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      Lithium-Perchlorate/Polyvinyl-Alcohol-Based Aluminized Solid Propellants with Adjustable Burning Rate

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          Abstract

          Electrically controlled solid propellants (ECSPs) provide a completely new approach to tailor solid propellant burning rates, and an extensive range of low-hazard hydroxylamine nitrate (HAN)-based ECSPs have been developed. However, the low thermal stability and poor electrical control properties of HAN-based ECSPs limit its application. In this paper, lithium-perchlorate/polyvinyl-alcohol (PVA)-based aluminized ECSPs are prepared, and the effects of materials on the curing process and the theoretical specific impulse of the propellant are investigated. The thermal decomposition and burning characteristics were also investigated. The ratio of lithium perchlorate ( LiClO 4 )/PVA/water ( H 2 O ) to the molecular weight of PVA is important to the curing characteristic of lithium-perchlorate/PVA-based aluminized propellants. In addition, the degree of alcoholysis of the PVA polymer affects the curing time of the LiClO 4 / PVA / H 2 O system. According to the results calculated using the NASA Chemical Equilibrium with Applications program, the contents of the oxidizer, aluminum, and water in the composition of lithium-perchlorate/PVA-based aluminized propellant can effectively regulate the properties of the propellant. During thermal decomposition, this propellant is more thermally stable than the HAN / PVA / aluminum / H 2 O -based electrically controlled propellant. The burning rates of lithium-perchlorate/PVA-based aluminized propellants at a voltage ranging from 80 to 400 V dc and pressure from 0.1 to 5.0 MPa were investigated. The results showed that the burning rate changes as a function of voltage input and pressure. The burning characteristics of the propellants can be regulated in real time by changing the electric power input.

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          The effects of hydrogen bonding upon the viscosity of aqueous poly(vinyl alcohol) solutions

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            Aluminum agglomeration reduction in a composite propellant using tailored Al/PTFE particles

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              The effect of electric fields on the burning velocity of various flames

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                Author and article information

                Journal
                jpp
                Journal of Propulsion and Power
                J. Propulsion
                American Institute of Aeronautics and Astronautics
                0748-4658
                1533-3876
                28 February 2019
                May–June 2019
                : 35
                : 3
                : 512-519
                Affiliations
                National University of Defense Technology , 410073 Changsha, People’s Republic of China
                Chongqing University , 400044 Chongqing, People’s Republic of China
                National University of Defense Technology , 410073 Changsha, People’s Republic of China
                Author notes
                [*]

                Graduate Student, College of Aerospace Science and Engineering.

                [†]

                Professor, Science and Technology on Scramjet Laboratory.

                [‡]

                Professor, College of Aerospace Engineering.

                Article
                B37279 B37279
                10.2514/1.B37279
                3d37b842-c85c-4d64-8fb6-ca2c54553cae
                Copyright © 2019 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved. All requests for copying and permission to reprint should be submitted to CCC at www.copyright.com; employ the eISSN 1533-3876 to initiate your request. See also AIAA Rights and Permissions www.aiaa.org/randp.
                History
                : 8 July 2018
                : 16 November 2018
                : 20 January 2019
                Page count
                Figures: 12, Tables: 5
                Categories
                Full-Length Papers

                Engineering,Physics,Mechanical engineering,Space Physics
                Engineering, Physics, Mechanical engineering, Space Physics

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