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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.142 SNIP: 0.16 CiteScore™: 0.29

ISSN Print: 2150-766X
ISSN Online: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.2019027890
pages 205-216

A NOVEL POLYETHYLENE PARTICLES/PARAFFIN-BASED SELF-DISINTEGRATION FUEL FOR HYBRID ROCKET PROPULSION

Yue Tang
Department of Forensic Science and Technology, Jiangsu Police Institute, Nanjing, Jiangsu, 210031, China
Wei Zhang
School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu, 210094, China
Suhang Chen
School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu, 210094, China
Hongsheng Yu
School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu, 210094, China
Ruiqi Shen
School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu, 210094, China
Luigi T. De Luca
Space Propulsion Laboratory (SPLab), Department of Aerospace Science and Technology, Politecnico di Milano, I-20156 Milan, Italy
Yinghua Ye
School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu, 210094, China

ABSTRACT

Improving the regression rate of fuels is one of the key issues for solid-liquid hybrid rocket propulsion. In this paper, a novel polyethylene particles/paraffin-based self-disintegration composite fuel was designed. The combustion characteristics and combustion flame of fuels were tested under oxygen flow by using a homemade combustion chamber at 1 MPa. The influence of mass fraction and particle size of polyethylene on combustion performance of fuels was obtained and the dependence of regression rates and mass burning rates with the oxidizer mass flux was revealed. The recorded videos showed that numerous burning particles flew out of the burning surface during combustion which was more intense at high oxidizer mass flux; these self-disintegration particles had a promoting effect on the propulsion performance. The regression and mass burning rates increased first and then decreased with the increasing of mass percentage of polyethylene particles. Compared with pure paraffin, the average regression rates of formulations blended with 5% and 10% polyethylene particles were increased by 9.4% and 23.0%, and the self-disintegration of fuel plays a leading role in promoting the regression rate. However, when the addition amount reached 15% and 20%, the average regression rates were reduced by 5.5% and 13.2%, which was due to high melting point and high decomposition temperature of polyethylene. The effect of particle size on the combustion showed that small particles are favorable for increasing the regression rates at high oxidizer mass flux. The regression rates of fuels with three different sizes of polyethylene particles were increased by 21.0%, 11.2%, and –1.6% at 367 kg/(m2·s). Small-size particles have a more pronounced effect on the regression rates owing to dense particle dispersion and violent particle scattering. The results may be of great significance for the development of regression rate fuels.


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