Numerical simulation of triple shock behavior of gaseous detonation

Taki, Shiro; Fujiwara, Toshi

doi:10.1016/s0082-0784(81)80171-3

Cited by 59 publications

(23 citation statements)

References 7 publications

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“…Thus, the experimental comparison has no great significance, but the effects of other flow and thermochemical parameters are typically investigated in this sort of study. The validity of the present modeling procedure was thoroughly studied in [21], and most of the previous detonation studies used these types of simplified models [11,13,15,17]. Recent studies [3-6, 8, 22, 31, 32] have used this approach for the investigation of combustion characteristics in RDEs, which gave good comparisons with experimental observations and physical insights into RDEs.…”

Section: Grid Resolution Studymentioning

confidence: 99%

“…This is evident from the formation of collaborative teams and groups by universities and industries worldwide. Much of the early research was carried out to examine the gaseous detonative wavelet structure [10][11][12][13][14][15][16][17][18][19] and its typical cellular patterns [20]. Recently, Choi et al [21] proposed a common standard of grid resolution prerequisites for achieving an explicit simulation of detonation cell structure in a 2-D rectangular channel.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Quasi-steady State Simulation of Rotating Detonation Engine

Niyasdeen¹,

Oh²,

Kim³

et al. 2015

International Journal of Aeronautical and Space Sciences

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We performed a numerical simulation based on the two-dimensional (2-D) unsteady Euler's equation with a single-step Arrhenius reaction model in order to investigate the detonation wave front propagation of an Argon (Ar) diluted oxy-hydrogen mixture (2H2 + O2 + 12Ar). This simulation operates in the detonation frame of reference. We examine the effect of grid size and the performance impact of integrated quantities such as mass flow. For a given set of baseline conditions, the minimal and maximum grid resolutions required to simulate the respective detonation waves and the detonation cell structures are determined. Tertiary shock wave behavior for various grids and pre-exponential factors are analyzed. We found that particle fluctuation can be weakened by controlling the mass flow going through the oblique shock waves.

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Section: Grid Resolution Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Quasi-steady State Simulation of Rotating Detonation Engine

Niyasdeen¹,

Oh²,

Kim³

et al. 2015

International Journal of Aeronautical and Space Sciences

View full text Add to dashboard Cite

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“…The rates of a (progress parameter for induction reaction) and β (progress parameter for exothermic reaction), ω α and ω β , are given as below [16]:…”

Section: Common Chemical Reaction Modelsmentioning

confidence: 99%

New numerical algorithms in SUPER CE/SE and their applications in explosion mechanics

Wang

Liu

2010

Sci. China Phys. Mech. Astron.

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The new numerical algorithms in SUPER/CESE and their applications in explosion mechanics are studied. The researched algorithms and models include an improved CE/SE (space-time Conservation Element and Solution Element) method, a local hybrid particle level set method, three chemical reaction models and a two-fluid model. Problems of shock wave reflection over wedges, explosive welding, cellular structure of gaseous detonations and two-phase detonations in the gas-droplet system are simulated by using the above-mentioned algorithms and models. The numerical results reveal that the adopted algorithms have many advantages such as high numerical accuracy, wide application field and good compatibility. The numerical algorithms presented in this paper may be applied to the numerical research of explosion mechanics. new algorithm, SUPER CE/SE, numerical simulation, explosion mechanicsThe research of explosion mechanics, usually involving many disciplines such as compressible flows, incompressible flows, elastic-plastic flows, chemically reacting flows and two-phase flows, contributes significantly to the field of industry, aeronautics, and military engineering. Numerical simulation of explosion mechanics needs not only accurate numerical schemes and interface capturing methods, but also a perfect combination of the selected numerical algorithms and the physical and chemical models.The imported commercial software, such as LS-DYNA and AUTODYN, currently plays a dominant role in the application of explosion mechanics in China. Further development based on the imported commercial software is quite difficult, because the kernel modules of the software are always held as commercial secrets. The software of computational explosion mechanics in China has undergone a step-by-step development. The well-established software packages include METH This paper has studied the new numerical algorithms in SUPER CE/SE and their applications in explosion mechanics. SUPER CE/SE uses an improved CE/SE (space-time Conservation Element and Solution Element) method [5,6] to discrete governing equations, a local hybrid particle level set method to capture the interface, and a two-fluid model to treat two-phase flows. SUPER CE/SE is also able to adopt common chemical reaction models, such as two-step, detailed and Sichel's two-step chemical reaction models. With the above algorithms and models, problems of shock wave reflection over wedges, explosive welding, cellular structure of gaseous detonations and two-phase detonations in gas-droplet system are investigated. Comparisons and dis-

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“…Calculations by Taki and Fujiwara (1981) describe a system with a number of exothermic spots, located across the path of the detonation, that perturb the planar detonation wavefront. Again, the system evolves into a group of triple points.…”

Section: The Development Of Cellular Structurementioning

confidence: 99%

“…There have been two main approaches. The first is to set up a propagating planar detonation with some kind of a perturbation either behind or in front of it (e.g., Taki and Fujiwara, 1981;Kailasanath et al, 1985a,b). The second approach is to set off a shock or explosion in a homogeneous detonable mixture, and watch the evolution to a detonation (Oran et al, 1982).…”

Section: The Development Of Cellular Structurementioning

confidence: 99%