Interrupted-Burning Tests of Plasma-Ignited JA2 and M30 Grains in a Closed Chamber

Birk, Avi; Guercio, Miguel Del; Kinkennon, Amy E.; Kooker, Douglas E.; Kaste, Pamela J.

doi:10.1002/1521-4087(200006)25:3<133::aid-prep133>3.0.co;2-g

Cited by 25 publications

(5 citation statements)

References 2 publications

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“…The temporal enhancement of burning rate of M30 grains due to plasma ignition (ETC), ( u= 11.441p 0.456 ) has been investigated by Birk et al in Ref. [91]. The influence of different types of nitrocellulose on both M15 and M30 type propellant has been studied in Ref.…”

Section: Gun Propellantsmentioning

confidence: 99%

Insensitive High Explosives: V. Ballistic Properties and Vulnerability of Nitroguanidine Based Propellants

Koch¹

2021

Propellants Explo Pyrotec

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This paper reviews the ballistic properties, stability and vulnerability of gun propellants, gas generators and rocket propellants containing nitroguanidine (NGu), CAS−No [556‐88‐7] as an energetic filler. Nitroguanidine and its formulations burn stable over a broad pressure regime extending from subatmospheric to high pressures (0.1 kPa–400 MPa). Its high nitrogen content (53.83 %) and oxygen balance (Ω=‐30.75 %) effects a high gas pressure in gun propellants combined with low explosion temperature and consequently low signature and reduced erosion. NGu is an effective stabilizer for a broad array of energetic materials encountered in gun and rocket propellants including AP, ADN, HMX, RDX, NGl and also materials with low thermal stability such as NC, HNF, TNAZ and ADN. Finally, the low vulnerability of NGu‐based propellant formulations makes them taylor made to serve insensitive munitions. This review covers 31 NGu‐based rocket and gas generating propellant formulations, 44 gun propellants, five of which contain guanylurea dinitramide, (GuDN, FOX‐12), CAS−No [217464‐38‐5] for comparison, four reference propellants containing neither of the aforementioned ingredients and six combustible cartridge case formulations based on NGu. In addition, the combustion properties of pure NGu, pure GUDN and NGu modified with 17 different catalysts are revised. The review contains 142 references from the public domain.

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Section: Gun Propellantsmentioning

confidence: 99%

Insensitive High Explosives: V. Ballistic Properties and Vulnerability of Nitroguanidine Based Propellants

Koch¹

2021

Propellants Explo Pyrotec

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“…In order to get the burning surface of R-MNEGP and MNEGP, extinguished R-MNEGP and MNEGP measurements were conducted by interrupted burning in a 100 cm 3 closed vessel (100 MPa). Rapid extinguishment of the propellants occurs due to the break-through of the pressureproof copper sheet and the consequent sudden expansion into an evacuated tank [41]. The morphologies of the interrupted burning surfaces in different initial temperature of R-MNEGP and MNEGP were characterized by scanning electron microscope (SEM, FEI, Quanta 250FEG) at an accelerating voltage of 15.0 kV, after coating with gold for 120 s under vacuum (À 10 À 6 Pa).…”

Section: Characterizationmentioning

confidence: 99%

Temperature Sensitivity Coefficients of RDX‐Based Propellants and Their Mixed Charges

You

Zhu

Liu

et al. 2021

Propellants Explo Pyrotec

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Low temperature sensitivity coefficients of gun propellants are of great significance for improving the stability of weapon performances. In this work, RDX-NC-NG-DEGDN propellants (R-MNEGP) were prepared to reduce the temperature sensitivity coefficient of mixed charges. The temperature sensitivity coefficients of R-MNEGP, NC-NG-DEGDN propellants (MNEGP) and their mixed charges were studied by closed vessel tests, scanning electron microscope (SEM), and ballistic firing experiments. The results show that the increased burning surface of R-MNEGP compensates the decrease in the burning rate of the propellant when the initial temperature is decreased compared with MNEGP. The temperature sensitivity coefficient of R-MNEGP is lower than that of MNEGP, and the temperature sensitivity coefficients of the mixed charges (R-MNEGP and MNEGP) are between these two temperature sensitivity coefficients in the range of À 40°C-20°C and 20°C-50°C. Compared with MNEGP, the velocity temperature sensitivity coefficients of the mixed charges with 6 wt % and 10 wt % R-MNEGP decreased by 34.86 % and 70.67 %, and the pressure temperature sensitivity coefficients of these decreased by 42.99 % and 100.90 % with increasing temperature from À 40°C to 15°C. And the velocity temperature sensitivity coefficients had no significant change, and the pressure temperature sensitivity coefficients decreased by 2.58 % and 77.98 % in the range of 15°C-50°C. This study offers an attractive strategy for tuning the temperature sensitivity coefficient by mixing charges of R-MNEGP and MNEGP with different temperature sensitivity coefficients.

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“…Thermite compositions consisting of a metal fuel and an oxidant (e.g., WO 3 /Al, Bi 2 O 3 , and Al/CuO/Fe 3 O 4 ) and foamed nitrocellulose with the addition of titanium particles were tested as alternative ignition materials [35][36][37][38][39]. In the case of other ignition methods, there has been interest in electrothermal-chemical (ETC) ignition-where the factor directly affecting the propellant is hot plasma-laser ignition, and gas ignition (e.g., a methane/oxygen mixture) [40][41][42][43][44][45][46][47][48][49][50][51][52][53].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Ignition Method on the Characteristics of Propellant Burning in the Context of the Geometric Burning Model

2023

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Mathematical models for the simulation of the operation of various projectile-throwing systems are continuously modified, simultaneously with the development of propellants. For these models, properly determined values of energetic ballistic characteristics of propellants are very important. This paper presents an original test and the results of closed vessel comparative investigations. The study analyses specific combustion characteristics of single-base propellants using conventional black powder ignition, plasma ignition, and gas ignition. The results of the study indicate the need to take into account—in the calculation of the burning rate—not only the dynamics of gas pressure changes but also the real (experimental) form function, which differs from the theoretical one resulting from the assumed geometric burning model. The obtained results allow for a critical analysis of the existing methods used for the determination of values of ballistic characteristics of propellants. Further, it will allow for creating pyrostatic test conditions that would reflect the condition of instantaneous ignition of propellant grains over their entire surface in the most realistic way.

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Interrupted-Burning Tests of Plasma-Ignited JA2 and M30 Grains in a Closed Chamber

Cited by 25 publications

References 2 publications

Insensitive High Explosives: V. Ballistic Properties and Vulnerability of Nitroguanidine Based Propellants

Insensitive High Explosives: V. Ballistic Properties and Vulnerability of Nitroguanidine Based Propellants

Temperature Sensitivity Coefficients of RDX‐Based Propellants and Their Mixed Charges

Influence of the Ignition Method on the Characteristics of Propellant Burning in the Context of the Geometric Burning Model

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