Numerical study on three-dimensional C-J detonation waves: detailed propagating mechanism and existence of OH radical

Eto, Keitaro; Tsuboi, Nobuyuki; Hayashi, A. Koichi

doi:10.1016/j.proci.2004.08.169

Cited by 48 publications

(15 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[36][37][38][39] The cells computed using the 27-reaction mechanism do, however, take on a more regular structure with an average size of 3-4 mm, which agrees reasonably well with cells computed in other hydrogen-air simulations. [19][20][21][22] This computed value is well outside of the range of experimental values, and in this case indicates a problem with the detailed thermochemical model. A simple resolution study was performed to examine the effect of varying the grid resolution at the finest AMR levels (around shocks and reaction zones) on the cellular structures computed using the 27-reaction mechanism.…”

Section: Discussionmentioning

confidence: 58%

“…[19][20][21][22] Their research has included three-dimensional cellular structure with rectangular 19 and diagonal 20 modes, as well as spinning detonations in square channels 21 and round tubes. 22 Their efforts have been primarily directed at determining the detailed structure of near-limit detonations and thus have been restricted to very small domains which are on the order of the detonation cell width in their simulations, precluding the formation of multiple cellular structures.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Influence of Chemical Kinetics on the Structure of Hydrogen-Air Detonations

Taylor

Kessler

Gamezo

et al. 2012

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

View full text Add to dashboard Cite

Two-dimensional simulations of a detonation propagating through a 4 cm wide channel filled with a stoichiometric hydrogen-air mixture using two different models for the chemical kinetics are presented: a single-step model calibrated to compute deflagrationto-detonation transitions in hydrogen-air mixtures and a 9-species, 27-reaction mechanism specially constructed for high-pressure combustion. The detonations in both cases are qualitatively similar. Shock triple points that form along the leading edge of the front cause it to be highly corrugated and non-uniform. The trajectories of these triple points are recorded by storing the maximum pressure at each location in space. The cellular patterns formed on these numerical smoke foils are found to differ from those recorded in past experiments. The single-step model produces a hierarchy of cell structures in which the largest structures are comparable in size to experimental ones, but incomplete. Cells are incomplete at the largest scale and over an order of magnitude too small at the smallest scale. While the 27-reaction mechanism produces more regular cells, they are a factor of 3-4 smaller than those found in experiments. Agreement between the present simulation results and others found in the literature suggests that there may be a problem with using detailed thermochemical models for the extreme pressures and temperatures encountered when simulating an unstable detonation. Modifications to the single-step model parameters are presented that produce a one-dimensional detonation structure and constant volume ignition delay times that are similar to those computed using the detailed thermochemical mechanism. The two-dimensional cellular structure computed using this modified single-step reaction model is also similar to that of the 27-reaction mechanism.

show abstract

Section: Discussionmentioning

confidence: 58%

Section: Introductionmentioning

confidence: 99%

The Influence of Chemical Kinetics on the Structure of Hydrogen-Air Detonations

Taylor

Kessler

Gamezo

et al. 2012

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

View full text Add to dashboard Cite

show abstract

“…Gradually, more transverse wave surfaces and triple lines are generated in the overdriven detonation because of the essential instability, as shown from In the previous 3D detonation simulations in rectangular channels with simplified reaction models or detailed reaction models, the results show different models of detonation fronts: a rectangular mode, a diagonal mode and even a spinning mode [41,43,45,46,77] . However, for the simulation here, none of these detonation modes is observed.…”

Section: Detonation Propagationmentioning

confidence: 85%

Adaptive mesh refinement based simulations of three-dimensional detonation combustion in supersonic combustible mixtures with a detailed reaction model

Cai

Liang

Deiterding

et al. 2016

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

Although the overdrive degree of the 3D detonation is smaller than that of the 2D case, more complex and irregular detonation fronts can be observed in the 3D case compared with the 2D detonation, which is likely because of the propagation of transverse waves and collisions of triple lines in multi-directions in 3D detonations. After the hot jet is shut down, the newly formed 2D Chapman-Jouguet (CJ) detonation has almost the same characteristic parameters with the corresponding 3D case, indicating that the 2D instabilities can be perfectly preserved in 3D simulations. However, the slapping wave reflections on the side walls in the 3D detonation result in the second oscillation along with the main one, which presents stronger instabilities compared with the 2D case. The inherent stronger 3D instabilities is also verified through the quantitative comparison between the 2D and 3D cases where the 3D result always shows stronger fluctuations than the 2D case.

show abstract

“…The formation and propagation of detonations are complex processes. The studies of the formation and propagation of detonations are of important theoretical values and practical significance for safety engineering, such as the prevention of explosions in coal mines [1], or for the development of the next generation propulsion systems like the pulse detonation engine (PDE) and the oblique detonation wave engine (ODWE) [2]. Therefore, to understand the process of detonation in detail is still needed.…”

Section: Introductionmentioning

confidence: 99%

“…clear cellular structures using a parallelized, unsplit shock-capturing algorithm. Moreover, Keitaro Eto et al [2] studied numerically the diagonal detonations and the unburned pockets by a detailed chemical reaction model. In this paper, we investigate the characteristics of three-dimensional detonation in an argon-diluted mixture of hydrogen and oxygen using the three-dimensional Euler equations with a simple chemical reaction model as the governing equations.…”

Section: Introductionmentioning

confidence: 99%