摘要以整装式液体发射药火炮的内弹道过程为背景，探索影响液体药不稳定燃烧的因素，旨在寻找一种能够改善这种不稳定现状的方法，来突破液体炮发展的瓶颈。采用三级阶梯渐扩燃烧室，利用高速录像机记录射流扩展形态的照片，分析Taylor空腔的发展历程。构建二维轴对称两相流模型，模拟实验工况下的射流扩展，更深入地探讨多参数变化是如何影响整装式含能液体扩展过程中气液相互作用的。通过改变喷射压力或喷孔直径，寻找喷射条件与稳定燃烧的匹配关系。研究表明，数值模拟与实验结果吻合较好，阶梯渐扩燃烧室确实能有效减缓燃烧的不稳定性，而增大燃气喷射压力，会使燃烧的不稳定性加剧，增大喷孔直径，也会使燃烧更不稳定。82537

毕业论文关键词  整装液体炮  稳定性  射流  Taylor空腔  数值模拟

毕业设计说明书外文摘要

Title  Studies on the interaction about single stranded gas jet with bluk loaded liquid propellant gun               

Abstract Studies based on the interior ballistic process of bulk loaded liquid propellant gun , and explore the influence of the liquid propellant combustion instability factors, so as to find out a method to improve the unstable situation to break through the liquid gun development bottleneck。  The three steps of gradually expanding the combustion chamber, extended forms of photos by using high speed video recording the jet, analysis the development of the Taylor cavity。 To construct a two-dimensional axisymmetric two-phase flow model, the simulation experiment under the condition of jet expansion and further explore multiparameter is how to influence the self-contained bearing liquid expansion in the process of gas-liquid interaction。 By changing the injection pressure or the orifice diameter, the matching relationship between the injection condition and the stable combustion is sought。 Studies have shown that numerical simulation are in good agreement with the experimental results and step diffuser combustor can really effectively slow down the combustion instability, and increasing the fuel injection pressure can increase the combustion instability, increasing the diameter of the nozzle hole, also can make the combustion more unstable。

Keywords  bulk loaded liquid propellant gun  stability  jet 

          Taylor cavity  numerical simulation

目   次

1 绪论 1

1。1 研究背景和意义 1

1。2 国外发展历程 2

1。3 国内外研究现状 3

1。4 本文的主要工作 4

2 燃气射流与液体工质相互作用的实验研究 6

2。1 引言 6

2。2 实验装置及原理 6

2。3 实验结果与分析 7

3 燃气射流与液体工质相互作用的数值模拟 10

3。1 引言 10

3。2 物理模型 10

3。3 数学模型 11

3。3。1 守恒方程 11

3。3。2 湍流模型 13

3。4 数值模拟结果与分析 14

4 多参数变化对气液相互作用的影响