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Studies of the Combustion of Solid Propellants at High Pressures

✍ Scribed by D. Grune

Publisher
John Wiley and Sons
Year
1976
Tongue
English
Weight
248 KB
Volume
1
Category
Article
ISSN
0721-3115

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✦ Synopsis

Abstract

To determine burning velocities of solid propellants at high pressures, a new type of manometric bomb of 0.1 1 volume has been designed. Tightening is provided by a cartridge section from a 30 mm HS 831 steel case. 3 0 to 50 ms after the maximum, the pressure is automatically released by erosion of a 1 mm nozzle, this time lag being given by the electric igniter placed before the nozzle and by blocking it for a short time.

The bomb has been applied to measure pressures p in a range up to 7000 bar as a function of loading density A for a double base propellant. The curve p(A) shows a change of slope at about 5000 bar for which explanation is still lacking.

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The ignition of composite solid propellants by CO 2 laser irradiation at low pressures has been investigated experimentally. Three ignition modes are found at subalJnospheric pressures: self-sustaining ignition, non-self-sustaining ignition, and pulsating ignition. Here, the self-sustaining and the