Combustion and agglomeration of aluminized high-energy compositions

A G Korotkikh,K V Slyusarskiy,V A Arkhipov,O G Glotov

doi:10.1088/1757-899x/93/1/012032

A G Korotkikh, K V Slyusarskiy + Show 2 more

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https://doi.org/10.1088/1757-899x/93/1/012032

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Abstract

The results of combustion study for high-energy compositions (HECs) based on ammonium perchlorate (AP), butadiene rubber and ultrafine powder (UFP) aluminum Alex, and agglomeration of metal particles on the burning surface and composition of condensed combustion products (CCPs) are presented. It was found that partial replacement 2 wt. % of Alex by iron UFP in HEC increases the burning rate 1.3—1.4 times at the range of nitrogen pressure 2.0-7.5 MPa and reduces the mean diameter of CCPs particles d43 from 37.4 μm to 33.5 μm at pressure ∼ 4 MPa. Upon partial replacement 2 wt. % of Alex by boron UFP in HEC the recoil force of gasification products outflow from burning surface is increased by 9 % and the burning rate of HEC does not change in the above pressure range, while the mean diameter of CCPs particles is reduced to 32.6 μm at p ∼ 4 MPa.

Highlights

The modern high-energy compositions (HECs) contain as the oxidizer crystals of ammonium perchlorate (AP), ammonium nitrate (AN) and nitramines (RDX, HMX, CL-20) [1,2], combustiblebinder – inert or energetic polymer rubber, and metal fuel – aluminum powder with typical content up to 22 wt. % [3,4,5]
This paper presents the experimental results on combustion processes of HECs based on aluminum ultrafine powder (UFP) Alex, containing additives of iron and amorphous boron UFPs and the methods for determine of parameters: the recoil force of gasification products outflow, the burning rate of samples, and the quantitative and phase compositions, the size distribution of particles of condensed combustion products (CCPs)
Partial replacement of Alex by iron UFP in HEC leads to the increase of the recoil force of gasification products outflow from burning surface 1.3 times in the period of stationary combustion of HECs

Summary

Introduction

The modern high-energy compositions (HECs) contain as the oxidizer crystals of ammonium perchlorate (AP), ammonium nitrate (AN) and nitramines (RDX, HMX, CL-20) [1,2], combustiblebinder – inert or energetic polymer rubber, and metal fuel – aluminum powder with typical content up to 22 wt. % [3,4,5]. The modern high-energy compositions (HECs) contain as the oxidizer crystals of ammonium perchlorate (AP), ammonium nitrate (AN) and nitramines (RDX, HMX, CL-20) [1,2], combustiblebinder – inert or energetic polymer rubber, and metal fuel – aluminum powder with typical content up to 22 wt. This paper presents the experimental results on combustion processes of HECs based on aluminum ultrafine powder (UFP) Alex, containing additives of iron and amorphous boron UFPs and the methods for determine of parameters: the recoil force of gasification products outflow, the burning rate of samples, and the quantitative and phase compositions, the size distribution of particles of condensed combustion products (CCPs).

Experimental

Results and discussion

Conclusions