| 李福松*,马旭辉,徐敏,刘增辉.某火箭弹标准外形引信气动加热计算[J].实验力学,2008,23(3):199~205 |
| 某火箭弹标准外形引信气动加热计算 |
| Aeroheating Computation of a Standard Rocket Fuze |
| 投稿时间：2007-06-15 修订日期：2008-05-12 |
| DOI： |
| 中文关键词: 气动加热 非定常计算 引信 CFD |
| 英文关键词:aeroheating unsteady flow computation fuze Computational Fluid Dynamics |
| 基金项目: |
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| 摘要点击次数: 248 |
| 全文下载次数: 254 |
| 中文摘要: |
| 为了评估弹体飞行中产生的气动热对弹头引信的影响，采用计算流体动力学（CFD）方法对某火箭弹标准外形引信体在飞行条件下的气动加热过程进行了数值计算与分析。计算中，将获得的某火箭弹实际弹道参数进行了分段线性拟合，得到了计算域入口处的速度、温度、压强与时间的函数关系；结合分析对象的特点，采用结构化网格、远场压力边界条件、k-ε模型，利用有限体积法、耦合求解法模式、二阶迎风格式进行求解，得出了某火箭弹标准外形引信在弹道中不同时刻的温度场变化规律。计算结果与遥测试验结果的比较表明：两者变化的趋势及量值大小相吻合，两者的最大误差为13.0%，满足工程应用要求。 |
| 英文摘要: |
| In order to evaluate the areoheating effect on a standard warhead fuze produced by shockwave in its flight, CFD (Computational Fluid Dynamics)method is employed. The variation of velocity, temperature and pressure along with the time at the calculation inlet zone was obtaied by piece-wise linearizationed the actual rocket ballistic parameter. Considering the features of analysis model, the structured mesh,far-field boundary conditions, k-ε turbulent model,Finite Volume Method,coupled solver and the second order upwind method were adopted in the calculation.The temperature vs time curve of a standard rocket fuze was obtained in the whole ballistic process. The comparison between telemetering data and calculation results shows that both change tendency and quantity are approximately coincident and the maximum error between them is 13.0%, which satisfies the engineering application requirment. |
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