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黄道面内行星际激波相互碰撞作用过程研究—间距效应
Alternative TitleMHD SIMULATION OF INTERACTIONS BETWEEN TWO NEIGHBORING INTERPLANETARY SHOCK WAVES-ANGULAR EFFECTS
吕建永; 魏奉思; 顾惠成; 北京8701信箱
Department空间天气学国家重点实验室
Source Publication空间科学学报
1993
Volume13Issue:2Pages:90-97
ISSN0254-6124
Language中文
Keyword行星际激波 Mhd数值模拟 激波汇合
Abstract本文用两维半MHD数值模型,模拟研究了不同间距的两扰动源所产生的激波在行星际空间黄道面内的相互碰撞过程。在内边界(18R_s),两扰动中心的间距取为24°、36°、48°、54°、72°、120°,模拟了两激波速度均为1000km/s和2000km/s两种情形。结果表明:1.速度为1000km/s的两中等激波,相距24°时,在1AU以内强烈相互作用而汇合成一新激波;相距36°时,在1AU附近发生汇合,但尚可分辨;相距48°时,在1AU以内有相互作用,但可近似认为是独立传播的;相距72°时,将独立向前传播。2.速眨为2000km/s的两强激波,相距≤48°时,将强烈汇合成一新激波;相距54°时,在1AU附近产生汇合,但尚可分辨;相距72°时,相互作用不足以汇合成新的激波;相距120°时,其传播相互独立地进行。并给出了上述情形下两激波汇合的时间和位置,详细比较了汇合激波与相同能量的单激波的等离子体特性。
Other AbstractThe MHD 2 - D, time-dependent model is used to investigate neighboringinterplanetary shock wave interactions in the equatorial plane, with different angular separations. For tow shocks with initial velocity vs = 1000 km/s, the main results are: For the case of angular separation Δφ=24°, the two shock waves completely coalesced into a new shock within 1 AU; For the case of Δφ = 36°, the two shock waves coalesced into a new shock wave near 1AU; For the case of Δφ= 48°, the azimuthal collision of the two shocks occured, and a coalestenta could partly 6e seen within 1 AU;For the case of Δφ=72°,one would not almost see the collision of the two shock waves,that is their progagations are independenteach other. For the case shock with initial velocity ν=2000 km/s, main completely are for the case of Δφ≤48°, the two shock waves completely coalesced into a new shock within 1 AU; For the case of 54°,the two shock waves coalesced into a new shock near 1 AU;For the case of Δφ=72°, the two shock coalesced into a waves collided azimuuthally,For the case ofΔφ=120°the two shock waves propagated Independently.
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1210
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
吕建永,魏奉思,顾惠成,等. 黄道面内行星际激波相互碰撞作用过程研究—间距效应[J]. 空间科学学报,1993,13(2):90-97.
APA 吕建永,魏奉思,顾惠成,&北京8701信箱.(1993).黄道面内行星际激波相互碰撞作用过程研究—间距效应.空间科学学报,13(2),90-97.
MLA 吕建永,et al."黄道面内行星际激波相互碰撞作用过程研究—间距效应".空间科学学报 13.2(1993):90-97.
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