进气道与弹体内外流场一体化数值模拟方法研究

Study on Integrated Numerical Simulation of Inlet-body Internal and External Flow Fields

建立了进气道/导弹内外流场的CFD数值模型,并对某固冲导弹的纵向特性进行了实例计算分析。结果显示,数值计算不仅可以直接提取进气道的内流特性,而且可以直接提取进气道和导弹全弹的外流气动特性。对于评估进气道与导弹弹体相互之间的气动干扰特性,也能提供直接的数值依据。该方法简便易行,可望推广应用于固冲等吸气式导弹的总体方案设计中,具有明显的实用价值。

The integrated CFD numerical model of inlet and body was established and the longitudinal charac- ters were calculated for a certain solid propellant rocket ramjet engine missile. The results show that it can be ob- tained not only internal flow characteristics of inlet but also external flow characteristics of inlet and missile directly through numerical simulation. Also, the data of body-inlet flow field interference can be gained directly too. This method is simple and feasible, and can be generalized to project design of air-breathing missile such as solid pro- pellant rocket ramjet engine missile, and has obvious practical importance.