IMPROVEMENT OF FLAMEHOLDING CHARACTERISTICS BY INCIDENT SHOCK WAVES IN SUPERSONIC FLOW

2002 ◽  
Vol 5 (1-6) ◽  
pp. 330-339 ◽  
Author(s):  
T. Fujimori ◽  
M. Murayama ◽  
J. Sato ◽  
H. Kobayashi ◽  
S. Hasegawa ◽  
...  
Keyword(s):  
Supersonic Flow ◽  
Shock Waves ◽  
Incident Shock

Flow patterns of dual-incident shock waves/turbulent boundary layer interaction

2020 ◽  
Vol 23 (6) ◽  
pp. 931-935
Author(s):  
Xin Li ◽  
Hui-jun Tan ◽  
Yue Zhang ◽  
He-xia Huang ◽  
Yun-jie Guo ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Shock Waves ◽  
Turbulent Boundary Layer ◽  
Flow Patterns ◽  
Incident Shock ◽  
Layer Interaction ◽  
Boundary Layer Interaction

scholarly journals Shock Loading of Closed Cell Aluminum Foams in the Presence of an Air Cavity

2020 ◽  
Vol 10 (12) ◽  
pp. 4128
Author(s):  
Mahesh Thorat ◽  
Shiba Sahu ◽  
Viren Menezes ◽  
Amol Gokhale ◽  
Hamid Hosano
Keyword(s):  
Shock Waves ◽  
Shock Tube ◽  
Shock Loading ◽  
Pressure Rise ◽  
Incident Shock ◽  
Foam Density ◽  
Aluminum Foams ◽  
Closed Cell ◽  
Rigid Walls ◽  
End Wall

It is important to protect assets located within cavities vulnerable to incident shock waves generated by explosions. The aim of the present work is to explore if closed cell aluminum foams can mediate and attenuate incident shocks experienced by cavities. A small cavity of 9 mm diameter and 2 mm length was created within the steel end-wall of a shock tube and exposed to shocks, directly or after isolating by aluminum foam liners. Shock waves with incident pressure of 9–10 bar travelling at a velocity of 1000–1050 m/s were generated in the shock tube. Compared to the no-foam condition, the pressure induced in the cavity was either equal or lower, depending on whether the foam density was low (0.28 g/cc) or high (0.31 to 0.49 g/cc), respectively. Moreover, the rate of pressure rise, which was very high without and with the low density foam barrier, reduced substantially with increasing foam density. Foams deformed plastically under shock loading, with the extent of deformation decreasing with increasing foam density. Some interesting responses such as perforation of cell walls in the front side and densification in the far side of the foam were observed by a combination of scanning electron microscopy and X-ray microscopy. The present work conclusively shows that shocks in cavities within rigid walls can be attenuated by using foam liners of sufficiently high densities, which resist densification and extrusion into the cavities. Even such relatively high-density foams would be much lighter than fully dense materials capable of protecting cavities from shocks.

Oxidation of Carbon Monoxide Mixtures with Added Ethane or Azomethane Studied in Incident Shock Waves

1971 ◽  
Vol 55 (9) ◽  
pp. 4425-4432 ◽  
Author(s):  
T. P. J. Izod ◽  
G. B. Kistiakowsky ◽  
S. Matsuda
Keyword(s):  
Carbon Monoxide ◽  
Shock Waves ◽  
Incident Shock ◽  
Oxidation Of Carbon Monoxide

Thermal dissociation of oxygen difluoride. I. Incident shock waves

1968 ◽  
Vol 72 (7) ◽  
pp. 2307-2310 ◽  
Author(s):  
Jay A. Blauer ◽  
Wayne C. Solomon
Keyword(s):  
Shock Waves ◽  
Thermal Dissociation ◽  
Incident Shock
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