Unique Solvability in the Lavrent’ev–Bitsadze Model for Two Problems of Weakly Supersonic Symmetric Flow with Detached Shock Wave Past a Wedge

2020 ◽  
Vol 56 (12) ◽  
pp. 1587-1593
Author(s):  
E. I. Moiseev ◽  
E. G. Shifrin
Keyword(s):  
Shock Wave ◽  
Unique Solvability ◽  
Symmetric Flow ◽  
Detached Shock Wave

Vorticity on the Surface of an Axially Symmetric Body behind a Detached Shock Wave

2018 ◽  
Vol 63 (12) ◽  
pp. 530-532 ◽  
Author(s):  
V. A. Levin ◽  
V. V. Markov ◽  
G. B. Sizykh
Keyword(s):  
Shock Wave ◽  
Symmetric Body ◽  
Axially Symmetric ◽  
Detached Shock Wave

Transonic Flow Past a Wedge with Detached Shock Wave

1952 ◽  
Vol 19 (10) ◽  
pp. 715-715
Author(s):  
A. H. Armstrong ◽  
M. Holt ◽  
C. K. Thornhill
Keyword(s):  
Shock Wave ◽  
Transonic Flow ◽  
Flow Past ◽  
Detached Shock Wave

Impingement of Under-Expanded Jets on a Flat Plate

1990 ◽  
Vol 112 (2) ◽  
pp. 179-184 ◽  
Author(s):  
J. Iwamoto
Keyword(s):  
Shock Wave ◽  
Flow Field ◽  
Flat Plate ◽  
Maximum Pressure ◽  
Axially Symmetric ◽  
Symmetric Flow ◽  
Reversed Flow ◽  
Pressure Distributions ◽  
Sonic Jet ◽  
Wave Forms

When an under-expanded sonic jet impinges on a perpendicular flat plate, a shock wave forms just in front of the plate and some interesting phenomena can occur in the flow field between the shock and the plate. In this paper, experimental and numerical results on the flow pattern of this impinging jet are presented. In the experiments the flow field was visualized using shadow-photography and Mach-Zehnder interferometry. In the numerical calculations, the two-step Lax-Wendroff scheme was applied, assuming inviscid, axially symmetric flow. Some of the pressure distributions on the plate show that the maximum pressure does not occur at the center of the plate and that a region of reversed flow exists near the center of the plate.

Spectroscopic Studies of the Dark Space ahead of a Shock Wave in an Argon Plasma Flow

1983 ◽  
Vol 38 (7) ◽  
pp. 802-807
Author(s):  
Michio Nishida ◽  
Akihiko Nakajima
Keyword(s):  
Shock Wave ◽  
Blunt Body ◽  
Transition Probabilities ◽  
Argon Plasma ◽  
Spectroscopic Studies ◽  
The Body ◽  
Population Densities ◽  
Spatially Resolved ◽  
Detached Shock Wave ◽  
Dark Space

Abstract Spectroscopic studies of the dark space ahead of a detached shock wave caused by a blunt body were made in a partially ionized argon flow. From emission measurements, spatially resolved population densities of states 5p[3/2], 5p[5/2] and 4p[3/2] were determined at 20 stations in the flow, for both cases when the blunt body is placed in the flow and when it is withdrawn. The result shows that the population densities of the above mentioned states ahead of the shock wave are reduced when the body is placed in the flow. A prediction was obtained by assuming a steady state population for all levels higher than level 4 s. In the prediction the measured electron temperatures and densities were employed to determine collisional transition probabilities. From a comparison of the experiment with the prediction, it is considered that the dark space is caused by the elevation in the electron temperature ahead of the shock wave.

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