Investigation of Electrically Controlled Ammonium Nitrate – Epoxy Solid Propellant at High Pressures,Propellants, Explosives, Pyrotechnics

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Investigation of Electrically Controlled Ammonium Nitrate – Epoxy Solid Propellant at High Pressures
Propellants, Explosives, Pyrotechnics ( IF 1.7 ) Pub Date : 2021-01-27 , DOI: 10.1002/prep.202000208
Inna Zamir ₁ , Moshe Ben‐Reuven ₁ , Alon Gany ₁ , Dan Grinstein ₁

Affiliation

The effect of electric voltage/power application on the burning rate of solid propellants composed of ammonium nitrate (AN) and epoxy at high pressures was investigated experimentally. Such an effect can yield an effective means for real‐time managing of the thrust of a solid rocket motor. A burning rate increase up to about 4 folds when increasing voltage application from 70 V to 200 V, was demonstrated. It was attributed to energy (heat) release due to an electric current passing through the conductive melt layer formed at the burning surface. The relative increase in burning rate due to electric effect was higher at the lower pressure range, diminishing for the higher‐pressure end because of the lower relative electric energy contribution. The common pressure dependence correlation of the burning rate could be applied only for limited ranges. However, because of the coupling between the pressure and specific electric power (power per unit surface area) effects, a more complex correlation which includes a variable pressure exponent, was revealed and applied successfully to fit the data over a range of specific electric power and pressure.

中文翻译：

电控硝酸铵-环氧固体推进剂的高压研究

实验研究了电压/功率施加对高压下硝酸铵和环氧树脂组成的固体推进剂燃烧速率的影响。这样的效果可以为实时管理固体火箭发动机的推力提供有效的手段。当将施加的电压从70 V增加到200 V时，燃烧速率提高了约4倍。这归因于由于电流流过在燃烧表面上形成的导电熔体层而释放的能量（热量）。在较低的压力范围内，由于电效应引起的燃烧速率的相对增加较高，而在较高的压力端，由于相对的电能贡献较小，因此相对减少。燃烧速率的常见压力依赖性相关仅适用于有限范围。

更新日期：2021-03-04

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