Simulations for ionizing reflected-shock waves in argon in a shock tube

1990 ◽  
Author(s):  
Y. Takano
Keyword(s):  
Shock Waves ◽  
Shock Tube ◽  
Reflected Shock

Shock-initiated exothermic reactions. VI. The oxidation of ethylene oxide and cyclopropane

1969 ◽  
Vol 22 (7) ◽  
pp. 1355 ◽  
Author(s):  
LJ Drummond ◽  
J Kikkert
Keyword(s):  
Shock Waves ◽  
Ethylene Oxide ◽  
Shock Tube ◽  
Induction Period ◽  
Ignition Delay ◽  
Exothermic Reactions ◽  
Induction Periods ◽  
Reflected Shock ◽  
Formaldehyde Oxidation ◽  
Temperature Dependences

Mixtures of ethylene oxide or cyclopropane with oxygen and argon were ignited with reflected shock waves In a shock tube. The temperature dependences of the ignition delay and the growth of light emitted during the induction period to explosion of C2H4O-O2 mixtures indicate that the rate-controlling reaction is that of formaldehyde oxidation. The temperature dependence of induction periods for C3H6-O2 mixtures suggests that a complicated but undetermined mechanism controls the delay to ignition.

Shock-Tube Study of Cr* Chemiluminescence During the Induction Period of the C2H2–O2 Reaction

1971 ◽  
Vol 49 (23) ◽  
pp. 3904-3907
Author(s):  
David Gutman ◽  
Shimpei Matsuda
Keyword(s):  
Shock Waves ◽  
Shock Tube ◽  
Induction Period ◽  
Emission Intensity ◽  
Gas Mixture ◽  
Chain Branching ◽  
Growth Constant ◽  
Reflected Shock ◽  
Tube Study

The Cr* (a7S–y7P) chemiluminescence at 360 nm during the induction period of the C2H2–O2 reaction was studied behind reflected shock waves. When the reaction gas mixture containing 10 p.p.m. Cr(CO)6, 0.5% C2H2, 1.0% O2, and 98.5% Ar was shock heated to 1650 °K, the emission intensity of Cr* grew exponentially with a growth constant equal to the chain branching constant. This observation indicates that reaction(s) leading to Cr* chemiluminescence involve only one chain carrier during the induction period of the C2H2–O2 reaction. The mechanism of the chemical excitation of Cr is discussed.

Nonideal effects behind reflected shock waves in a high-pressure shock tube

Shock Waves ◽  
2001 ◽  
Vol 10 (6) ◽  
pp. 405-420 ◽  
Author(s):  
Eric L. Petersen ◽  
Ronald K. Hanson
Keyword(s):  
High Pressure ◽  
Shock Waves ◽  
Shock Tube ◽  
Pressure Shock ◽  
Reflected Shock

scholarly journals Experimental investigation of shock waves in liquid helium I and II

1976 ◽  
Vol 75 (2) ◽  
pp. 373-383 ◽  
Author(s):  
John C. Cummings
Keyword(s):  
Shock Wave ◽  
Experimental Investigation ◽  
Shock Waves ◽  
Shock Tube ◽  
Liquid Helium ◽  
Initial Conditions ◽  
Incident Shock ◽  
Incident Shock Wave ◽  
Liquid Interface ◽  
Reflected Shock

The flow field produced by a shock wave reflecting from a helium gas-liquid interface was investigated using a cryogenic shock tube. Incident and reflected shock waves were observed in the gas; transmitted first- and second-sound shocks were observed in the liquid. Wave diagrams are constructed to compare the data with theoretical wave trajectories. Qualitative agreement between data and theory is shown. Quantitative differences between data and theory indicate a need for further analysis of both the gas-liquid interface and the propagation of nonlinear waves in liquid helium.This work was a first step in the experimental investigation of a complex non-equilibrium state. The results demonstrate clearly the usefulness of the cryogenic shock tube as a research tool. The well-controlled jump in temperature and pressure across the incident shock wave provides unique initial conditions for the study of dynamic phenomena in superfluid helium.

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