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IMPACT ASSESSMENT OF COMBUSTION PRODUCTS OF SOLID HETEROGENEUS PROPELLANTS ON COAL SAMPLES IN A LABORATORY ROCKET MOTOR
Abstract
The paper presents research results from combusting high-energy solid rocket fuels (propellants) in laboratory rocket motor (LRM). The process of combusting high-energy fuel is characterized by fast chemical reaction, which causes creating a gaseous product with high pressure, which is able to produce a secondary system of fractures in the coal. The value of pressure from combusting propellants can be controlled in a laboratory rocket motor by an appropriate selection of mass of the fuel and the diameter of the nozzle. For testing purposes, the nozzle was replaced with a coal cylinder samples, which were directly affected by the pressure of powder gases in the sealed combustion chamber in the test system. With the use of sensors, pressure inside the combustion chamber was registered during every attempt of propellants? ignition. Additionally, to assess the effectiveness of fracturing, coal samples were scanned by X-ray computed tomography (CT) before and after the fireground tests. The obtained roentgenograms were processed using specialized computer software for 3D images and data of test results. The aim of the paper is to present at and compare the data of fractures growth and pressure changes, which were created in result of combusting high-energy materials and coal fracturing.
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References8
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www.thegasgun.com, date: 12.05.2019
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