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Advances in Aircraft and Spacecraft Science   Volume 5, Number 5, September 2018, pages 533-550
DOI: https://doi.org/10.12989/aas.2018.5.5.533
 
Detonation transmission with an abrupt change in area
Yao-Chung Hsu, Yei-Chin Chao and Kung-Ming Chung

 
Abstract     [Full Text]
    Detonation transmission between propane/oxygen (donor) and propane/air (acceptor) with an abrupt area change is experimentally studied. In the donor, there are two types of incident detonation waves: A self-sustained Chapman-Jouguet (CJ) detonation wave and an overdriven detonation wave that is a result of the difference in the initial donor pressure ratios. 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. The axisymmetric and non-axisymmetric soot patterns respectively correspond to direct detonation and detonation re-initiation. For an incident overdriven detonation wave, the re-initiation of a detonation wave in the acceptor strongly depends on the degree of overdrive.
 
Key Words
    detonation; overdriven detonation; expansion ratio; piston work
 
Address
Yao-Chung Hsu, Yei-Chin Chao: Department of Aeronautics and Astronautics, National Cheng Kung University, 1 University Road, East district, Tainan 701, Taiwan
Kung-Ming Chung: Aerospace Science and Technology Research Center, National Cheng Kung University, 2500 Section 1, Chung-Cheng South Road, Guiren district, Tainan 711, Taiwan
 

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