scholarly journals Supersonic airplane engine jet influence on the intensity of tail shock wave of sonic boom waveform

2019 ◽  
Vol 1404 ◽  
pp. 012126
Author(s):  
V F Volkov
Keyword(s):  
Shock Wave ◽  
Sonic Boom ◽  
Airplane Engine

Numerical simulation of shock wave focusing at fold caustics, with application to sonic boom

2003 ◽  
Vol 114 (4) ◽  
pp. 1758-1771 ◽  
Author(s):  
Régis Marchiano ◽  
François Coulouvrat ◽  
Richard Grenon
Keyword(s):  
Numerical Simulation ◽  
Shock Wave ◽  
Sonic Boom ◽  
Wave Focusing ◽  
Shock Wave Focusing

Analysis of Sonic Boom Flight Test Measurements Near the Shock Wave Extremity

1974 ◽  
Vol 11 (12) ◽  
pp. 745-751
Author(s):  
G. T. Haglund ◽  
E. J. Kane
Keyword(s):  
Shock Wave ◽  
Flight Test ◽  
Sonic Boom

Shock wave propagation in heterogeneous medium, from ultrasound to sonic boom

2008 ◽  
Vol 123 (5) ◽  
pp. 3695-3695
Author(s):  
Lili Ganjehi ◽  
François Coulouvrat ◽  
Jean‐Louis Thomas ◽  
Régis Marchiano
Keyword(s):  
Shock Wave ◽  
Wave Propagation ◽  
Heterogeneous Medium ◽  
Shock Wave Propagation ◽  
Sonic Boom

Non linear shock wave propagation in heterogeneous fluids: a numerical approach beyond the parabolic approximation with application to sonic boom.

2008 ◽  
Author(s):  
Franck Dagrau ◽  
François Coulouvrat ◽  
Régis Marchiano ◽  
Nicolas Héron ◽  
Bengt Enflo ◽  
...  
Keyword(s):  
Shock Wave ◽  
Wave Propagation ◽  
Numerical Approach ◽  
Shock Wave Propagation ◽  
Sonic Boom ◽  
Parabolic Approximation ◽  
Non Linear

scholarly journals Sonic Boom Mitigation through Shock Wave Dispersion

2020 ◽  
Author(s):  
Constantin Sandu ◽  
Radu-Constantin Sandu ◽  
Cristian-Teodor Olariu
Keyword(s):  
Shock Wave ◽  
Wave Dispersion ◽  
Sonic Boom

A new type of defect structure in 124-superconducting oxide revealed by HREM

1991 ◽  
Vol 49 ◽  
pp. 1092-1093
Author(s):  
R. Sharma ◽  
B.L. Ramakrishna ◽  
N.N. Thadhani ◽  
D. Hianes ◽  
Z. Iqbal
Keyword(s):  
Shock Wave ◽  
Defect Structure ◽  
Neutron Radiation ◽  
Weak Links ◽  
Defect Structures ◽  
New Materials ◽  
New Type ◽  
Current Densities ◽  
Processing Techniques ◽  
Microstructural Studies

After materials with superconducting temperatures higher than liquid nitrogen have been prepared, more emphasis has been on increasing the current densities (Jc) of high Tc superconductors than finding new materials with higher transition temperatures. Different processing techniques i.e thin films, shock wave processing, neutron radiation etc. have been applied in order to increase Jc. Microstructural studies of compounds thus prepared have shown either a decrease in gram boundaries that act as weak-links or increase in defect structure that act as flux-pinning centers. We have studied shock wave synthesized Tl-Ba-Cu-O and shock wave processed Y-123 superconductors with somewhat different properties compared to those prepared by solid-state reaction. Here we report the defect structures observed in the shock-processed Y-124 superconductors.

Investigation of shock-wave deformation history from recovered structure

1986 ◽  
Vol 44 ◽  
pp. 434-435
Author(s):  
M.A. Mogilevsky ◽  
L.S. Bushnev
Keyword(s):  
Shock Wave ◽  
Plastic Deformation ◽  
Dislocation Density ◽  
Shock Waves ◽  
Shock Front ◽  
Single Crystals ◽  
Residual Deformation ◽  
Deformation Structure ◽  
Deformation History ◽  
Deformation Velocity

Single crystals of Al were loaded by 15 to 40 GPa shock waves at 77 K with a pulse duration of 1.0 to 0.5 μs and a residual deformation of ∼1%. The analysis of deformation structure peculiarities allows the deformation history to be re-established.After a 20 to 40 GPa loading the dislocation density in the recovered samples was about 1010 cm-2. By measuring the thickness of the 40 GPa shock front in Al, a plastic deformation velocity of 1.07 x 108 s-1 is obtained, from where the moving dislocation density at the front is 7 x 1010 cm-2. A very small part of dislocations moves during the whole time of compression, i.e. a total dislocation density at the front must be in excess of this value by one or two orders. Consequently, due to extremely high stresses, at the front there exists a very unstable structure which is rearranged later with a noticeable decrease in dislocation density.

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