爆震管喷管流动数值研究

Numerical simulation of nozzle flow on detonation duct

关键词:  爆震管  喷管  数值仿真

Key words:  Detonation duct  Nozzle  Numerical simulation

摘要:

为了获得高性能的爆震管,应用时空守恒元和解元(CE/SE)法对带不同形式喷管的爆震管进行二维轴对称数值模拟,分析复杂的爆震波流场,研究喷管对爆震管性能的影响。结果表明,爆震管的推进性能的提高受喷管的长度、夹角和形状的影响,其中长喷管性能优于短喷管,收敛扩张喷管性能优于收敛喷管,钟形喷管性能优于扩张喷管。

Abstract:

In order to obtain the detonation duct of high performance,a space-time conservation element and solution element method(CE/SE) was used to simulate the formation and propagation process of two-dimensional axisymmetric detonation in duct with vairous nozzle,and analyze the complicated flow field,and studied the effect of nozzles on the duct.Results showed that the duct performance was effected by the length,angle and sharp of nozzle.The performance of long nozzle was better than that of the short one.The performance of convergent-divergent nozzle was better than that of convergent nozzle.The performace of bell nozzle was better than that of divergent nozzle.