TANG Qiao-zhen,FENG Yu-jiao,QIN Dong-lei,et al.Numerical Modeling of Chaff Cloud Explosive Trajectory in the Upper Air Condition and Weather Analysis[J].Journal of Chengdu University of Information Technology,2018,(05):579-584.[doi:10.16836/j.cnki.jcuit.2018.05.016]
箔条云高空爆炸成形特性数值计算及气象分析
- Title:
- Numerical Modeling of Chaff Cloud Explosive Trajectory in the Upper Air Condition and Weather Analysis
- 文章编号:
- 2096-1618(2018)05-0579-06
- Keywords:
- meteorological effects; chaff clouds; explosion; distribution radius; information technology; numerical modeling
- 分类号:
- P426.5
- 文献标志码:
- A
- 摘要:
- 针对高空下箔条云成形特性问题,根据箔条爆炸过程中分散特征和运动特征,分别建立了箔条散开模型和运动模型; 计算了地面和10 km高空中空气的密度、温度和黏度,分析了箔条云在高空与气象因素之间的关系,表明箔条云高空爆炸的速度、距离方向和效果等均受高空雷电、大风、强降水等影响,作业前及时掌握地面及高空气象资料、天气预报、雷达图等尤为重要; 基于此,采用了计算流体力学方法,计算了地面静爆条件下箔条云的爆炸成形特性,并与试验数据进行比较,验证了模型的合理性; 随后计算了10 km高空下箔条云的散开特性,研究表明10 km下箔条散开时间变化不大、布放半径大幅增加; 最后研究了不同箔条布放初速的影响,结果表明初速对箔条布放半径影响不大。
- Abstract:
- To study the formation character of chaff cloud, the dispersion and motion models of chaff were established based on their characters, respectively; the density, temperature and viscosity of air in the ground and 10 km overhead are calculated, and the effects of meteorological elements on the chaff cloud explosion are analyzed. Based on these results, firstly, the formation characters of the chaff cloud on the ground were studied using the CFD method, and the results were compared with the experimental results, which verified the accuracy of the method; secondly, the formation characters at the altitude of 10 km was studied in detail, which showed that the distribution time changed little while the distribution radius greatly increased in the upper air; finally, the influence of initial speed was studied and found it has little effect on the distribution radius of chaff cloud.
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备注/Memo
收稿日期:2018-04-13 基金项目:湖北省气象局科技发展基金资助项目(2017C02 )