Characterization and manufacturing of a paraffin wax as fuel for hybrid rockets
作者机构：CIRAItalian Aerospace Research CentreCapuaCE 81043Italy
出 版 物：《Propulsion and Power Research》 (推进与动力（英文）)
年 卷 期：2018年第7卷第3期
页 面：218-230页
核心收录：
学科分类：0820[工学-石油与天然气工程] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0827[工学-核科学与技术] 080502[工学-材料学] 0802[工学-机械工程] 0703[理学-化学] 0825[工学-航空宇航科学与技术] 0801[工学-力学（可授工学、理学学位）] 0823[工学-交通运输工程]
基 金：Italian Ministry of University and Research Ministero dell’Istruzione, dell’Università e della Ricerca, MIUR
主 题：Paraffin wax Hybrid rockets Manufacturing SASOLs 0907 Regression rate
摘 要：The hybrid propulsion performed with paraffin waxes exhibits most attractive capabilities compared to solid or liquid engines,e.g.,throttleability and re-ignition,alongside higher regression rates compared to the conventional hydroxyl terminated polybutadiene(HTPB)hybrid *** is because the paraffin wax forms a thin and hydro-dynamically unstable liquid layer,and then enhances the regression rate with the entrainment of droplets from the liquid-gas ***,some critical open points on the manufacturing of the paraffin fuel grains still persist,because the paraffin wax exhibits high shrinkage during the solidification phase,leading to the formation of cavities,cracks and internal rips,which may be detrimental to the mechanical properties and the structural integrity of the fuel *** this context,this paper deals with a wide calorimetric,thermo-mechanical and physical characterization of the paraffin wax selected to manufacture the hybrid rocket engines(HRE)fuel grain,in order to gain a thorough knowledge of the material necessary to avoid the formation of critical *** manufacturing methods were investigated,and it was found that only laboratory scale processes,based on the use of a heated circular mould-piston apparatus,are able to avoid the formation of critical defects,with the application of both high temperature and pressure.
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