scholarly journals Управление детонационным горением посредством предварительной подготовки газовой смеси

2020 ◽  
Vol 46 (4) ◽  
pp. 40
Author(s):  
В.А. Левин ◽  
Т.А. Журавская
Keyword(s):  
Detonation Wave ◽  
Chemical Interaction ◽  
Atomic Gases ◽  
Detonation Cell ◽  
Detonation Combustion ◽  
Mixture Decomposition ◽  
Detonation Cell Size ◽  
Preliminary Preparation ◽  
Detailed Kinetic Model ◽  
Partial Dissociation

Using a detailed kinetic model of chemical interaction, numerical investigation of influence of a preliminary preparation of a stoichiometrical hydrogen-air mixture (decomposition of some volumes of molecular hydrogen and molecular oxygen gases into atomic gases) on characteristics of a propagating detonation wave has been carried out. It has been obtained that the preliminary partial dissociation of the gas mixture results in an essential decrease of the detonation cell size and a small increase of the self-sustained detonation wave propagation velocity. Due to the established detonation combustion features, preliminary preparation of the mixture can be used to prevent destruction of a detonation wave in channels with both a single transverse barrier and a barrier domain.

scholarly journals Influence of Detonation Cell Size on Propagation of Cylindrical Detonation Wave

2014 ◽  
Vol 12 (ists29) ◽  
pp. Pa_1-Pa_7
Author(s):  
Masashi WAKITA ◽  
Kazuya SAJIKI ◽  
Tsunetaro HIMONO ◽  
Tsuyoshi TOTANI ◽  
Harunori NAGATA
Keyword(s):  
Detonation Wave ◽  
Cell Size ◽  
Detonation Cell ◽  
Detonation Cell Size

Rapid Minimum Tube Diameter Measurement and Comparison with Detonation Cell Size

2020 ◽  
Author(s):  
Andrew M. Knisely ◽  
Andrew Naples ◽  
Kyle B. Brady ◽  
John Hoke ◽  
Stephen A. Schumaker
Keyword(s):  
Cell Size ◽  
Tube Diameter ◽  
Diameter Measurement ◽  
Detonation Cell ◽  
Detonation Cell Size

Numerical Study on NOx Reduction in Pulse Detonation Combustion by Using Steam Injection Decoupled From Detonation Development

2018 ◽  
Author(s):  
Niclas Hanraths ◽  
Fabian Tolkmitt ◽  
Phillip Berndt ◽  
Neda Djordjevic
Keyword(s):  
Initial Conditions ◽  
Numerical Study ◽  
Nox Reduction ◽  
Pollutant Emissions ◽  
Nox Emissions ◽  
Reliable Operation ◽  
Detonation Cell ◽  
Pulse Detonation ◽  
Detonation Combustion ◽  
Reduction Methods

Recently, the focus has been laid on the characteristics of pollutant emissions from pulse detonation combustion. Initial studies indicate possibly high nitrogen oxides (NOx) emissions, so the assessment of potential primary reduction methods is advisable. The present work considers the following reduction methods: lean combustion, nitrogen and steam dilution as well as flue gas recirculation. Since such changes in the combustion mixture reduce its reactivity and thus detonability, they can impair a reliable operation in technical systems. In order to explore the potential and limitations of each of these reduction methods, they are compared for mixtures featuring an identical characteristic detonation cell size at given initial conditions. Furthermore, building upon the use of steam dilution, a modified method to add steam to the combustible mixture is investigated. In order to avoid the strong reduction of mixture detonability by steam addition and ensure a robust detonation formation, steam is injected into the already developed detonation front. It was found that, for sufficiently even steam distribution, NOx reduction comparable to a premixed dilution could be achieved. This approach enables the realization of NOx reduction in pulse detonation combustion also for such conditions, for which premix dilution is not feasible. Therefore, combining the premix dilution with post-shock injection offers a promising strategy to substantially reduce NOx emissions from pulse detonation combustion, while at the same time ensuring its reliable operation.

scholarly journals Effect of non-equilibrium plasma on decreasing the detonation cell size

2020 ◽  
Vol 217 ◽  
pp. 1-3 ◽  
Author(s):  
Mhedine Ali Cherif ◽  
Sergey A. Shcherbanev ◽  
Svetlana M. Starikovskaia ◽  
Pierre Vidal
Keyword(s):  
Cell Size ◽  
Detonation Cell ◽  
Equilibrium Plasma ◽  
Detonation Cell Size ◽  
Non Equilibrium
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