scholarly journals Detonation Wave Solutions and Linear Stability in a Four Component Gas with Bimolecular Chemical Reaction

2015 ◽  
pp. 61-82
Author(s):  
F. Carvalho ◽  
A. W. Silva ◽  
A. J. Soares
Keyword(s):  
Detonation Wave ◽  
Linear Stability ◽  
Chemical Reaction ◽  
Wave Solutions ◽  
Bimolecular Chemical Reaction

scholarly journals The Influence of Pipe Bending Curvature on H2-O2 Gaseous Detonation Wave Front

2021 ◽  
Vol 11 (9) ◽  
pp. 3951
Author(s):  
Hui Zhao ◽  
Huiyuan Li ◽  
Haitao Zhao ◽  
Leisheng Li ◽  
Jian Li
Keyword(s):  
Detonation Wave ◽  
Pressure Distribution ◽  
Wave Front ◽  
Cell Size ◽  
Chemical Reaction ◽  
Cellular Structure ◽  
Gaseous Detonation ◽  
External Boundary ◽  
Propagation Characteristics ◽  
Detonation Wave Front

The influence of different bend curvatures on the detonation wave propagation was analyzed by an advanced numerical simulation system. The mechanism of propagation properties is revealed by cellular structure, internal and external boundary pressure distribution, propagation process of detonation wave and chemical reaction. The cellular structure and detonation wave front of bend with different curvature are very different. The simulation results show that the detonation wave with regular cell structure propagating through the curved parts induces detonation cell size increased by diffraction near the inner wall while detonation reflected on the bottom surface resulting in decrease of cell size. Detonation wave was affected by the rarefaction wave and compression wave in the bent pipe. The pressure distribution of the bend shows that the peak pressure in the 450 curvature is the largest, which should be paid more attention in industrial design. The chemical reaction could indicate the propagation characteristics of detonation wave, and different propagation characteristics have different profiles of chemical components.

The formation and development of oblique detonation wave with different chemical reaction models

2021 ◽  
pp. 106964
Author(s):  
Hongbo Guo ◽  
Xiongbin Jia ◽  
Ningbo Zhao ◽  
Shuying Li ◽  
Hongtao Zheng ◽  
...  
Keyword(s):  
Detonation Wave ◽  
Chemical Reaction ◽  
Oblique Detonation Wave ◽  
Reaction Models

scholarly journals Linear Stability of a Steady Convective Flow between Permeable Cylinders

Fluids ◽  
2021 ◽  
Vol 6 (10) ◽  
pp. 342
Author(s):  
Maksims Zigunovs ◽  
Andrei Kolyshkin ◽  
Ilmars Iltins
Keyword(s):  
Reynolds Number ◽  
Stability Analysis ◽  
Linear Stability ◽  
Chemical Reaction ◽  
Linear Stability Analysis ◽  
Convective Flow ◽  
Base Flow ◽  
Marginal Stability ◽  
Heat Sources ◽  
Rate Of Increase

Linear stability analysis of a steady convective flow in a tall vertical annulus caused by nonlinear heat sources is conducted in the paper. Heat sources are generated as a result of a chemical reaction. The effect of radial cross-flow through permeable porous walls of the annulus is analyzed. The problem is relevant to biomass thermal conversion. The base flow solution is obtained by solving nonlinear boundary value problem. Linear stability analysis is performed, using collocation method. The calculations show that radial inward or outward flow has a stabilizing effect on the flow, while the increase in the Frank–Kamenetskii parameter (proportional to the intensity of the chemical reaction) destabilizes the flow. The increase in the Reynolds number based on the radial velocity leads to the appearance of the second minimum on the marginal stability curves. The rate of increase in the critical Grashof number with respect to the Reynolds number is different for inward and outward radial flows.

Force-activated reactivity switch in a bimolecular chemical reaction

2009 ◽  
Vol 1 (3) ◽  
pp. 236-242 ◽  
Author(s):  
Sergi Garcia-Manyes ◽  
Jian Liang ◽  
Robert Szoszkiewicz ◽  
Tzu-Ling Kuo ◽  
Julio M. Fernández
Keyword(s):  
Chemical Reaction ◽  
Bimolecular Chemical Reaction

scholarly journals A Zel’dovich–von Neumann–Döring-like detonation wave in a multi-temperature mixture

2019 ◽  
Vol 869 ◽  
pp. 674-705 ◽  
Author(s):  
Damir Madjarević ◽  
Srboljub Simić ◽  
Ana Jacinta Soares
Keyword(s):  
Detonation Wave ◽  
Chemical Reaction ◽  
Wave Structure ◽  
Jump Discontinuity ◽  
Theory Approach ◽  
Reaction Heat ◽  
Von Neumann ◽  
Detonation Structure ◽  
Reversible Chemical Reaction ◽  
Non Equilibrium

The detonation wave structure is analysed in a binary mixture undergoing a reversible chemical reaction represented by $A_{r}\rightleftharpoons A_{p}$. It is assumed that the flow satisfies the proper basic assumptions of the Zel’dovich–von Neumann–Döring (ZND) detonation model, namely the flow is one-dimensional and the shock is represented by a jump discontinuity, but the assumption of local thermodynamic equilibrium is disregarded. This allows us to deeply investigate the coupling between the detonation structure of overdriven detonations and its chemical kinetics. The thermodynamic non-equilibrium effects are taken into account in the mathematical description, using the model of a multi-temperature mixture developed within extended thermodynamics, which has been proved to be consistent with a kinetic theory approach. The reaction rate is then enriched with terms that take into account the temperatures of the constituents. The results show that the temperature difference between components within the detonation wave structure, which describes thermodynamic non-equilibrium, is driven by the chemical reaction. Numerical computations confirm the existence of non-monotonic profiles in the reaction zone of overdriven detonations which are sensitive to changes in the activation energy and reaction heat.

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