爆震波的產生對於脈衝爆震波引擎為非常關鍵的一環，尤其是在具有預爆震室的設計裡，如何讓爆震波成功地傳遞在不同反應物於突張的結構下顯得更加重要。在本研究中採用丙烷/氧氣與丙烷/空氣做為兩種不同反應物，並研究在有無突張結構的圓管中對於爆震波傳遞的影響。在預爆震室中，主要產生兩種形態的爆震波做為入射波，分別為自維持爆震波以及過驅爆震波。其中，過驅爆震波的產生方式為改變預爆震室內的初始壓力差，使壓力較低的反應物產生過驅爆震波。在沒有突張的圓管中，爆震波的點燃隨著壓力的增加而產生；當入射爆震波為過驅時，爆震波的點燃機制非常接近於震波放大同步爆炸反應，而點燃條件與初始壓力較無相關。此外，二維效應也在過驅爆震波的過驅度與初始壓力比關係中討論。在有突張結構的圓管下，以預爆震室的入射波之活塞功來表示其強度。當入射波為CJ爆震波時，爆震波的再點燃之產生主要根據預爆震室的初始壓力以及擴張比的變化。此外，利用數值模擬來分析在沒有反應的冷流場中，通過突張面的繞射震波於壁面反射的情形。爆震波的傳遞主要可以分為傳遞震波、爆震波再點燃以及直接點燃，這些模式根據活塞功的大小產生。對稱與非對稱碳跡圖顯示了直接點燃與再點燃之差異。儘管如此，在爆震波傳遞模式中亦發現一延遲區，在此延遲區中，只有快速燃震波被產生。此現象被認為是震波於壁面反射與化學反應相互影響造成。

Detonation initiation is a crucial step in a pulse detonation system. Further, in the concept of pre-detonator, detonation transmission between two mixtures through an abrupt area change is a critical aspect. In this study, detonation transmission between propane/oxygen and propane/air with and without an abrupt area change was investigated. In the donor, there are two types of incident detonation waves: a self-sustained Chapman–Jouguet (CJ) detonation wave and an overdriven detonation wave generated by the difference in initial donor pressure ratios. In a straight tube with an incident CJ detonation wave, a high initial pressure level is required in the donor for successful detonation transmission. When the incident wave is an overdriven detonation wave, shock wave amplification appears to be the dominant mechanism of detonation re-initiation. The bi-dimensional effect was also examined. In an expansion tube, the piston work is used to characterize the strength of the incident detonation wave. For an incident CJ detonation wave, the re-initiation of a detonation wave in the acceptor depends on the initial pressure in the donor and the expansion ratio. Additionally, a numerical simulation was performed under cold flow conditions for understanding the effect of wall confinement on the reflection of the diffracted shock wave. The regimes of detonation transmission across a mixture include a transmitted shock wave, detonation re-initiation, and smooth detonation transmission, all of which depend on the amplitude of piston work. Axisymmetric and non-axisymmetric soot patterns correspond to direct detonation and detonation re-initiation, respectively. Nevertheless, a delay regime was also observed, and it was thought to result from the effect of wall confinement on the reflected shock wave structure.

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