%0 Journal Article
%T NUMERICAL INVESTIGATION OF DIFFRACTION, FOCUSING AND REFLECTION OF TOROIDAL SHOCK WAVES<br>环形激波绕射, 反射和聚焦的数值模拟研究
%A Teng Honghui Jiang Zonglin Han Zhaoyuan
%A <br>滕宏辉
%A 姜宗林
%A 韩肇元
%J 力学学报
%D 2004
%I 
%X An investigation of toroidal shock wave motion in a cylindrical shock tube is described in this paper. Numerical simulations were carried out by using dispersion controlled dissipation scheme (DCD scheme) and validated with experimental data. From the numerical results, the toroidal shock wave diffraction, focusing and reflection were discussed in detail. It was found out that the key factor of cylindrical shock focusing is the shock acceleration when diffracting shock waves propagate toward the axis of symmetry. Mach numbers of incident toroidal shock waves play an important role in shock wave diffraction and focusing. The toroidal shock waves focus at certain point on the axis of symmetry while usual cylindrical shock waves focus on the entire the axis of symmetry, therefore, the focusing effect resulting from the two cases of focusing points are different essentially.
%K shock wave focusing
%K diffraction
%K numerical simulation<br>激波聚焦
%K 激波绕射
%K 数值模拟
%K 激波动力学
%K 激波反射
%K 马赫数
%K 数值离散
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=5D344E2AD54D14F8&jid=4100DA4A1A3BA1B0CE5AD99AE1DFB420&aid=6EA9D8B272674F61&yid=D0E58B75BFD8E51C&vid=933658645952ED9F&iid=CA4FD0336C81A37A&sid=9CF7A0430CBB2DFD&eid=23CCDDCD68FFCC2F&journal_id=0459-1879&journal_name=力学学报&referenced_num=6&reference_num=8