粉末燃料冲压发动机理论性能分析

申慧君; 夏智勋; 胡建新; 缪万波

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粉末燃料冲压发动机理论性能分析
申慧君¹, 夏智勋², 胡建新³, 缪万波⁴
1.防科学技术大学航天与材料工程学院湖南长沙410073;2.防科学技术大学航天与材料工程学院湖南长沙410074;3.防科学技术大学航天与材料工程学院湖南长沙410075;4.防科学技术大学航天与材料工程学院湖南长沙410076

摘要:

研究粉末燃料冲压发动机的理论性能,采用编制的热力计算软件,分别对以硼粉、铝粉、镁粉为燃料的发动机性能进行了计算,分析了不同参数对发动机比冲的影响趋势,为进一步研究及发动机设计奠定了基础。通过与常规液体燃料冲压发动机及固体火箭冲压发动机进行比较,说明了粉末燃料冲压发动机在比冲及体积比冲方面的优势。鉴于金属粉末燃烧产物中凝相物质含量高的特点,研究了两相流损失对发动机性能的影响。

关键词: 粉末燃料冲压发动机+ 热力计算+ 比冲体积比冲+ 二相流

DOI：

分类号:V237

基金项目:

Theoretical performance analysis of the powdered fuel ramjet

SHEN Hui-jun¹, XIA Zhi-xun², HU Jian-xin³, MIAO Wan-bo⁴

1.Inst.of Aerospace and Material Engineering,National Univ.of Defence Technology,Changsha 410073,China;2.Inst.of Aerospace and Material Engineering,National Univ.of Defence Technology,Changsha 410074,China;3.Inst.of Aerospace and Material Engineering,National Univ.of Defence Technology,Changsha 410075,China;4.Inst.of Aerospace and Material Engineering,National Univ.of Defence Technology,Changsha 410076,China

Abstract:

To investigate the performance of powered fuel ramjet the performances of several ramjets were calculated.Effects of fuel,air/fuel ratio,pressure of combustion chamber,Mach number and flight height on specific impulse of engine were analyzed.By comparing powdered fuel ramjet to conventional ducted rocket and liquid fuel ramjet,it was found that powdered fuel ramjet can exceed liquid fuel ramjet in volumetric specific impulse and exceed ducted rocket on specific impulse and volumetric specific impulse.In addition,the influence of two phase losses on performance of engine was discussed.

Key words: Powdered fuel ramjet+ Thermodynamic calculation+ Specific impulse Volumetric specific impulse+ Twophase flow