The propagation of detonation waves in channels of varying cross-section

Bartlmä, Fritz

doi:10.1017/s0022112090000982

Cited by 7 publications

(1 citation statement)

References 10 publications

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“…10 As the detonation enters the crossover, the shock wave and combustion front begin to decouple. 11 Assuming the detonation from the last tube in succession crosses over to ignite a detonation in the first tube, then with the exception of the DDT, all detonations are initiated with tube-to-tube initiation in a continuous branching PDE. 9 Although a continuous branching PDE is not utilized in this research, the results regarding crossover location and width documented here should be applicable to the operation of a continuous branching PDE in the future.…”

Section: List Of Figuresmentioning

confidence: 99%

Determination of Effective Crossover Location and Dimensions for Branched Detonation in a Pulsed Detonation Engine

Camardo¹

2012

50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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A study is presented of the optimal crossover duct location and width to obtain consistent branched detonation transition from one detonation tube to another. On a Pulsed Detonation Engine (PDE) with detonation branching, the duct location at which the detonation crosses from one (primary) tube to a branched (secondary) tube impacts the number of successful detonations. In this paper, a comparison is made of the effects of the location and width of the crossover duct for hydrogen, ethylene and an n-alkane. The crossover location is varied from the aft end of the detonation tube to the middle of the detonation tube while the crossover width is varied from 2.5 in to 0.5 in. Detonation wave speeds are measured and compared to Chapman-Jouguet velocities in order to determine successful detonations. Regardless of crossover location, all three fuels are demonstrated 100% of the time to transition between 2 in detonation tubes with a crossover width of 2 in. With a mid-location crossover duct, all three fuels are demonstrated 100% of the time to transition detonations between 2 in detonation tubes with a crossover width between 1.75 in and 2.5 in. v I am thankful for the opportunity I have been given to attend the Air Force Institute of Technology and for the chance to learn from the finest individuals that the Air Force Research Laboratory has to offer. I am proud to have been associated with the Detonation Engine Research Facility, even if only for a short time. The individuals who work in D-Bay and 5-Stand are true professionals. I extend my thanks to them for allowing me to take part in the amazing work that they do on a regular basis.

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Section: List Of Figuresmentioning

confidence: 99%