Attenuation Performance Of Pyrotechnic To The IR Signal Of HTPB Composite Propellant

In this paper, the radiant mechanism of pyrotechnic and the IR mechanism of HTPB composite propellant are analyzed systematically. Discussing the technical approaches about reducing the IR signal of HTPB composite propellant and the role of elements played in the process of burning. According to the above theories, using the external ring of pyrotechnic-technology and the single factor analysis, which design pyrotechnic agents to achieve the purpose of reducing the IR signal of HTPB composite propellant without affecting the burning platform.In this process, using IR intensity and spectral radiance characterized IR signal. By analyzing the results of experiments, the essential composition has been designed:KNO3 is oxidant. S is combustible agent and phenolic resin is adhesive. The results showed that choosing NaHCO3 and ferrocene as additives respectively in pyrotechnic compositions can reduce the IR signal of HTPB composite propellant significantly. Different content of ferrocene has significant difference in reducing the IR signal of HTPB composite propellant. When the connect of ferrocene is 55% in pyrotechnic agent, the maximum IR signal of HTPB propellant can be attenuated by 60%, but the IR signal of HTPB composite propellant within 2500-3333cm-1 has also been increased.When the connect of ferrocene is 45% in pyrotechnic agent, the maximum IR signal of HTPB propellant can be attenuated by 55%, and no effect on the IR signal of HTPB composite propellant within 2500-3333cm-1 band.In this paper, the performance of the better pyrotechnic agents can be evaluated synthetically by characterizing ultraviolet radiation, combustion temperature, combustion rate, security and reliability.