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Shock tube

About: Shock tube is a research topic. Over the lifetime, 6963 publications have been published within this topic receiving 99372 citations.


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Journal ArticleDOI
TL;DR: In this paper, a detailed chemical kinetic model was developed to simulate the stable species profiles up to the formation of single ring aromatic hydrocarbons from the current high pressure oxidation experiments.

43 citations

Journal ArticleDOI
TL;DR: In this article, the authors used a glow-discharge flow tube with a shock-tube driver to provide a considerable extension of atom fluxes, temperatures, and densities for the study of these kinetic processes.
Abstract: The ordinary glow‐discharge tube has been used extensively to study both surface and gas‐phase recombination rates, as well as chemiluminescent reactions, typically at room temperature. The combination of a glow‐discharge flow tube with a shock‐tube driver to provide a considerable extension of atom fluxes, temperatures, and densities for the study of these kinetic processes is described. In operation, the ordinary glow‐discharge‐tube situation appropriate to the particular process under study is first established and, then, a shock is propagated into the predissociated gas by a driver upstream of the rf region. Typically, the shock strength is less than that which causes further dissociation. Under these conditions, the effect of the shock is to compress, heat, and accelerate to high speed those species already in the glow tube. The high temperature and compression provide a means for studying the temperature dependence of gas‐phase recombination processes and chemiluminescent reactions, while the high‐speed flow, in increasing the atom flux, provides a means for studying surface‐catalysis phenomena occurring on a short time scale (<1 msec). Application of the present technique to determine the temperature dependences of the NO–O and CO–O chemiluminescent reactions is described in considerable detail.

43 citations

Journal ArticleDOI
TL;DR: In this article, the decomposition of nitrous oxide has been studied in the temperature range 1815-3365K using a shock tube technique using infrared emission from the 5.3μm vibration-rotation band of NO and from the 4.5 μm vibration rotation band of N2O.
Abstract: The decomposition of nitrous oxide has been studied in the temperature range 1815-3365K using a shock tube technique. Principal results of this study were the determination of the rate constants for the reactions and The experiments were conducted behind incident shock waves in mixtures of N2O and various diluent gases (Ar, Kr, N2, O2). Infrared emission from the 5.3 μm vibration-rotation band of NO and from the 4.5 μm vibration-rotation band of N2O was used to monitor the concentration-time profiles of NO and N2O. A computer simulation of the experiments was used to infer k1 and k2, with the following best-fit results: and for M = Ar, Kr, N2

43 citations

Journal ArticleDOI
TL;DR: In this article, the authors compared the results obtained by this technique with those deduced using a Mach-Zehnder interferometer and provided further evidence as to whether relaxation times depend upon how far the system is from equilibrium as well as on the translational temperature.
Abstract: Vibrational relaxation has been studied in CO2 and CO2–Ar mixtures over the temperature range 360°–3000°K using a laser–schlieren method. The purpose of this investigation was to compare the results obtained by this technique with those deduced using a Mach–Zehnder interferometer and to provide further evidence as to whether relaxation times depend upon how far the system is from equilibrium as well as on the translational temperature. Relaxation times measured by these two methods agree well. The laser–schlieren method is the more satisfactory for measuring the rate of relaxation and the Mach–Zehnder for finding the total density change during the process. These new results support the view that relaxation times do not depend upon how far the system is from equilibrium. The measurements using CO2 and CO2–Ar mixtures show that CO2 is about five times as effective as Ar in causing relaxation at 360°K and two times as effective at 2000°K.

43 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023148
2022285
2021134
2020175
2019173
2018159