scholarly journals Synthesis of Highly Energetic PolyNitrogen by Nanosecond-Pulsed Plasma in Liquid Nitrogen

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4292
Author(s):  
Danil Dobrynin ◽  
Zhiheng Song ◽  
Alexander Fridman
Keyword(s):  
Shock Wave ◽  
Experimental Study ◽  
Wave Propagation ◽  
Gas Phase ◽  
Liquid Nitrogen ◽  
Ambient Pressure ◽  
Nitrogen Compound ◽  
Pulsed Plasma ◽  
Ftir Analysis ◽  
Temperature Dependent

We report on an experimental study of nanosecond-pulsed plasma treatment of liquid nitrogen demonstrating synthesis of a highly energetic nitrogen material. Raman, FTIR analysis of gas phase products of decomposition, and the material explosion characteristics suggest synthesis of polymeric (amorphous) nitrogen compound which is stable at ambient pressure up to temperatures of about −150 °C. Addition of adsorbents with relatively large characteristic pore sizes (>5 nm) allows marginally improved recovery of the material as determined by temperature-dependent Raman measurements. By analyzing the shock wave propagation resulting from the explosions, we estimated the energy density of the material to be 13.3 ± 3.5 kJ/g, close to the previously predicted value for amorphous polymeric nitrogen.

Numerical and Experimental Study on the Cavitating Flow Characteristics of Pressurized Liquid Nitrogen in a Horizontal Rectangular Nozzle

2004 ◽  
Vol 127 (4) ◽  
pp. 515-524 ◽  
Author(s):  
Jun Ishimoto ◽  
Masahiro Onishi ◽  
Kenjiro Kamijo
Keyword(s):  
Experimental Study ◽  
Gas Phase ◽  
Liquid Nitrogen ◽  
Cooling System ◽  
Continuous Process ◽  
Cavity Growth ◽  
Flow Characteristics ◽  
Cavitating Flow ◽  
Rectangular Nozzle ◽  
Thermodynamic Effect

The thermodynamic effect on cryogenic cavitating flow characteristics of pressurized liquid nitrogen in a horizontal rectangular nozzle is precisely investigated by numerical analysis based on an unsteady thermal nonequilibrium two-fluid model and by flow visualization measurement. According to the numerical and experimental study, the sufficiently useful results are proposed to realize the further development and high performance of a type of cryogenic two-phase cooling system. It is numerically and experimentally found that the inception of cryogenic cavitation occurs and the cavity grows in the vicinity of the wall surface of the inlet throat section. It is also found that the continuous process and behavior of cavitation inception, cloud cavity growth, and gas phase diffusion behavior with time in pressurized liquid nitrogen are dominated not only by several additional forces in the gas-phase momentum equation, but also by the thermodynamic effect that acts on the cavitation bubbles due to the inherent properties of cryogenic fluid. Especially under conditions of the same temperature and same aspect ratio of the cloud cavity, similar generating behavior of cavitation can be often found in the high Reynolds number region in spite of large cavitation number.

Experimental study of plane and cylindrical laser driven, shock wave propagation

1975 ◽  
Vol 15 (1) ◽  
pp. 108-111 ◽  
Author(s):  
Danièle Billon ◽  
Daniel Cognard ◽  
Jacques Launspach ◽  
Claude Patou ◽  
Denys Redon ◽  
...  
Keyword(s):  
Shock Wave ◽  
Experimental Study ◽  
Wave Propagation ◽  
Shock Wave Propagation
Sign in / Sign up

Export Citation Format

Share Document