聚龙一号上磁驱动铝飞片发射实验的数值分析与再设计

阚明先; 杨龙; 段书超; 王刚华; 肖波; 张朝辉; 王贵林

doi:10.11883/1001-1455(2017)05-0793-06

聚龙一号上磁驱动铝飞片发射实验的数值分析与再设计

doi: 10.11883/1001-1455(2017)05-0793-06

中国工程物理研究院流体物理研究所，四川绵阳 621999

基金项目:

国家自然科学基金项目 11405167

国家自然科学基金项目 11571293

中国工程物理研究院科学技术发展基金项目 2015B0201023

详细信息

作者简介:
阚明先(1971—)，男，硕士，副研究员，kanmx@caep.cn

中图分类号: O361.3
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出版历程
- 收稿日期: 2016-01-29
- 修回日期: 2016-05-17
- 刊出日期: 2017-09-25

Numerical analysis and redesign of magnetically driven aluminum flyer plateon PTS accelerator

Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China

摘要

摘要: 聚龙一号上PTS-151发次实验中，磁驱动加速370 μm厚飞片测得的最大速度为18 km/s，磁驱动加速482 μm厚飞片测得的最大速度为19 km/s。采用MDSC2程序, 对PTS-151发次实验进行了数值分析，结果表明：PTS-151发次实验中测量的最大速度的含义不同于以往文献中飞片的最大速度。以往文献中发射飞片在测试过程中自由面未被烧蚀，测试的最大速度为飞片自由面速度；PTS-151发次实验中两个飞片在测量过程中自由面被烧蚀，实验测量的最大速度为飞片被完全烧蚀前的一瞬间飞片内部最后一个固体面的速度。在飞片自由面未被烧蚀之前，370 μm厚飞片的计算最大自由面速度仅为7 km/s，482 μm厚飞片的计算最大自由面速度仅为11.8 km/s，远低于测量值。对PTS-151发次实验条件下飞片尺寸进行了再设计，飞片厚度为680 μm时最优，既能保证自由面未烧蚀，又使得飞片的速度最大，达到17.5 km/s。
- 龙一号装置 /
- 磁驱动飞片 /
- 二维磁驱动数值模拟程序 /
- 固体反射面 /
- 自由面速度
Abstract: In the shot PTS-151 experiments the maximum velocity measured on the magnetically driven aluminum flyer plate with a thickness of 370 μm was 18 km/s, while that with a thickness 482 μm was 19 km/s. In this work, the data from the shot PTS-151 experiments on PTS were simulated and analyzed using the two dimensional magneto-hydro dynamics code MDSC2. The numerical simulation shows that the meaning of the maximum velocity measured in the shot PTS-151 should be different from that of the maximum velocity as reported in the related literatures where, as the free surface of the flyer plate was not ablated during the experiment, the maximum velocity measured was the flyer plate's free surface velocity. In the shot PTS-151 experiments the free surface was ablated in the measurement of the two flyer plates, and therefore the maximum velocity measured by VISAR was the velocity of the last solid surface inside them just before they were totally ablated. In our simulation, if the initial free surface is not ablated, the maximum initial free surface velocity calculated is 7 km/s with the 370 μm thick flyer plate and 11.8 km/s with the 482 μm thick flyer plate, far below the velocity actually measured in the shot PTS-151 experiments. A new flyer plate was re-designed on the basis of the current condition of the shot PTS-151, with 680 μm as the optimal thickness, which would both prevent the free surface from ablation and achieve the maximum velocity of 17.5 km/s.
- PTS accelerator /
- magnetically driven flyer plate /
- two dimensional magnetically driven simulation code /
- solid reflecting surface /
- free surface velocity

HTML全文

图 1 PTS-151发次磁驱动发射飞片结构图

Figure 1. Cross section of 3D flyer configurationfor PTS-151 experiment

下载: 全尺寸图片幻灯片

图 2 PTS-151发次实验电流

Figure 2. Current for PTS-151 experiment

下载: 全尺寸图片幻灯片

图 3 PTS-151发次实验370 μm厚飞片速度

Figure 3. Free surface velocities of 370 μm flyer platesfor PTS-151 experiment

下载: 全尺寸图片幻灯片

图 4 410ns时370 μm厚飞片密度分布

Figure 4. Density distribution of 370 μm flyer at 410 ns

下载: 全尺寸图片幻灯片

图 5 PTS-151发次实验482 μm厚飞片速度

Figure 5. Free surface velocities of 482 μm flyer platesfor PTS-151 experiment

下载: 全尺寸图片幻灯片

图 6 470 ns时482 μm厚飞片密度分布

Figure 6. Density distribution of 482 μm flyer at 470 ns

下载: 全尺寸图片幻灯片

图 7 Z2434发次实验飞片速度

Figure 7. Free surface velocitiesof 2.004 mm flyer platesfor Z2434 experiment

下载: 全尺寸图片幻灯片

图 8 Z2434实验3 200 ns时铝飞片密度分布

Figure 8. Density distribution of 2.004 mm flyer platesfor Z2434 experiment at 3 200 ns

下载: 全尺寸图片幻灯片

表 1 不同厚度未烧蚀固体自由面的最大速度

Table 1. Maximum velocities of solid free-surface offlyer plates with different thickness

h/μm	k	t_f/ns	v_f/(km·s^-1)
370	0.570	340	7
482	0.595	389	11.8
530	0.606	412	13.8
570	0.615	430	15.4
630	0.628	460	16.9
680	0.640	480	17.5
770	0.659	-	16.3
870	0.682	-	15.5

下载: 导出CSV

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