TY - JOUR
T1 - Electric discharge in the presence of supersonic shocks
AU - Kuo, S. P.
AU - Bivolaru, Daniel
N1 - Funding Information:
This work was supported by the Air Force Office of Scientific Research (AFOSR) under the Grant AFOSR-F49620-01-1-0392.
PY - 2003/6/23
Y1 - 2003/6/23
N2 - A cone-shaped shock generator is placed in a Mach 2.5 flow to generate a conic shock attached to its tip. The tip and the body of the model are also designed as the cathode and anode, which are separated by a conical-shaped ceramic insulator providing a 5-mm gap for on-board gaseous discharge to produce plasma around the tip. The interaction of 60 Hz pulsed discharge with this shock wave is studied by means of the spatial distribution and temporal evolution of discharge-induced airglow images. As shown, when the flow becomes unstable during the discharge, signified by the sudden appearance of additional diamond shock in the flow, the discharge mode also starts to oscillate between the constricted arc and diffused arc, manifesting relaxation instability.
AB - A cone-shaped shock generator is placed in a Mach 2.5 flow to generate a conic shock attached to its tip. The tip and the body of the model are also designed as the cathode and anode, which are separated by a conical-shaped ceramic insulator providing a 5-mm gap for on-board gaseous discharge to produce plasma around the tip. The interaction of 60 Hz pulsed discharge with this shock wave is studied by means of the spatial distribution and temporal evolution of discharge-induced airglow images. As shown, when the flow becomes unstable during the discharge, signified by the sudden appearance of additional diamond shock in the flow, the discharge mode also starts to oscillate between the constricted arc and diffused arc, manifesting relaxation instability.
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U2 - 10.1016/S0375-9601(03)00721-7
DO - 10.1016/S0375-9601(03)00721-7
M3 - Article
AN - SCOPUS:0038343445
SN - 0375-9601
VL - 313
SP - 101
EP - 105
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
IS - 1-2
ER -