Numerical simulation of the deflagration to detonation transition

Parra-Santos, Teresa; Ruíz, Francisco; Méndez-Bueno, C.

doi:10.1007/s10573-005-0025-z

Cited by 8 publications

(1 citation statement)

References 22 publications

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“…Parra-Santos et al [25] did numerical simulation of DDT using the 1D Euler equation. The run-up distance of DDT is calculated and qualitative agreement with experimental data is obtained.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Deflagration to Detonation Transition in a Straight Duct: Effects of Energy Release and Detonation Stability

Dou

Khoo

et al. 2014

Adv. Appl. Math. Mech.

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Abstract. Numerical simulation based on the Euler equation and one-step reaction model is carried out to investigate the process of deflagration to detonation transition (DDT) occurring in a straight duct. The numerical method used includes a high resolution fifth-order weighted essentially non-oscillatory (WENO) scheme for spatial discretization, coupled with a third order total variation diminishing Runge-Kutta time stepping method. In particular, effect of energy release on the DDT process is studied. The model parameters used are the heat release at q = 50,30,25,20,15,10 and 5, the specific heat ratio at 1.2, and the activation temperature at Ti = 15, respectively. For all the cases, the initial energy in the spark is about the same compared to the detonation energy at the Chapman-Jouguet (CJ) state. It is found from the simulation that the DDT occurrence strongly depends on the magnitude of the energy release. The run-up distance of DDT occurrence decreases with the increase of the energy release for q = 50 ∼ 20, and increases with the increase of the energy release for q = 20 ∼ 5. This phenomenon is found to be in agreement with the analysis of mathematical stability theory. It is suggested that the factors to strengthen the DDT would make the detonation more stable, and vice versa. Finally, it is concluded from the simulations that the interaction of the shock wave and the flame front is the main reason for leading to DDT. PACS: 47.40.Rs, 47.70.Fw

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“…Parra-Santos et al [25] did numerical simulation of DDT using the 1D Euler equation. The run-up distance of DDT is calculated and qualitative agreement with experimental data is obtained.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Deflagration to Detonation Transition in a Straight Duct: Effects of Energy Release and Detonation Stability

Dou

Khoo

et al. 2014

Adv. Appl. Math. Mech.

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Numerical study on the effect of carbon particles on flow field characteristics of rotating detonation engine

Wang,

Chen,

et al. 2023

Aerospace Science and Technology

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Effect of the inlet spatial fluctuation on the gas–solid continuous rotating detonation flow field characteristics

Wang,

Zhang,

Liu

et al. 2024

Physics of Fluids

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Continuous rotating detonation engines have been extensively studied due to their high thermal efficiency. The utilization of solid particles as fuel can effectively reduce costs and enhance detonation performance. We have constructed a compressible gas–solid multimedium flow combustion numerical method, employing the double flux model coupled with fifth-order weighted essentially non-oscillatory and third-order total variation diminishing Runge–Kutta schemes to solve the unsteady multi-component chemical reaction Eulerian–Eulerian equations. Finite-rate methods and surface reaction models are used to simulate the combustion of gaseous mixtures and carbon particles. The effects of the inlet total pressure spatial fluctuations and particle diameter on the flow field characteristics of the continuous rotating detonation engine are investigated. The results indicate that changing the fluctuation period significantly affects the number, propagation direction, and intensity of gas–solid two-phase continuous rotating detonation waves (CRDW). The variation of fluctuation amplitude noticeably alters the combustion characteristics of the two-phase continuous rotating detonation wave, and excessively high amplitudes cannot form continuous rotating detonation waves. Introducing solid particles into fuel significantly mitigates the impact of inlet total pressure spatial fluctuation and promotes propagation stability on the detonation waves. Moreover, when solid particle diameters reach or exceed the micrometer scale, they contribute more favorably to generating a stable detonation flow field. However, excessive particle sizes result in a low surface reaction rate and inadequate contribution of heat released from particle combustion to the propagation of detonation waves.

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Numerical simulation of the deflagration to detonation transition

Cited by 8 publications

References 22 publications

Numerical Simulation of Deflagration to Detonation Transition in a Straight Duct: Effects of Energy Release and Detonation Stability

Numerical Simulation of Deflagration to Detonation Transition in a Straight Duct: Effects of Energy Release and Detonation Stability

Numerical study on the effect of carbon particles on flow field characteristics of rotating detonation engine

Effect of the inlet spatial fluctuation on the gas–solid continuous rotating detonation flow field characteristics

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