文献类型：期刊文献

英文题名：The Effects of Nano-Carbon Powder on Properties of High Concentration Aluminum-Containing Gel Propellant System

作者：Chen, Jiyuan[1]; Zhao, Hui[1]; Li, Weifeng[1]; Liu, Haifeng[1]; Yao, Feng[2]; Wang, Zhichao[1]; Chen, Hongyu[2]; Shi, Zhehang[2]; Liu, Changguo[3]

机构：[1] National Energy Coal Gasification Technology Research and Development Center, Shanghai Engineering Research Center of Coal Gasification, Engineering Research Center of Resource Utilization of Carbon-containing Waste With Carbon Neutrality, Ministry of Education, East China University of Science and Technology, Shanghai, 200237, China; [2] Shanghai Institute of Space Propulsion, Shanghai, 201112, China; [3] Harbin Institute of Technology, China

年份：2024

外文期刊名：SSRN

收录：EI(收录号：20240118928)

语种：英文

外文关键词：Alumina - Aluminum oxide - Aluminum powder metallurgy - Carbon dioxide - Combustion - Energy efficiency - Explosives - Shear flow - Shear thinning

摘要：By incorporating aluminum particles into the gel propellant, it is possible to enhance its energy density, elevate the combustion temperature, and facilitate rapid combustion of the propellant. However, the aluminum particles in the gel propellant will agglomerate during the combustion process, resulting in severe incomplete combustion. In addition, the higher concentration of aluminum particles also increases the viscosity of the gel, making it difficult to atomize the gel, thereby affecting the subsequent combustion process. The practical application of high-concentration aluminum-containing gel propellants is challenged by the aforementioned problems. In our research, we added nano-carbon powder into the high-concentration aluminum-containing gel formula. By studying the impact of nano-carbon powder on various properties of the gel, we analyzed its feasibility in solving the above problems. Through experimental research, we found that adding 10 wt% nanocarbon powder to the gel system can increase the volumetric heat of combustion of the gel propellant by 21.21%. This is because large aluminum agglomerates break down due to the carbon dioxide produced by nano-carbon powder combustion. At the same time, fluffy γ-Al2O3 is produced in the gel combustion products, so that the unreacted aluminum can be in full contact with the external oxidant, thus reducing the incomplete combustion of aluminum-containing gels. The rheological experiments demonstrate that after adding nano-carbon powder, the viscosity of the gel system will increase at a low external shear rate, which is beneficial to the ability to resist external interference in the process of gel storage. However, at a high shear rate, the addition of nano-carbon powder enhanced the shear-thinning properties of the gel, thus reducing the viscosity of the system and making the gel easier to atomize. In summary, the addition of nanocarbon powder can improve the storage, atomization, and combustion processes of gel, resulting in the better practical performance of high-concentration metalized gel propellants. ? 2024, The Authors. All rights reserved.