Combustion Characteristics of Paraffin-Polyethylene Blends Fuel for Solid Fuel Ramjet
Publication: Journal of Aerospace Engineering
Volume 33, Issue 4
Abstract
In this paper, a series of firing tests have been conducted via a connected pipe facility to investigate the influences of the paraffin blends fuel on combustion characteristics of solid-fuel ramjet engines. A three-dimensional (3D) scanner and scanning electron microscope (SEM) have been used to obtain the local regression rate and the morphology of the solid fuel after combustion, respectively. The results indicate that decreasing the inlet diameter increases the performance of a solid fuel ramjet (SFRJ), and increasing the paraffin concentration and decreasing the port diameter of the solid fuel can enhance the average regression rate but have negative effects on the performance. The SEM results indicate that increasing paraffin concentration can lead to the reduction of the size and quantity of the carbon particles attached and agglomerated at the fuel surface and also has a significant effect on the morphology of the fuel surface, such as the roughness and the separation between paraffin and high-density polyethylene for blended fuel.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available from the corresponding author by request (the reconstruction code written in MATLAB to obtain the 3D distribution of the regression rate).
Acknowledgments
The authors would like to thank the Six Talent Peaks Project of Jiangsu Province of China, No. 2016-HKHT-017, for their support.
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Published In
Journal of Aerospace Engineering
Volume 33 • Issue 4 • July 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Aug 26, 2019
Accepted: Feb 5, 2020
Published online: May 14, 2020
Published in print: Jul 1, 2020
Discussion open until: Oct 14, 2020
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