎳/div.) : A;triggered point, B;an arrival of a reflected shock and C;onset of detonation 49

Fig 11. Plot of In τ versue 1/T5 for the mixture(CH₃CHO-O₂-Ar) A(■), B(○), F(◇) 58

Fig 12. Plot of In τ versue 1/T5 for the mixture(CH₃CHO-O₂-Ar) C(●), E(▲) 59

Fig 13. Plot of In τ versue 1/T5 for the mixtures(CH₃CHO-O₂-Ar) D(▲), G(□) 60

Fig 14. Plot of y versue 1/T5 for all the mixtures(CH₃CHO-O₂-Ar) y = ln{τ/(7.30×10-33[CH₃CHO]0.01[O₂]-1.65[Ar]-11.2)} 61

Fig 15. Reaction scheme of acetaldehyde oxidation 69

Fig 16. Sensitivity spectra of ignition delay time in mixture C at T5=1637 K. The open and solid bars represent the results of multiplying the indicated rate constants by 1/5 and 5, respectively. The numbers indicate the reaction number in Table 4 70

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