大口径尾翼稳定固体燃料冲压增程榴弹设计与仿真
时间:2020-05-15 20:41 来源:毕业论文 作者:毕业论文 点击:次
摘要近年来,固体燃料冲压发动机(Solid Fuel Ramjet,简称SFRJ)以其比冲高,结构简单,成本低等优点越来越受到各国的关注,这些优点也使得它成为炮弹增程的理想选择。本文主要根据 SFRJ 的特性,设计一款尾翼稳定固体燃料冲压增程榴弹,并结合进气道工作特性对其结构进行设计。 利用 Fluent 流体仿真软件,在定常流的假设条件下对 130mm 尾翼稳定固体燃料冲压增程榴弹的进气道-战斗部-燃烧室-喷管统一流场进行了数值仿真,得到了其在稳定工作时的流场。其次,通过改变喷管喉径大小及台阶高度分析了其冷流下流场参数、再附点的位置的变化规律。 在含化学反应条件下,对统一流场进行了仿真,得到了燃烧室各项参数及各组分分布。研究了在变台阶高度的情况下,各项参数的变化及各组分分布变化规律。48922 毕业论文关键词 尾翼稳定 冲压增程 结构 进气道 再附点 Title Design and Simulation of Large Diameter Fin-Stabilized Solid Fuel Ramjet Assisted Projectile Abstract In recent years, Solid Fuel Ramjet(SFRJ) is more and more concerned by many countries for its advantage of high specific impulse, simple structure, low cost and so on. These advantages also make it an ideal choice to extend range of projectile. This paper mainly according to the characteristics of the SFRJ, design a fin stabilized solid fuel ramjet assisted projectile, and design the structure combining with characteristics of the inlet. Using FLUENT flow field simulation software, under the assumption of steady flow ,the 130mm Fin-stabilized solid fuel ramjet assisted projectile inlet – payload - combustion chamber – nozzle unified flow field is simulated, the flow field at steady condition is obtained. Secondly, by changing the nozzle size and step height and analyzed the reattachment point location flow parameters. Under the condition of chemical reaction, the flow field is simulated, and the parameters of combustion chamber and the distribution of each component were obtained. The variation of various parameters and the distribution of different components in the case of variable step height are studied. Keywords fin-stabilize SFRJ assisted structure inlet reattachment point 目录 1绪论....1 1.1研究的背景与意义1 1.2冲压发动机的类型及特点....1 1.4关键技术....5 1.5本文主要研究内容及章节安排...6 2冲压增程弹丸型面及结构设计7 2.1型面设计....7 2.1.1进气道设计.7 2.1.2燃烧室设计....11 2.1.3喷管设计12 2.1.4设计成果14 2.2结构设计..14 2.2.1主要结构划分及弹丸参数14 2.2.2各个部件及总装图....14 2.2.3小结...17 3.1固冲发动机内流场简化假设18 3.2计算网格..18 3.3数值计算方法....20 3.3.1求解方法20 3.3.2边界条件21 3.4仿真模型..21 4冷流条件下仿真结果与分析..23 4.1波系结构23 4.1.1内外流场云图..23 4.1.2流场品质分析..24 4.2...25 4.2.1理论分析25 4.2.2仿真结果分析..27 4.3小结28 5含化学反应内流场仿真结果与分析29 5.1流场特征分析....29 5.1.1流场结构29 5.1.2燃烧室内各组分分布规律及分析30 5.2变燃面条件下内流场仿真....32 5.2.1燃料质量流率..32 5.2.2变台阶高度下仿真结果与分析....33 5.3小结35 结论...36 致谢...37
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