Radiant ignition studies of ammonium perchlorate based propellants

Atwood, Alice I.; Ford, K. P.; Bui, David T.; Curran, P. O.; Lyle, T. M.

doi:10.1051/eucass/200901121

Cited by 9 publications

(5 citation statements)

References 11 publications

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“…A set of equations (1-2) with initial and boundary conditions (3)(4)(5)(6) was solved numerically by using an explicit finite difference scheme for three different values of the absorption coefficient of the mixture μ (μ = 1000; 3700; 10,000 cm À 1 ). An approximate value of μ = 3700 cm À 1 was obtained in [18].…”

Section: Effect Of Heat Dissipation Into Pmmamentioning

confidence: 99%

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Laser Ignition of Ammonium Perchlorate/Aluminum Composition Confined into PMMA Capsule

Tsipilev

Forat

Medvedev

et al. 2022

Propellants Explo Pyrotec

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A two-component composition of ammonium perchlorate and nanosized aluminum powder can be ignited by millisecond Nd laser radiation. However, the mixture exposed to laser radiation pulse through polymethyl methacrylate (PMMA) capsule demonstrates less sensitivity when compared to ignition of the uncovered sample. Such behavior is uncommon to gasified energetic materials. It is shown that the sensitivity of uncovered samples does not change if the surrounding atmosphere is changed from air to argon. It was found that the cover of PMMA decreases the sensitivity of the mixture due to heat dissipation from the ignition zone, thereby reducing its reactivity.

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Section: Effect Of Heat Dissipation Into Pmmamentioning

confidence: 99%

“…Ammonium perchlorate (AP) and aluminum powders are widely used in solid rocket propulsion [1][2][3][4]. A two-component AP/Al mixture is the energetic material capable of combustion and explosion under certain conditions [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Laser Ignition of Ammonium Perchlorate/Aluminum Composition Confined into PMMA Capsule

Tsipilev

Forat

Medvedev

et al. 2022

Propellants Explo Pyrotec

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show abstract

“…Solid propellant charges are prone to burning or exploding under unexpected thermal stimulation, leading to catastrophic accidents [1,2]. Ammonium perchlorate (AP) is the most abundant ingredient in solid composite propellants and is widely used in solid propellant engines and aerospace boosters, where the AP content is over 70% [3,4]. AP has many advantages, including an ideal density, a favorable oxygen balance, and tailorable burn rates.…”

Section: Introductionmentioning

confidence: 99%

Evolution of the Micropore Structure of Ammonium Perchlorate during Low-Temperature Decomposition and Its Combustion Characteristics

et al. 2021

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Ammonium perchlorate (AP) is a common oxidant in solid propellants, and its thermal decomposition characteristics at low temperatures (less than 240 °C) are key to the study of the thermal safety of propellants. Here, the low-temperature thermal decomposition characteristics of AP were investigated at 230 °C. The micromorphology of the low-temperature decomposition residues was characterized by scanning electron microscopy and 3D nano-computed tomography in order to analyse the evolution of microscopic pore structures, and the effect of the AP pore structure on combustion performance was then tested and analysed with a homemade closed bomb. The results demonstrate that the low-temperature decomposition of AP first occurs near the surface of the particles, simultaneously starting at multiple points and forming pores, and then gradually expands towards the interior until almost all of the pores connect with one other. Compared with ordinary AP, porous AP has a significantly improved combustion rate. When the ratio of porous AP to Al was 80:20, the peak pressure in the closed bomb was increased by 2.7 times; the rate of change in peak pressure increased 34 times, leading to a higher reaction speed and higher reaction intensity, and a typical explosion reaction occurred.

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“…Cain [6] studied the relationship between AP/HTPB propellant ignition characteristics and the optical properties through the radiation ignition experiment. Atwood [7] used CO 2 laser to study the ignition characteristics of AP composite propellant under different pressure and heat flux. The effects of pressure and heat flux on the time of first light (FL) and go/no-go (GNG) were obtained.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Laser Ignition and Combustion Characteristics of NEPE Propellant

Chen

Zhou

et al. 2017

Prop., Explos., Pyrotech.

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The ignition and combustion property of solid propellant is the main content in internal ballistic research, which has a great significance for propulsion application and combustion mechanism. In this study, the detailed gas‐phase reaction mechanism of Nitrate Ester Plasticized Polyether Propellant (NEPE) was developed. It is helpful to understand the intricate processes of solid‐propellant combustion. The factors which may have influences on ignition delay time and temperature distribution of propellant surface was analyzed by laser ignition experiment. Using high‐speed camera and an infrared thermometer, the ignition and combustion process and the surface temperature distribution of NEPE propellant under laser irradiation were measured. Laser heat flux, ambient pressure and initial temperature of NEPE propellant have an influence on the ignition delay time and the surface temperature. Results show that the ignition delay time decreases with the increase of laser heat flux, ambient pressure and initial temperature of NEPE propellant. At the same time, with the increase of laser heat flux, the influences of ambient pressure and initial temperature on the ignition delay time decrease. Besides, laser irradiation, ambient pressure and initial temperature have significant influences on the surface temperature distribution of the propellant.

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Radiant ignition studies of ammonium perchlorate based propellants

Cited by 9 publications

References 11 publications

Laser Ignition of Ammonium Perchlorate/Aluminum Composition Confined into PMMA Capsule

Laser Ignition of Ammonium Perchlorate/Aluminum Composition Confined into PMMA Capsule

Evolution of the Micropore Structure of Ammonium Perchlorate during Low-Temperature Decomposition and Its Combustion Characteristics

Experimental Investigation on Laser Ignition and Combustion Characteristics of NEPE Propellant

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