脉冲爆轰发动机燃烧室壁的传热分析
摘要：对脉冲爆轰发动机燃烧室爆轰管壁建立了一维、二维的传热模型，利用数值计算方法对燃烧室管壁进行了一维和二维数值计算，得到了管壁温度变化规律和管壁的换热特性；采取不同的边界条件或者不同的材料系数进行计算比较，分析它们对脉冲爆轰发动机管壁温度的影响。计算结果表明，管壁的导热系数越大，管壁传热过程越快，管的外壁温度平衡的越快，外界流体与管壁的对流换热系数越大，对管壁的冷却越有利，管壁温度达到平衡状态需要的时间越长；最终外壁面平衡温度随着对流换热系数的增大而降低。通过传热分析可以对脉冲爆轰发动机爆轰管壁采取有效的冷却措施，从而来提升脉冲爆轰发动机的综合性能。65974
毕业论文关键词：脉冲爆轰发动机 传热模型 管壁温度 综合性能 数值计算
Title: Heat transfer analysis of pulse
detonation engine combustion chamber wall
Abstract：
One-dimensional and two-dimensional heat transfer model of pulse detonation engine detonation combustion chamber wall is established， the numerical method is used to calculate the one-dimensional and two-dimensional wall temperature value of each point，then the wall temperature variation curve is drown to analyze temperature changes and heat transfer characteristics of the wall， the temperature of pulse detonation engine wall is calculated under different boundary conditions and different materials. The results show that the greater thermal conductivity of the wall，the faster heat transfer process of the wall is， and faster the outer surface of the wall temperature equilibrium is. The larger the external convective heat transfer coefficient is ， the more beneficial it is for the cooling of the wall ， the longer time the wall temperature equilibrium requires. the equilibrium temperature of the outer wall decreases with the increase of the heat transfer coefficient. According to the results of heat transfer analysis, effective measures can be taken to cool down the wall of detonation tube pulse detonation engine， thereby to improve the pulse detonation engine comprehensive performance.
Keywords pulse detonation engine heat transfer model tube wall temperature comprehensive performance numerical calculation
目录
1 引言 1
1．1 脉冲爆轰发动机的相关研究 2
1.1.2 脉冲爆轰发动燃烧室壁传热相关的研究 3
1.2 爆轰的介绍以及脉冲爆轰发动机燃烧室壁的传热过程 4
2 脉冲爆轰发动机燃烧室管壁的传热模型 6
2.1 一维管壁传热模型 6
2.1.1 一维传热物理模型 6
2.1.2 一维传热数学模型 7
2.2 二维管壁传热模型 7
2.2.1 二维管壁传热物理模型 7
2.2.2 二维管壁传热数学模型 8
3 一维与二维传热数值计算方法 9
3.1一维传热数值计算 9
3.1.1 一维导热非稳态项的离散 10
3.1.2 一维管壁导热方程的显式计算格式与隐式计算格式