scholarly journals The Ignition of Methane-Oxygen Mixture by Shock Wave

1958 ◽  
Vol 31 (2) ◽  
pp. 232-236 ◽  
Author(s):  
Momotaro Suzuki ◽  
Hajime Miyama ◽  
Shiro Fujimoto
Keyword(s):  
Shock Wave ◽  
Oxygen Mixture

scholarly journals The Ignition of Methane-Oxygen Mixture by Reflected Shock Wave

1962 ◽  
Vol 35 (2) ◽  
pp. 316-318 ◽  
Author(s):  
Momotaro Suzuki ◽  
Hajime Miyama ◽  
Shiro Fujimoto ◽  
Tsuneo Kase
Keyword(s):  
Shock Wave ◽  
Reflected Shock Wave ◽  
Oxygen Mixture ◽  
Reflected Shock

scholarly journals Limits of shock wave ignition of hydrogen–oxygen mixture in the presence of particles

2018 ◽  
Vol 946 ◽  
pp. 012073 ◽  
Author(s):  
V P Efremov ◽  
L R Obruchkova ◽  
M F Ivanov ◽  
A D Kiverin
Keyword(s):  
Shock Wave ◽  
Oxygen Mixture

The precursor shock wave and flame propagation enhancement by CO2 injection in a methane-oxygen mixture

Fuel ◽  
2021 ◽  
Vol 283 ◽  
pp. 118917 ◽  
Author(s):  
Jun Cheng ◽  
Bo Zhang ◽  
Hong Liu ◽  
Fuxing Wang
Keyword(s):  
Shock Wave ◽  
Flame Propagation ◽  
Oxygen Mixture ◽  
Co2 Injection

scholarly journals On the Shock Wave Ignition of Propane-Oxygen Mixture

1960 ◽  
Vol 63 (12) ◽  
pp. 2124-2130
Author(s):  
Kiroku Yamazaki ◽  
Yoshio Kato
Keyword(s):  
Shock Wave ◽  
Oxygen Mixture

Dynamic Effects Under Gaseous Detonation and Mechanical Response of Piping Structures

2009 ◽  
Author(s):  
M. Kuznetsov ◽  
A. Lelyakin ◽  
W. Breitung ◽  
J. Grune ◽  
K. Sempert ◽  
...  
Keyword(s):  
Shock Wave ◽  
Mechanical Response ◽  
Gaseous Detonation ◽  
Oxygen Mixture ◽  
Maximum Pressure ◽  
Detonation Pressure ◽  
Flame Velocity ◽  
Dynamic Effects ◽  
Worst Case ◽  
Pressure Load

A series of experiments and numerical simulations on hydrogen detonations in piping geometry was performed in order to reproduce the worst case scenario regarding the maximum internal pressure load and integrity of a piping structure to detonation pressure loads. To reproduce different scenarios of the detonation process and different pressure loads on the piping structure, nitrogen-diluted hydrogen-oxygen mixtures were studied. The mechanical response of 12.5-m long austenitic steel pipe with an outer diameter of 510 mm and wall thickness of 15 mm was investigated as well. A novel 1-D CFD code with a prescribed flame velocity model was used for the numerical simulation of the deflagration to detonation transition (DDT) and for the calculation of pressure loads at various positions along the tube. Different gas dynamic effects such as precursor shock waves and shock reflections on the maximum pressure were investigated in the calculations. Maximum pressure load of a pipe with two end flanges can be achieved near the DDT point and at the tube ends. Dilution of the hydrogen-oxygen mixture with nitrogen leads to a reduction of the mixture reactivity and to an increase of the run-up distance to the DDT point. In this case so called “late detonation initiation”, a cumulative effect of precursor shock wave, detonation ignition and shock wave reflections, can occur near the tube end. It produces extremely high pressure loads which can be 10 times higher than the CJ-detonation pressure of the initial gas mixture. Such scenarios of the combustion process have been experimentally reproduced with detailed pressure and strain measurements along the test tube.

Luminescent Characteristics of the Shock-Wave Ignition of an Ethylene−Oxygen Mixture

2016 ◽  
Vol 189 (5) ◽  
pp. 854-868 ◽  
Author(s):  
V. N. Smirnov ◽  
A. M. Tereza ◽  
P. A. Vlasov ◽  
I. V. Zhiltsova
Keyword(s):  
Shock Wave ◽  
Oxygen Mixture

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.

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