Abstract
Increasing the velocity of gases inside solid rocket motors with low port-to-throat area ratios, leading to increased occurrence and severity of burning rate augmentation due to flow of propellant products across burning propellant surfaces (erosive burning), erosive burning of high energy composite propellant was investigated to supply rocket motor design criteria and to supplement knowledge of combustion phenomena, pressure, burning rate and high velocity of gases all of these are parameters affect on erosive burning. Investigate the phenomena of the erosive burning by using the 2’inch rocket motor and modified one. Different tests applied to fulfil all the parameters that calculated out from the experiments and by studying the pressure time curve and erosive burning phenomena.
Highlights
The erosive burning refers to the increase in the propellant burning rate caused by the high-velocity flow of combustion gases over the burning propellant surface[1]
In this paper we present some factors which affect the erosive burning phenomena, and by coding a MATLAB code to investigate the internal ballistic of the rocket motor
The computer program is capable of calculating performance prediction of tabular grain and draw pressure time curve, the program computes in SI units which are used to calculate the main parameters and performance of solid propellant rocket motor, the program may be used for rocket of all size, the main task of the program is to draw the P-T curve and to calculate and the phenomena of the erosive burning
Summary
The erosive burning refers to the increase in the propellant burning rate caused by the high-velocity flow of combustion gases over the burning propellant surface[1] It can seriously affect the performance of solid propellant motors. Erosive burning causes early burn out of the web usually at the nozzle end and lets out the insulation and ceasing to hot combustion gas for a large period of the fourth dimension. This usually needs more insulation layer thickness (and more inert mass) to prevent local thermal failure[4, 5]. Some experiments will take part for describe the phenomena of erosive burying which takes part in small 2 inch rocket motor and by modified solid rocket motor which shows clearly the phenomena of the erosive burning
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