Numerical Investigation on Detonation Initiation and Propagation with a Symmetric-Jet in Supersonic Combustible Gas
نویسندگان
چکیده
In this study, supersonic gaseous detonation initiation and propagation by single- symmetric-jets are compared, the effects of different intensities on further investigated to obtain a more comprehensive understanding mechanism hot jet in mixtures. The two-dimensional reactive Navier–Stokes equations, together with one-step Arrhenius chemistry model, adopted analyze flow field structure. results show that bow shocks induced interacting each other will achieve local combustion. Influenced unstable shear layer behind triple point, large-scale vortex shedding is formed field, thus promoting consumption unburned region. By comparing single-jet, it found dual-jet method can shorten distance complete initiation, but has little effect overdrive degree. addition, study impact size parameters symmetric-jet revealed there critical value, above which ignition decreases rapidly significant advantage over single-jet. However, below threshold, rely energy generated collision Mach stems at walls, resulting slower rate compared Therefore, use appropriate strength when using result desirable velocity shorter detonation.
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ژورنال
عنوان ژورنال: Aerospace
سال: 2022
ISSN: ['2226-4310']
DOI: https://doi.org/10.3390/aerospace9090501