摘要固液混合推进技术具有高安全性，低成本和可调节性等优点，这些优点使得固液混合推进成为一般亚轨道飞行和太空探索任务一种很有吸引力的动力方式， 但是该技术的应用和发展却受到燃料退移速率低的制约。石蜡基燃料具有高退移速率，其退移速率是相同实验条件下HTPB 燃料的 3～4 倍，同时石蜡基燃料具有比冲高，加工、存放、运输容易等性质，是固液混合发动机的理想能源，但是石蜡力学性能差，易发生脆裂变形，因此应该在保证其燃烧性能的同时尽可能改善其力学性能。本课题设计的含添加剂-石蜡基复合燃料，实现了更大程度地提高燃料退移速率，并且增强了石蜡基燃料的力学性能。本研究开展了含添加剂-石蜡基复合燃料的力学性能和燃烧性能研究，初步掌握含添加剂-石蜡基复合燃料燃烧特性。研究结果表明燃料的退移速率和氧化剂质量密流二者满足幂函数，添加的聚合物添加剂的比例越高退移速率越小， 同时聚合物添加剂的比例越大对石蜡燃料的力学性能的改变越大，为含添加剂-石蜡基复合燃料在混合推进的应用提供了理论参考。42442
毕业论文关键词 固液混合推进 退移速率 高速摄影法 力学性能 含添加剂-石蜡基复合燃料燃烧性能
Title：Study on Mechanical modified paraffin-based fuels and combustioncharacteristics
Abstract:Hybrid rocket engine becomes a very attractive way of the general suborbital flight and spaceexploration mission, because of its high security nature, low-cost, adjustable and otherproperties, but its development and application has been restricted by low regression rate.Paraffin-based fuel has high regression rate, its regression rate is 3～4 times the HTPB fuelunder the same experimental conditions, at the same time, paraffin-based fuel has lowrequirements for storage and transport which made it become the ideal energy of hybrid engine,but the wax is poor of mechanical properties and is prone to brittle deformation, thus we shouldensure the combustion performance at the same time to improve the mechanical properties asmuch as possible. The new type of additive - paraffin-based composite fuel designed in theresearch, realized a greater degree of increasing fuel retreat rate, and enhanced its mechanicalproperties. This research was carried out to study the mechanical and combustion properties ofadditive-paraffin-based composite fuel, preliminary master its combustion characteristics. Theresults show that the regression rate and the oxidizer mass flow both to meet the power function,the higher the mass fraction of the polymer particles or the bigger the particle size , the higherregression rate, provided the theoretical reference of its application in hybrid propulsion.
Keywords: hybrid propulsion technology; regression rate; high speed photography method;mechanical properties; additive-paraffin-based; combustion performance
目次
1引言1
1.1研究背景和意义1
1.2.1混合推进技术的研究进展2
1.2.2改善石蜡力学性能的方法2
1.2.3含添加剂石蜡力学性能测试方法4
1.2.4固体燃料燃面退移速率的测试方法5
1.3本文主要研究的内容6
2实验装置及数据处理方法7
2.1力学性能测试实验7
2.1.1抗压实验装置7
2.1.2拉伸实验装置8
2.1.3力学性能测试实验方法8
2.2燃烧性能测试实验10
2.2.1燃烧实验装置10
2.2.2燃烧性能测试实验方法13
2.2.3数据处理方法15
3配方设计与推进剂制备工艺18
3.1基本成分18
3.2含添加剂石蜡基复合燃料实验室制备18
3.2.1力学性能样品制备19
3.2.2燃烧性能药柱制备23
4石蜡基复合燃料的力学性能测试实验24 石蜡基燃料的力学改性及其燃烧特性研究:http://www.youerw.com/huaxue/lunwen_42873.html