%0 Journal Article
%T Role of on-board discharge in shock wave drag reduction and plasma cloaking
%A Qiu Xiao-Ming
%A Tang De-Li
%A Sun Ai-Ping
%A Liu Wan-Dong
%A Zeng Xue-Jun
%A <br>邱孝明
%A 唐德礼
%A 孙爱萍
%A 刘万东
%A 曾学军
%J 中国物理 B
%D 2007
%I 
%X In the present paper, a physical model is proposed for reducing the problem of the drag reduction of an attached bow shock around the nose of a high-speed vehicle with on-board discharge, to the problem of a balance between the magnetic pressure and gas pressure of plane shock of a partially ionized gas consisting of the environmental gas around the nose of the vehicle and the on-board discharge-produced plasma. The relation between the shock strength and the discharge-induced magnetic pressure is studied by means of a set of one-fluid, hydromagnetic equations reformed for the present purpose, where the discharge-induced magnetic field consists of the electron current (produced by the discharge)-induced magnetic field and the partially ionized gas flow-induced one. A formula for the relation between the above parameters is derived. It shows that the discharge-induced magnetic pressure can minimize the shock strength, successfully explaining the two recent experimental observations on attached bow shock mitigation and elimination in a supersonic flow during on-board discharge Phys. Plasmas 9 (2002) 721 and Phys. Plasmas 7 (2000) 1345]. In addition, the formula implies that the shock elimination leaves room for a layer of higher-density plasma rampart moving around the nose of the vehicle, being favourable to the plasma radar cloaking of the vehicle. The reason for it is expounded.
%K attached bow shock and magnetohydrodynamic (MHD) drag reduction
%K on-board discharges
%K plasma cloaking
%K MHD and fluid equation<br>等离子体
%K 激波阻力减小
%K 磁流体动力学
%K 物理模型
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=CD8D6A6897B9334F09D8D1648C376FB4&aid=FF458534E88FE56FD3B4D7E0DC7B06C7&yid=A732AF04DDA03BB3&vid=7801E6FC5AE9020C&iid=CA4FD0336C81A37A&sid=50BBDFAC8381694B&eid=C29816B2656377A7&journal_id=1009-1963&journal_name=中国物理&referenced_num=0&reference_num=16