Energy distribution and radiative heat loss in electrothermal-chemical (ETC) closed chambers

Oberle, William F.; Wren, Gloria P.

doi:10.1109/20.738405

Cited by 5 publications

(2 citation statements)

References 2 publications

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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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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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“…Its main drawback is the relatively long time required for the ignition energy delivery. The conventional black powder ignition method can be updated by applying new materials (e.g., [1][2][3]) or by applying other ignition systems such as the plasma jet or current injection [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] as well as laser ignition [23][24][25][26][27][28]. Plasma jet ignition (PJI) is characterised by the very short time required for energy delivery.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Application of Plasma Ignition in Closed Vessel Tests

et al. 2021

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This paper presents the results of a comparative investigation into the effects of the ignition method on the ballistic properties of three types of propellants: a single-base propellant, a double-base propellant and a low vulnerability (LOVA) propellant, as determined via closed vessel tests (CVT). Conventional gunpowder ignition and plasma jet ignition methods were used. The influence of the ignition method on the values of the propellant characteristics obtained in CVT was analysed. It was found that the method of ignition has an influence on the values of propellant characteristics, determined in CVT. An analysis of the experimental form functions showed that plasma ignition is not a solution to the problems inherent to the process of determining the ballistic properties of propellants in which the burning process deviates from the geometric burning law.

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The science and technology of electric launch: a US perspective

Fair

Schmidt

1999

IEEE Trans. Magn.

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Energy distribution and radiative heat loss in electrothermal-chemical (ETC) closed chambers

Cited by 5 publications

References 2 publications

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

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

Analysis of Application of Plasma Ignition in Closed Vessel Tests

The science and technology of electric launch: a US perspective

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