Plasma effect on shock waves in a supersonic flow

Citation
Sp. Kuo et D. Bivolaru, Plasma effect on shock waves in a supersonic flow, PHYS PLASMA, 8(7), 2001, pp. 3258-3264
Citations number
21
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS OF PLASMAS
ISSN journal
1070-664X → ACNP
Volume
8
Issue
7
Year of publication
2001
Pages
3258 - 3264
Database
ISI
SICI code
1070-664X(200107)8:7<3258:PEOSWI>2.0.ZU;2-P
Abstract
An experimental study of the plasma effect on the structure of an attached conical shock front appearing at the front end of a cone-shaped model has b een carried out in a Mach 2.5 stream. The tip and the body of the model are designed as the cathode and anode, which are separated by a conical-shaped ceramic insulator providing a 5 mm gap for gaseous discharge. The electric field intensity near the cathode is enhanced by the sharpness of the tip. The experimental results show that the diffused discharge can produce plasm a distributed symmetrically around the tip in the region in front of the sh ock wave. It is observed that such plasma can cause shock wave moving upstr eam with its shock front detached from the model. The shock front is also b ecoming more and more diffusive and having an increasing shock angle as see n in the shadow video graphs of the flow. A physical mechanism of the obser ved plasma effect on this type of shock wave is also presented. (C) 2001 Am erican Institute of Physics.