| 底部形状对钝锥体模型气动与电磁散射性能的影响 |
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| 引用本文： | 于哲峰,黄谦,张志成,梁世昌,简和祥.底部形状对钝锥体模型气动与电磁散射性能的影响[J].实验流体力学,2009,23(2). |
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| 作者姓名： | 于哲峰 黄谦 张志成 梁世昌 简和祥 |
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| 作者单位： | 中国空气动力研究与发展中心,四川,绵阳,621000 |
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| 摘 要： | 开展了飞行器气动与隐身综合特性数值研究.分别利用时域有限差分法和数值求解N-S方程的方法对飞行器的电磁散射与气动特性进行了数值模拟,研究了钝锥体模型底部形状对其雷达散射截面(RCS)和零升阻力的影响.由数值计算结果可知:合理地改变钝锥体模型底部形状,可以降低模型的RCS.并且,随着椭球体轴的长度或锥体高度的增加,模型的RCS逐渐减小.当飞行马赫数为5.0,高度为20kin时,底部形状为椭球体或锥体的模型,随着椭球体轴的长度或锥体高度的增加,模型的零升阻力略有下降.
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| 关 键 词： | 电磁散射 气动性能 时域有限差分法 N-S方程 钝锥体模型 |
Effect of the blunt-cone model's bottom shape on its aerodynamics/scattering performance |
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| YU Zhe-feng,HUANG Qian,ZHANG Zhi-cheng,LIANG Shi-chang,JIAN He-xiang.Effect of the blunt-cone model''s bottom shape on its aerodynamics/scattering performance[J].Experiments and Measur in Fluid Mechanics,2009,23(2). |
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| Authors: | YU Zhe-feng HUANG Qian ZHANG Zhi-cheng LIANG Shi-chang JIAN He-xiang |
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| Institution: | China Aerodynamics Research & Development Center;Mianyang Sichuan 62100;China |
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| Abstract: | The vehicle's aerodynamics and scattering performance were researched by numerical solving the N-S equations method and finite difference time domain method(FDTD) respectively.The corresponding programs were compiled.By these programs,the effect of a scaling blunt-cone model's bottom shape on its aerodynamics/electromagnetic was researched.Ellipsoidal bottom and pyramidal bottom were used to change the model's aerodynamics and scattering performance.The numerical results showed that the monostatic RCS of th... |
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