Ignition and Combustion Performance of the Primary Condensed-phase Combustion Products from Boron-based Fuel-rich Propellants

Abstract

Abstract:The primary condensed-phase combustion products of a boron-based fuel-rich propellant were ignited using a high-power CO2 laser in a pressurized and windowed combustion chamber under variable pressure. The ignition and combustion performances were characterized using an ultraviolet-visible spectrometer and a high-speed camera. The experimental results showed that the combustion of the condensed-phase combustion products originate from the combustion of carbon, and boron may not take any part in the combustion process because of the formation of a thick boron oxide coating and agglomeration after the primary combustion process. Both particle size and the ingredients play an important role in the combustion reaction of the condensed-phase products. It was observed that a lower particle size and a higher boron carbide content are beneficial for the combustion reaction of the products; higher primary and secondary combustion pressures clearly improved the secondary combustion efficiency of the propellant in the combustion reaction.

Boron Carbide Nanowires from Castor Oil for Optronic Applications: A Low-Temperature Greener Approach

“…Ceramic materials are high strength materials and are chemically and thermally stable. Among ceramic materials, boron carbide (BC) nds widespread applicationslightweight armors, blast nozzles, ceramic bearing, brake linings, cutting tools, rocket propellant in the aerospace industry, and neutron absorber and shielding material in the nuclear industry [11][12][13][14] -due to its unique properties -greater hardness, high thermal and chemical stability, high neutron absorption cross-section, corrosion resistivity, and high melting point [15][16][17]. The lower fracture toughness of bulk BC is overcome by the 1D BC nanostructures having high elastic modulus [18].…”