Numerical simulation of the structure of two-dimensional gaseous detonation of an H2-O2-Ar mixture

Trotsyuk, A. V.

doi:10.1007/bf02674500

Cited by 35 publications

(16 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A very regular cellular DW structure in hydrogen-oxygen-argon mixtures was studied in our previous 2D numerical simulation [1]. A good agreement was obtained between the numerical results and experimental data on the size a 0 over a wide range of initial pressures and degrees of mixture dilution by argon.…”

Section: Introductionsupporting

confidence: 55%

“…Depending on the chemical composition of the gas, DW in some mixtures have very regular cellular structure, whereas in other mixtures DW shows very irregular chaotic cell structure. A very regular cellular DW structure in hydrogen-oxygen-argon mixtures was studied in our previous 2D numerical simulation [1]. A good agreement was obtained between the numerical results and experimental data on the size a 0 over a wide range of initial pressures and degrees of mixture dilution by argon.…”

supporting

confidence: 55%

“…Furthermore, Figure 2b shows a significant amount of unburned pieces of gas at a considerable distance behind the DW leading shock front, denoted as P1 and P2. This phenomenon was not observed in simulations of regular mixtures based on hydrogen [1].…”

Section: Simulation Of 2d Structure Of Propagating Dw In a Rich Methamentioning

confidence: 71%

“…The DW was initiated near the left closed end of the channel and propagated from left to right along the x axis. The size and energy of the initiation source [1][2][3] were chosen sufficiently large to ensure a supercritical regime of DW initiation in methane mixture. The detonation cell size for the methane-based mixture was determined in a procedure similar to that used in the numerical study of stoichiometric hydrogen mixtures [1] with regular cellular structure.…”

Section: Simulation Of 2d Structure Of Propagating Dw In a Rich Methamentioning

confidence: 99%

“…The size and energy of the initiation source [1][2][3] were chosen sufficiently large to ensure a supercritical regime of DW initiation in methane mixture. The detonation cell size for the methane-based mixture was determined in a procedure similar to that used in the numerical study of stoichiometric hydrogen mixtures [1] with regular cellular structure. The initial height of the channel H was chosen rather arbitrarily; usually, it was assumed to be slightly higher than the presumed size of the cell a 0 .…”

Section: Simulation Of 2d Structure Of Propagating Dw In a Rich Methamentioning

confidence: 99%

See 4 more Smart Citations

Numerical simulation of classical and rotating detonation waves in methane mixtures

Trotsyuk

2017

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

A numerical simulations of a two-dimensional multi-front irregular structure of the detonation wave (DW) in methane-based mixtures at normal initial condition have been conducted. The computations have been performed in a wide range of channel height. From the analysis of the flow structure and the number of primary transverse waves in channel, the dominant size of the detonation cell for studied mixtures has been determined. We have simulated the cellular front structure in stoichiometric methane-air and methane-oxygen mixtures, and in a rich (equivalence ratio φ=1.5) methane-air mixture. Based on the fundamental studies of front structure of the classical propagating DW in methane mixtures, numerical simulation of continuous spin detonation of rich (φ=1.2) methane-oxygen mixture has been carried out in the cylindrical detonation chamber (DC) of the rocket-type engine. We studied the global flow structure in DC, and the detailed structure of the front of the continuous rotating DW. Integral characteristics of the detonation process -the distribution of average values of static and total pressure along the length of the DC, and the value of specific impulse have been obtained. The geometric limit of stable existence of rotating DW has been determined. IntroductionOne of the most important problems in the theory of dynamic systems is the formation and destruction of ordered gas-dynamic structures in a reactive medium. An example of such a self-organizing system is a multi-front (cellular) DW steadily propagating in a reacting gas mixture. The complex threedimensional and time-dependent structure of the front of these waves propagating in constant crosssection channels shows some order, whose geometrical parameter is the size of the elementary cell of the DW − a 0 . Based on this value, it is possible to determine such parameters of detonation as critical conditions of detonation combustion, the critical energy of initiation detonation propagation limits, etc., i.e. to estimate the detonation hazard of gaseous mixture. Depending on the chemical composition of the gas, DW in some mixtures have very regular cellular structure, whereas in other mixtures DW shows very irregular chaotic cell structure. A very regular cellular DW structure in hydrogen-oxygen-argon mixtures was studied in our previous 2D numerical simulation [1]. A good agreement was obtained between the numerical results and experimental data on the size a 0 over a wide range of initial pressures and degrees of mixture dilution by argon. Then we have simulated the irregular detonation structure in stoichiometric methane-air [2] and methane-oxygen [3] mixtures.

show abstract

Section: Introductionsupporting

confidence: 55%

supporting

confidence: 55%

Section: Simulation Of 2d Structure Of Propagating Dw In a Rich Methamentioning

confidence: 71%

Section: Simulation Of 2d Structure Of Propagating Dw In a Rich Methamentioning

confidence: 99%

Section: Simulation Of 2d Structure Of Propagating Dw In a Rich Methamentioning

confidence: 99%

See 3 more Smart Citations

Numerical simulation of classical and rotating detonation waves in methane mixtures

Trotsyuk

2017

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

Numerical simulation of steady shock and detonation wave configurations in a supersonic chemically reacting flow

2005

View full text Add to dashboard Cite

Effect of chemically inert particles on parameters and suppression of detonation in gases

Fomin

Chen

2009

Combust Explos Shock Waves

View full text Add to dashboard Cite

An algorithm for calculating the parameters of a steady one-dimensional detonation wave in mixtures of a gas with chemically inert particles and estimating the detonation-cell size in such mixtures is proposed. The calculated detonation parameters and cell size in stoichiometric hydrogen-oxygen mixtures with W, Al 2 O 3 , and SiO 2 particles are used to analyze the method of suppression of multifront gas detonation by injecting chemically inert particles ahead of the leading wave front. The ratio between the channel diameter and the detonation-cell size is used to estimate the limit of heterogeneous detonation in the mixtures considered. The minimum mass of particles and the characteristic cloud size necessary for detonation suppression are calculated. The effect of thermodynamic parameters of particles on the detonation suppression process is analyzed for the first time. Particles with a high specific heat and (if melting occurs) a high phase-transition heat are found to exert the most pronounced effect.

show abstract

Numerical simulation of the structure of two-dimensional gaseous detonation of an H2-O2-Ar mixture

Cited by 35 publications

References 19 publications

Numerical simulation of classical and rotating detonation waves in methane mixtures

Numerical simulation of classical and rotating detonation waves in methane mixtures

Numerical simulation of steady shock and detonation wave configurations in a supersonic chemically reacting flow

Effect of chemically inert particles on parameters and suppression of detonation in gases

Contact Info

Product

Resources

About