Characteristics of HMX combustion waves at various pressures and initial temperatures

Зенин, А. А.; Пучков, В. М.; Finyakov, S. V.

doi:10.1007/bf02672817

Cited by 21 publications

(71 citation statements)

References 1 publication

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“…3. The RDX temperature profiles (like those for HMX [4,8]) have a single-zone structure of the gas phase.…”

Section: Temperature Distributions In Combustion Wavesmentioning

confidence: 99%

“…This displacement can be easily taken into account, and the real temperature distribution can be recovered [11]. As in the case of HMX, the thermal diffusivity of the thermal layer of the RDX condensed phase (c-phase) noticeably increases with increasing pressure and mean temperature of this layer (see below), which allows reliable measurements of the temperature profile in the c-phase at high pressures [8]. RDX combustion also has a one-dimensional and steady character, which permits one to use simple formulas for determining the heat transfer from the gas to the condensed phase by mean of heat conduction and for estimating heat release in the reaction layer of the c-phase [8].…”

Section: Research Techniques Experimental Setupsmentioning

confidence: 99%

“…An increase in the initial temperature normally reduces the values of ϕ 0 , q, and Q. Radiative heat transfer to the c-phase from the gas q r is low (substantially lower than q and Q). RDX combustion (like HMX combustion [4,8]) ensures a rather complete reaction: the flame temperature exceeds 1500 • C at subatmospheric pressures, and…”

Section: Parameters Of Combustion Zones (ϕ 0 Q Q T F and L)mentioning

confidence: 99%

“…The mass burning rate was determined by different methods: optical method, with the help of a photorecorder, by the time between the signals from thermocouples built into the samples at a known distance, and by the readings of a sensitive pressure gauge registering the beginning and end of combustion of the sample with a known length. The temperatures of the burning surface T s were determined by means of visualization and by the inflection in the records of temperature at the place the thermocouple junction reached the surface [8][9][10]. The instrumental error of measuring the burning rate and temperature was approximately 1%.…”

Section: Research Techniques Experimental Setupsmentioning

confidence: 99%

“…The structure of RDX combustion waves was studied with the use of a microthermocouple technique described in [8][9][10], as applied to combustion waves in various powders and HMX. Tungsten-rhenium band thermocouples 2-7 µm thick were inserted into the samples during their pressing.…”

Section: Research Techniques Experimental Setupsmentioning

confidence: 99%

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Characteristics of RDX combustion zones at different pressures and initial temperatures

Зенин

Finjakov

2006

Combust Explos Shock Waves

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The RDX burning rates and temperature profiles in the combustion wave are measured with the pressure and initial temperature varied within wide limits. Parameters of combustion waves are found. The gas phase of RDX is demonstrated to have a single-zone structure. Two regimes of RDX combustion are found: a basic regime at p > 0.1 MPa and a special regime at p 0.1 MPa. The main characteristics of these regimes are obtained, and the wave regions responsible for the burning rate are determined. Both regimes are characterized by wide reaction zones in the gas phase. The processes of vaporization and decomposition of the condensed phase proceed simultaneously on the burning surface. The fraction of thermal expansion in the reaction layer of this phase is estimated. Laws of RDX gasification (pyrolysis) in the combustion wave are found, which turn out to be the same as those for HMX. Distributions of the heat-release rate in the combustion wave (in the reaction layer of the condensed phase and in the gas phase) are obtained. Sensitivity of the burning rate to the initial temperature is measured.

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“…3. The RDX temperature profiles (like those for HMX [4,8]) have a single-zone structure of the gas phase.…”

Section: Temperature Distributions In Combustion Wavesmentioning

confidence: 99%

Section: Research Techniques Experimental Setupsmentioning

confidence: 99%

Section: Parameters Of Combustion Zones (ϕ 0 Q Q T F and L)mentioning

confidence: 99%

Section: Research Techniques Experimental Setupsmentioning

confidence: 99%

Section: Research Techniques Experimental Setupsmentioning

confidence: 99%

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Characteristics of RDX combustion zones at different pressures and initial temperatures

Зенин

Finjakov

2006

Combust Explos Shock Waves

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Stability of Self-Sustaining Combustion of Energetic Materials with Pronounced Condensed Phase Reactions

Gusachenko

Зарко

2005

Propellants, Explosives, Pyrotechnics

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Typically, simulations of the combustion of energetic materials have focused on a detailed description of the processes in the gas phase. This is due to an implicit assumption that the burning rate control zone is located in the gas phase at moderate pressures. However, at the present time new arguments in favor of the concept of the condensed phase being the locus of the burning rate control zone for typical energetic materials in "rocket" pressure range have become available. These are based on data of the temperature profiles in the combustion wave of modern energetic materials. Analysis shows that, with pronounced heat release in the condensed phase, self-sustaining combustion can be unstable. This effect may result in the existence of combustion regimes with "cross-surface" combustion waves. The difficulty of formulating a description of the combustion of energetic materials with pronounced condensed phase reactions are discussed.

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Deflagration Phenomena in Energetic Materials: An Overview

Jackson

2009

Non-Shock Initiation of Explosives

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Characteristics of HMX combustion waves at various pressures and initial temperatures

Cited by 21 publications

References 1 publication

Characteristics of RDX combustion zones at different pressures and initial temperatures

Characteristics of RDX combustion zones at different pressures and initial temperatures

Stability of Self-Sustaining Combustion of Energetic Materials with Pronounced Condensed Phase Reactions

Deflagration Phenomena in Energetic Materials: An Overview

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