High-Speed Schlieren Visualization of Mach 6 Flow Past a Cone with Varied Parameters

2020 ◽  
Author(s):  
David Labuda ◽  
Jeffrey Komives ◽  
Mark F. Reeder ◽  
Matthew P. Borg ◽  
Joseph S. Jewell
Keyword(s):  
High Speed ◽  
Schlieren Visualization ◽  
Flow Past

High-Speed Rarefied Flow Past a Rotating Cylinder: The Inverse Magnus Effect

AIAA Journal ◽  
2016 ◽  
Vol 54 (5) ◽  
pp. 1670-1681 ◽  
Author(s):  
Benzi John ◽  
Xiao-Jun Gu ◽  
Robert W. Barber ◽  
David R. Emerson
Keyword(s):  
High Speed ◽  
Rotating Cylinder ◽  
Rarefied Flow ◽  
Flow Past ◽  
Magnus Effect

Hypersonic Swirling Flow past Blunt Bodies

1973 ◽  
Vol 24 (4) ◽  
pp. 241-251 ◽  
Author(s):  
Roger Smith
Keyword(s):  
High Speed ◽  
Swirling Flow ◽  
Pressure Coefficient ◽  
Density Ratio ◽  
Perturbation Expansion ◽  
The Body ◽  
Constant Density ◽  
Flow Past ◽  
Speed Flow ◽  
Blunt Bodies

SummaryThe effect of swirl on the high speed flow past blunt bodies is analysed by assuming constant density in the region between the shock wave and the body. For small swirl the stand-off distance is only slightly affected, but it is shown that there is a critical value of the swirl parameter which, if exceeded, will cause a jump in the position of the shock. This is demonstrated by solving the full constant-density equations for the flow past a sphere and by a perturbation expansion in powers of the density ratio across the shock for a more general body shape. The perturbation solution shows that the pressure coefficient on the body is constant at the critical swirl number.

High-speed time-resolved color schlieren visualization of shock wave phenomena

Shock Waves ◽  
2005 ◽  
Vol 14 (5-6) ◽  
pp. 333-341 ◽  
Author(s):  
H. Kleine ◽  
K. Hiraki ◽  
H. Maruyama ◽  
T. Hayashida ◽  
J. Yonai ◽  
...  
Keyword(s):  
Shock Wave ◽  
High Speed ◽  
Time Resolved ◽  
Schlieren Visualization ◽  
Wave Phenomena

Turbulent Flow Past a Surface-Mounted Two-Dimensional Rib

1994 ◽  
Vol 116 (2) ◽  
pp. 238-246 ◽  
Author(s):  
S. Acharya ◽  
S. Dutta ◽  
T. A. Myrum ◽  
R. S. Baker
Keyword(s):  
Kinetic Energy ◽  
Shear Layer ◽  
High Speed ◽  
Two Dimensional ◽  
Duct Flow ◽  
Core Flow ◽  
The Core ◽  
Separated Shear Layer ◽  
Flow Past ◽  
The Mean

The ability of the nonlinear k–ε turbulence model to predict the flow in a separated duct flow past a wall-mounted, two-dimensional rib was assessed through comparisons with the standard k–ε model and experimental results. Improved predictions of the streamwise turbulence intensity and the mean streamwise velocities near the high-speed edge of the separated shear layer and in the flow downstream of reattachment were obtained with the nonlinear model. More realistic predictions of the production and dissipation of the turbulent kinetic energy near reattachment were also obtained. Otherwise, the performance of the two models was comparable, with both models performing quite well in the core flow regions and close to reattachment and both models performing poorly in the separated and shear-layer regions close to the rib.

A0-Wave and A-Wave in Cylindrical Shell Immersed in Water: Influence on the Acoustic Scattering

1999 ◽  
Author(s):  
Gérard Maze ◽  
Nicolas Touraine ◽  
André Baillard ◽  
Dominique Decultot ◽  
Véronique Latard ◽  
...  
Keyword(s):  
Cylindrical Shell ◽  
Lamb Wave ◽  
High Speed ◽  
Acoustic Scattering ◽  
Stoneley Wave ◽  
High Speed Camera ◽  
Low Frequencies ◽  
Schlieren Visualization ◽  
The Subject ◽  
Structure Inhomogeneity

Abstract In low frequencies (ka < 200), the A-wave (Scholte-Stoneley wave) and the S0-wave (first symmetrical Lamb wave) are the subject of a particular attention in the study of the acoustic scattering from empty cylindrical shells immersed in water. If the tube is in water, the A0-wave (flexural Lamb wave) which circumnavigates in the shell in vacuum, does not originate resonances in the backscattered pressure spectrum while the two others are active. Images of the acoustic scattering from cylindrical or spherical targets obtained from the “Schlieren” visualization using a high-speed camera show the typical re-radiation of the A0+-wave in water. Moreover, the backscattered signal recorded with one emitter-receiver transducer shows one echo which cannot attributed to the A- or S0-waves. In this paper, the propagation of the A0+-wave has been especially studied to explain the experimental results. This A0+-wave has a great impact if it crosses over a structure inhomogeneity after a short propagation in the shell, before its complete attenuation.

Schlieren visualization for high-speed flows based on laser-induced fluorescence

2014 ◽  
Vol 55 (2) ◽  
Author(s):  
Tamas Regert ◽  
Guillaume Grossir ◽  
Sébastien Paris ◽  
Luis Blay Esteban
Keyword(s):  
High Speed ◽  
Laser Induced Fluorescence ◽  
Schlieren Visualization ◽  
High Speed Flows
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