Response of TEGDN Propellants to Plasma Ignition with the Same Magnitude of Ignition Energy as Conventional Igniters in an Interrupted Burning Simulator

Abstract

[a] 1Introduction Plasma-propellant interaction had been widely studied to understand the plasma ignition mechanismo fp ropellants [1][2][3][4][5][6][7],a ugmentation burning rate phenomena [8],a nd physical processes [ 9],a nd to benefit the design of the plasma generator to ignite the charge system during the gun or combustion simulator [10].A lso, there are many demonstration tests [11,12] in the electrothermalc hemical gun (ETC) and achieved valuable results to proof the advantage of plasma ignition, such as shorter and reproducible ignitiond elay time, reducedt emperature sensitivity of the propellant, and the possibility of easily adjustingt he electricalp arameters, whichi nfluence the ignition of the combustion process.Althought he plasma ignition systemh as many advantages, it is still encounteredw ith many challenges for its application in the ETC gun. From the viewpoint of propellant charge design, the propellantsa ppropriate to be ignited by plasma playedacriticalr ole in the application of ETC gun systemb asedo nt he intensive academic and practical research and developmento fE TC gun. The matcht est on the plasma ignitionf or new kinds of propellants has to be investigated to boost the development of specific propellants appropriate to be ignited by plasma, which were difficult to be ignited by convention ignition methods.In gun propellant chemistry,nitrocellulose (NC) and nitroglycerine (NG) basedg un propellants are highly prone to accidental initiationa sar esult of externals timulus (fire, shock wave, and impact). In ordert or educe the risks, high energy insensitive propellants are an attractive alternative for conventional NC/NG based propellants. The plasticizer triethyleneglycol dinitrate (TEGDN) is added to the system to partially replace nitroglycerine (NG) to increase the force of double-basep ropellants and reduce the sensitivity to the external stimulus. This kind of propellant is denoted as TEGDN propellant in the context. Meanwhile, the use of energetic polymer binderi .e. energetic thermoplastic elastomers (ETPE)i ni ts formulation is regardeda sapractical method to formulate high energy insensitive propellants [13,14].Significant progress on the small-scale test grid related with combustion and energy release was madei nt he development of high energy and insensitive propellants including energetic thermoplastic elastomers (ETPE) [15].Previousw ork [10] focused on the match tests to validate the electrothermal chemical (ETC) gun applicationf or the emergingi nsensitive high energy propellants with high loading density in small-scale demonstration test. The match test on propellant loading parametersa nd plasma Abstract:I no rder to consider the potential influenceo fignition energy factors on the responseo fd ouble basep ropellants plasticized with triethyleneglycol dinitrate (TEGDN propellants), the influence of different ignition methods at the same magnitude of ignition energy level on the response of TEGDN propellants was investigated in an interrupted burning simulator.C om...

Effect of shock wave formation on propellant ignition in capillary discharge

“…Kappen et al [25] investigated the plasma radiation to the propellant and proposed that the observed structural damage of translucent JA2 (triple-base gun propellant) samples is due to radiation only. Xiao et al [26] proposed that plasma ignition presents a significantly shorter ignition delay and lower ignition energy. There is a stronger ablation and impact interaction of plasma flow with the surface of the propellant.…”

Simultaneous determination of the component ratio and moisture content in TEGDN/NG composites by the qNMR method

“…With the increase in the TEGDN content ratio, the decomposition heat of NEPE propellants shows obvious decrease and rise under different pressure conditions. [7][8][9] Due to hydrolysis between the nitrate ester and H 2 O, the trace moisture content of TEGDN/NG will affect the safety performance, such as the sensitivity and compatibility. [10][11][12][13][14][15] Particularly for high-energy and high-sensitivity nitrate esters, tiny changes in moisture content could have a great impact on the safety performance in practice.…”

Numerical Simulation of Plasma‐Propellant Interaction Under the Non‐Fourier Model

“…In addition, reducing the temperature coefficient is also an advantage of ETC ignition . The main research directions of plasma ignition include: the comparison between plasma ignition method and conventional ignition method, the control of propellants combustion, the design of plasma capillary, the effects of plasma parameters on energy input and propellants combustion, and the influence of different propellant formulations on the ignition process . Edwards et al.…”