Mach reflection bifurcations as a mechanism of cell multiplication in gaseous detonations

Mach, Philip; Radulescu, Matei I.

doi:10.1016/j.proci.2010.06.145

Cited by 59 publications

(30 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These values correspond to the typical conditions of shock reflections in cellular detonation waves [17] with a heat release of Q/RT 0 ≈ 50. A vast amount of literature now exists on the detonation shock reflection dynamics with these parameters (see Ref.…”

Section: Methodssupporting

confidence: 65%

See 1 more Smart Citation

Non-uniqueness of solutions in asymptotically self-similar shock reflections

Lau-Chapdelaine

Radulescu

2013

Shock Waves

View full text Add to dashboard Cite

The present study addresses the self-similar problem of unsteady shock reflection on an inclined wedge. The start-up conditions are studied by modifying the wedge corner and allowing for a finite radius of curvature. It is found that the type of shock reflection observed far from the corner, namely regular or Mach reflection, depends intimately on the start-up condition, as the flow "remembers" how it was started. Substantial differences were found. For example, the type of shock reflection for an incident shock Mach number M = 6.6 and an isentropic exponent γ = 1.2 changes from regular to Mach reflection between 44 • and 45 • when a straight wedge tip is used, while the transition for an initially curved wedge occurs between 57 • and 58 • .

show abstract

Section: Methodssupporting

confidence: 65%

“…A vast amount of literature now exists on the detonation shock reflection dynamics with these parameters (see Ref. [17] and references therein). The angle of the ramp θ w was varied in order to determine the transition point between regular reflection and Mach reflection.…”

Section: Methodsmentioning

confidence: 99%

Non-uniqueness of solutions in asymptotically self-similar shock reflections

Lau-Chapdelaine

Radulescu

2013

Shock Waves

View full text Add to dashboard Cite

show abstract

“…Numerical simulations [45] and experimental observations [46][47][48] indicate the existence of two types of detonation structures, which are usually classified as regular (weakly unstable) and irregular (unstable) detonations based on the regularity of the cellular structure [49][50][51][52][53][54][55]. Self-sustaining CJ detonations in low-pressure hydrogenoxygen mixtures with a high-argon dilution are ideal candidates for detonation simulations in supersonic combustible mixtures as regular detonation cell patterns can be generated [56].…”

Section: Mathematical Modelmentioning

confidence: 99%

Detonation Simulations in Supersonic Combustible Mixtures with Nonuniform Species

et al. 2016

View full text Add to dashboard Cite

“…Numerical simulations [48] and experimental observations [49][50][51] show that there are generally two types of detonation structures. According to the cellular structure regularity, they are usually classified as regular (weakly unstable) and irregular (unstable) structure [52][53][54][55][56][57][58][59] .…”

Section: Calculation Modelmentioning

confidence: 99%

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

Mach reflection bifurcations as a mechanism of cell multiplication in gaseous detonations

Cited by 59 publications

References 20 publications

Non-uniqueness of solutions in asymptotically self-similar shock reflections

Non-uniqueness of solutions in asymptotically self-similar shock reflections

Detonation Simulations in Supersonic Combustible Mixtures with Nonuniform Species

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

Contact Info

Product

Resources

About