Experimental and Numerical Study on Disc-RDE: Relation between Number of Detonation Wave and Pressure

2022 ◽  
Author(s):  
A Koichi Hayashi
Keyword(s):  
Detonation Wave ◽  
Numerical Study

scholarly journals Numerical study of detonation wave propagation modes in annular channels

AIP Advances ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 085203
Author(s):  
Duo Zhang ◽  
Xueqiang Yuan ◽  
Shijie Liu ◽  
Xiaodong Cai ◽  
Haoyang Peng ◽  
...  
Keyword(s):  
Wave Propagation ◽  
Detonation Wave ◽  
Numerical Study ◽  
Annular Channels ◽  
Detonation Wave Propagation

Numerical Study of the Detonation Wave Structure in a Linear Model Detonation Engine

2018 ◽  
Author(s):  
Supraj Prakash ◽  
Romain Fiévet ◽  
Venkatramanan Raman ◽  
Jason R. Burr ◽  
Kenneth H. Yu
Keyword(s):  
Detonation Wave ◽  
Linear Model ◽  
Numerical Study ◽  
Wave Structure ◽  
Detonation Engine

Numerical Study of Detonation Propagation in an Insensitive High Explosive Arc with Confinement Materials

2020 ◽  
pp. 2050117
Author(s):  
Yupei Qin ◽  
Kuibang Huang ◽  
Huan Zheng ◽  
Yousheng Zhang ◽  
Xin Yu
Keyword(s):  
Stainless Steel ◽  
Steady State ◽  
Detonation Wave ◽  
High Explosive ◽  
Numerical Study ◽  
Detonation Front ◽  
Outer Boundary ◽  
Outer Part ◽  
Transition Phase ◽  
Detonation Propagation

Detonation propagation in a confined circular arc configuration of an insensitive high explosive PBX9502 is investigated via numerical simulation in this paper. We introduce a steady detonation wave entering the explosive arc with confinements of stainless steel, and then it undergoes a transition phase and reaches a new steady state with a constant angular speed eventually. The influences of the inner and the outer confinements on the propagating detonation wave as well as the characteristics of the detonation driving zone (DDZ) in the steady state are discussed, respectively. Ignition and Growth (I&G) reaction rate and Jones–Wilkins–Lee (JWL) equations of state for the reactants and the products of PBX9502 are employed in the numerical simulations on the basis of a two-dimensional Eulerian code. The equation of state for stainless steel is in the Grüneisen form with a linear shock speed–particle speed Hugoniot relationship. Our results show that the inner confinement dominates the evolution of the detonation wave and the outer confinement only takes effect in a local region near the outer boundary within a limited initial stage during the transition phase. As for the steady state, the existence of the inner confinement makes the DDZ possess a certain width on the inner boundary. While as to the outer part of the detonation wave, the width of the DDZ decreases until the sonic locus intersects with the detonation front shock, which results in the detachment of the DDZ from the outer boundary and makes the detonation propagation fully independent of the outer confinement.

scholarly journals Numerical study of oblique detonation wave initiation in a stoichiometric hydrogen-air mixture

2015 ◽  
Vol 27 (9) ◽  
pp. 096101 ◽  
Author(s):  
Tao Wang ◽  
Yining Zhang ◽  
Honghui Teng ◽  
Zonglin Jiang ◽  
Hoi Dick Ng
Keyword(s):  
Detonation Wave ◽  
Numerical Study ◽  
Oblique Detonation Wave

scholarly journals Numerical simulation of detonation wave propagation using a two-stage kinetics model of chemical reactions in the shock-attached frame

2019 ◽  
pp. 293-308
Author(s):  
Я.Э. Порошина ◽  
П.С. Уткин
Keyword(s):  
Wave Propagation ◽  
Detonation Wave ◽  
Chemical Reactions ◽  
Numerical Algorithm ◽  
Numerical Study ◽  
Approximation Order ◽  
Kinetics Model ◽  
Computational Domain ◽  
Two Stage ◽  
Detonation Wave Propagation

Для численного исследования пульсирующей детонационной волны в рамках двухстадийной модели кинетики химических реакций в системе координат, связанной с фронтом лидирующей волны, разработан оригинальный вычислительный алгоритм. Для четырех известных режимов распространения детонации в рамках данной модели исследовано влияние порядка аппроксимации алгоритма, длины расчетной области, сеточного разрешения и типа граничного условия на дальней границе на результаты моделирования. Проведено сравнение характера пульсаций с результатами расчетов других авторов. For the numerical study of a pulsating detonation wave using a two-stage kinetics model of chemical reactions in the shock-attached frame, a new numerical algorithm is proposed. For the four known modes of detonation wave propagation, the effect of the approximation order of the proposed numerical algorithm, the length of the computational domain, the grid resolution, and the type of the farfield boundary condition on the simulation results is analyzed in the framework of this model. The character of pulsations is compared with the numerical results obtained by a number of other authors.

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