Interferometric study of the shock wave formed in air by a supersonic plasma jet from a pulsed discharge

Journal Article · Thu Jan 01 04:00:00 EST 1987 · Combust., Explos. Shock Waves (Engl. Transl.); (United States)

DOI:https://doi.org/10.1007/BF00862896· OSTI ID:6173758

Burmakov, A P; Novik, G M; Zhumar', A Yu

A supersonic plasma stream was created by an electrical discharge generator with a storage capacity of 140 microfarads and a starting voltage of 1 kV. The plasma was expanded through a cylindrical nozzle into air under normal conditions. Holographic interferometry was used to study the shock wave generated by the stream. The interferometer, operating in a real time regime and coupled to a high-speed photorecorder, attained a space and time resolution of 0.1 cm and 1 microsecond, respectively. The interferograms showed that in the initial instant of time (less than or equal to 10 microseconds) the shock wave surface was close to the surface of an ellipsoid of rotation with a semiaxis ratio close to unity which, as the distance from the wave increases, changed over into a spherical surface with a center at the outlet of the nozzle. Figures are used to illustrate the dependence of Mach number of the shock wave on time and other results.

• OSTI ID: 6173758
• Journal Information: Combust., Explos. Shock Waves (Engl. Transl.); (United States), Journal Name: Combust., Explos. Shock Waves (Engl. Transl.); (United States) Vol. 22:4; ISSN CESWA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
AIR
ELECTRIC DISCHARGES
EXPANSION
FLUID FLOW
FLUIDS
GASES
HOLOGRAPHY
INTERFEROMETRY
MACH NUMBER
PLASMA
PLASMA DIAGNOSTICS
PLASMA EXPANSION
PLASMA GUNS
PLASMA JETS
PLASMA PRODUCTION
RESOLUTION
SHOCK WAVES
SPATIAL RESOLUTION
SUPERSONIC FLOW
TIME DEPENDENCE
TIME RESOLUTION
TIMING PROPERTIES
VELOCITY
WAVE PROPAGATION