Influences of particle size and content of HMX on burning characteristics of HMX-based propellant

Naya, Tomoki; Kohga, Makoto

doi:10.1016/j.ast.2012.08.012

Cited by 37 publications

(11 citation statements)

References 20 publications

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“…A lesser effect was observed for the fine 5 micrometer particles since the propellant is more homogeneous. Naya and Kohga observed weak particle size dependence for RDX [13] and HMX [14] mean particle diameters below 145 micrometer. Interestingly, Pivkina et al [15] reported burning rates of neat nano-RDX and observed that nano-RDX burns faster than its micrometer scale counterpart at higher pressures although any influence on convective burning was not discussed.…”

Section: Introductionmentioning

confidence: 96%

Influence of Particle Size on the Combustion of CL‐20/HTPB Propellants

Kalman¹,

Essel²

2017

Propellants Explo Pyrotec

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The effect of nitramine particle size on the combustion behavior of inert binder based propellants has been extensively studied for RDX and HMX, but not CL-20. Although materials such as RDX and HMX are useful for particular combustion applications, CL-20 has a greater potential to improve the oxygen balance and energy density of a propellant. The current work investigates the effect of CL-20 particle size on the combustion of CL-20/HTPB propellants down to submicrometer sizes. An influence of particle size on the burning rate and combustion mechanism is reported. The 30 micrometer formulation burning rate data showed evidence of convective burning specifically at higher pressures, but the pressure dependence was comparable to neat CL-20 at pressures below 8 MPa. A change in the combustion mechanism of the submicrometer formulation as a function of pressure was determined to be a result of the interaction of the propellant flame and the combustion residue. Data suggested that at low pressures diffusion in terms of active cooling was dominant for the submicrometer formulation. Higher pressure data for both the submicrometer and 3 micrometer formulations suggest the degree of active cooling is decreased as the burning rate pressure exponent is near 0.5 for both propellants. The indirect evidence for the presence of a melt layer for CL-20 propellants is discussed.

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Section: Introductionmentioning

confidence: 96%

Influence of Particle Size on the Combustion of CL‐20/HTPB Propellants

Kalman¹,

Essel²

2017

Propellants Explo Pyrotec

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“…In the coming years to reduce environmental problems, various research studies will be carried out to produce smokeless combustible energy fuels without chlorine. Many studies support the use of HMX and RDX [2] as an oxidant instead of AP, addition of magnesium [3] into the rocket fuel of AP, the use of ADN [4] and energy fuels based on AN [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Combustion Study of Different Transitional Metal Oxide based on AN/MgAl Composites Gas Generators

Камунур

Jandosov

Абдулкаримова

et al. 2017

Eurasian Chem. Tech. J.

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Ammonium nitrate (AN)-based composite gas generator have attracted a considerable amount of attention because of the clean burning nature of AN as an oxidizer. However, ammonium nitrate-based gas generator has several major problems, namely, poor ignitability, a low burning rate, low energy, and high hygroscopicity. The addition of different transitional metal oxides and MgAl mechanical alloyed proved to be effective in improving the burning characteristics of AN-based gas generator. In this research work, combustion study of different transition metal oxide based on AN/MgAl composites gas generators was studied. Gas generators were combusted at the pressure of 1 MPa, 3 MPa and 5 MPa in the combustion chamber and the burning rates were determined. It was stated that the addition of metal oxides into the composition of the gas generators improves ignition at low pressure and increases the burning rate. The use of the mechanical MgAl alloys as a fuel allowed the ignition of the gas generator at a lower temperature. The method of thermogravimetric/differential thermal analyzer (TG/DTA) was used to investigate the effect of metal oxides addition on the AN/MgAl-based gas generators thermal decomposition characteristics.

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“…But adding RDX produces many problems, such as higher mechanical sensitivity and worse mechanical properties [7][8][9][10]. Previous research has shown that reducing the size of solid filler particles can solve these problems and also enhance the burning rate of propellants [11][12][13][14]. In addition, the mechanical sensitivity of CMDBs can be decreased if the particles coated with some binders [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of RDX-Nitrocellulose Microspheres

Wang¹,

Shi²,

Li³

2016

Cent. Eur. J. Energ. Mater.

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Abstract:A new insensitive explosive based on RDX and with Nitrocellulose (NC) as binder has been prepared using a flash vaporization process. Scanning electron microscopy was used to characterize the morphology and particle size of the resulting RDX-NC microspheres. X-ray photoelectron spectroscopy, Differential Scanning Calorimetry, impact sensitivity, vacuum stability and burning rate of raw RDX, RDX-NC and RDX-1 were also used to characterize the explosive. The RDX-NC microspheres were found to have a fibrous surface. The microspheres ranged in size from 0.5 μm to 4 μm. The NC formed a coat on the surface of the RDX. The activation energies of raw RDX, RDX-1 and RDX-NC were found to be 200.8 kJ·mol , respectively. The drop heights of raw RDX, RDX-1 and RDX-NC were found to be 21.3 cm, 51.7 cm and 82.9 cm, respectively. The friction sensitivity of RDX-NC was lower than that of raw RDX and RDX-1. In the vacuum stability test, the volumes of evolved gas from raw RDX, RDX-1 and RDX-NC were 0.12 mL·g Keywords: RDX, nitrocellulose, flash vaporization process, thermal stability Nomenclature ListH 50 = 50% explosion probability, S = standard deviation, β i = heating rate in K·min

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Influences of particle size and content of HMX on burning characteristics of HMX-based propellant

Cited by 37 publications

References 20 publications

Influence of Particle Size on the Combustion of CL‐20/HTPB Propellants

Influence of Particle Size on the Combustion of CL‐20/HTPB Propellants

Combustion Study of Different Transitional Metal Oxide based on AN/MgAl Composites Gas Generators

Preparation and Properties of RDX-Nitrocellulose Microspheres

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