Combustion Behavior of the Inorganic Nitrates‐Based Compositions. Part II: Effect of Al and Al‐Mg Alloy on Burning Rate

Denisyuk, A. P.; Tuan, Nguyen Duy; Sizov, Vladimir A.

doi:10.1002/prep.202100145

Cited by 6 publications

(3 citation statements)

References 21 publications

(34 reference statements)

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“…Experiments have shown that this also applies to the combustion catalysis of trinitrophenol 25 . Previously, 26,27 it was assumed that leading combustion zone for double‐base propellants with catalysts is the c‐phase reaction layer, even if the catalysts have an effect in the gas zone, based on the thermal balance of the c‐phase data.…”

Section: Resultsmentioning

confidence: 99%

Burning rate catalysts action on the trinitroresorcinol combustion wave parameters

Denisyuk

Aung

Sizov

et al. 2023

Int J of Chemical Kinetics

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The effect of burning rate catalyst—3% nickel salicylate (NS) with 1% carbon nanotubes (CNT)—on the combustion wave parameters of trinitroresorcinol (TNR) at 2 MPa as well as on the structure and elemental composition of the carbon frame on the surface of quenched TNR samples at 2 and 15 MPa were studied. The catalyst itself increases the burning rate by ∼4.3 times. It is shown that for the sample with NS and CNT, the accumulation of nickel particles formed during the decomposition of the catalyst occurred (∼110 times) at 2 MPa on the carbon frame. The degree of catalyst particles accumulation at 15 MPa is ∼60 times lower than at 2 MPa, so the burning rate increases by only 1.3 times. At 2 MPa the catalyst significantly (by ∼68 K) increases the combustion surface temperature, by ∼2.7 times increases the temperature gradient in the carbon frame zone, and reduces the length of the primary (fizz zone) and secondary flames. As a result, the heat release rate on the frame is 13.5 times higher than on the carbon frame of the sample without a catalyst. For TNR samples the thermal conductivity coefficient, based on the characteristics of the framework obtained, was calculated, and it was shown that the thermal conductivity coefficient of the carbon frame for a sample with NS and CNT is significantly (∼8 times) higher than for a sample without a catalyst. From the calculation of the heat balance of the c‐phase at 2 MPa it follows that the combustion leading zone of the sample with a catalyst is the carbon frame, from which ∼98% of the necessary for combustion propagation heat enters the c‐phase; for a sample without a catalyst, the heat gain from the gas zone is ∼20%; the leading zone is the reaction layer of the condensed phase. Thus, the mechanism of combustion catalysis of aromatic nitro compounds is the same as for double‐base propellants. Two conditions are necessary for combustion catalysis: the formation of a carbon frame on the combustion surface, on which catalyst particles accumulate, and the carbon frame thermal conductivity coefficient must be significantly higher than that of the gas zone above combustion surface of the sample without a catalyst.

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Section: Resultsmentioning

confidence: 99%

Burning rate catalysts action on the trinitroresorcinol combustion wave parameters

Denisyuk

Aung

Sizov

et al. 2023

Int J of Chemical Kinetics

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“…For example, double base propellants, even with a high content of nitroglycerine (to 50 -70 %), burn at a speed of 0.9 -1.2 mm/s; gunpowder based on diethylene glycol dinitrate does not burn. In our previous work KNO 3 -based compositions with oxidizer excess coefficient (α) have an increased ability to burn at atmospheric pressure [20,21]. For most studied KNO 3 -based samples in [20], the dependence of burning rate on pressure consists of two sections: in the first section, the value of n is 0.06 -0.28, and in the second section, the value of n is much higher: 0.47 -1.56.…”

Section: Resultsmentioning

confidence: 99%

Influence of some additives on burning rate of KNO3-based compositions

Tuan,

A. P.,

Khai

et al. 2023

Vietnam J. Sci. Technol.

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In this article effect of some additives on combustion behaviour of high energetic compositions based on KNO3 was studied. The KNO3-based samples were made by mixing, rolling, and pressing. Investigated additives were: copper salicylate, nickel salicylate, copper-lead phthalate, nickel-lead phthalate, soot and carbon nanotubes. Burning rate was determined by the pressure increasing by using modification of the corner point method. It is shown that individual additives insignificantly effect on the burning rate of studied samples. The carbon nanotubes brand TMD with specific surface area ~270 m2/g and copper salicylate are the most effective additives on the burning rate. It should be noted that copper salicylate with carbon nanotubes have a significantly greater effect on the burning rate than individual additives or the catalyst with soot.

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“…The use of Mg alloys has become an effective mean [8][9][10]. Among them, Al12Mg17 has low melting and boiling point, and Mg in Al12Mg17 can be rapidly vaporized when burning [11]. Moreover, Al12Mg17 has low ignition temperature, stable combustion performance, and the addition of aluminium can improve the energy density of Al12Mg17 [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Effect of CuO powder on the combustion and micro-explosion of Mg and Al12Mg17 particles

Xie¹,

Zhang²,

Ma³

et al. 2023

J. Phys.: Conf. Ser.

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In this paper, the effects of CuO powder on the combustion and micro-explosion characteristics of Mg and Al12Mg17 were studied. A laser was used to ignite particles and a high-speed micro-camera was used to record the particle ignition, flame propagation, combustion and particle changes before and after micro-explosion. Moreover, emission spectra during combustion and combustion products were analysed. The results show that the addition of CuO contributes to the micro-explosion of Mg particles during combustion, but it is not conducive to the micro-explosion of Al12Mg17 particles. Meanwhile, whether Al12Mg17 particles or Al12Mg17/CuO particles, the radiation peaks during combustion mainly correspond to Mg or MgO, which means that the addition of CuO cannot promote the gas phase combustion of Al in Al12Mg17.

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Combustion Behavior of the Inorganic Nitrates‐Based Compositions. Part II: Effect of Al and Al‐Mg Alloy on Burning Rate

Cited by 6 publications

References 21 publications

Burning rate catalysts action on the trinitroresorcinol combustion wave parameters

Burning rate catalysts action on the trinitroresorcinol combustion wave parameters

Influence of some additives on burning rate of KNO3-based compositions

Effect of CuO powder on the combustion and micro-explosion of Mg and Al12Mg17 particles

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