A Measurement of the Recombination Rate of Oxygen PDF Download
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Author: J. WILSON
Publisher:
ISBN:
Category :
Languages : en
Pages : 1
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Book Description
The recombination rate of oxygen has been measured in a shock tube. The gas in the tube is first dissociated and set in motion by the shock wave, then flows through the expansion waves created by the airfoils and is cooled, and finally flows into the constant-area channel, where it recombines. Shock waves between M = 7.5 and M = 9.5 in mixtures of oxygen and argon at 2 cm. Hg. pressure are used, giving degrees of dissociation between 0.1 and 0.4. The temperature drop across the expansion is about 700 K. Measurement of the degree of dissociation downstream of the expansion leads to the recombination rate. The means of measurement is absorption of ultra-violet light at a wavelength of 2283 angstroms. (Author).
Author: J. WILSON
Publisher:
ISBN:
Category :
Languages : en
Pages : 1
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Book Description
The recombination rate of oxygen has been measured in a shock tube. The gas in the tube is first dissociated and set in motion by the shock wave, then flows through the expansion waves created by the airfoils and is cooled, and finally flows into the constant-area channel, where it recombines. Shock waves between M = 7.5 and M = 9.5 in mixtures of oxygen and argon at 2 cm. Hg. pressure are used, giving degrees of dissociation between 0.1 and 0.4. The temperature drop across the expansion is about 700 K. Measurement of the degree of dissociation downstream of the expansion leads to the recombination rate. The means of measurement is absorption of ultra-violet light at a wavelength of 2283 angstroms. (Author).
Author: R. I. Soloukhin
Publisher:
ISBN:
Category :
Languages : en
Pages : 19
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Book Description
The recombination rate of oxygen atoms was measured directly in thermally pre-dissociated pure oxygen in a shock tube at a temperature above 3000K. A discrepancy of two to three orders of magnitude between various earlier, indirectly obtained experimental data prompted the author to attempt a direct measurement of the recombination rate, in view of its importance in the analysis of the combustion process and in high-temperature gas dynamics. (Author).
Author: Jack Wilson
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 160
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Book Description
The recombination rate of oxygen was measured in a shock tube. The shock tube is unconventional in that airfoils have been inserted to expand the flow, and a constant-area channel placed behind the airfoils; thus the shock tube is effectively a low-expansion-ratio shock tunnel. The gas in the tube is first dissociated and set in motion by the shock wave, then flows through the expansion waves created by the airfoils, and is cooled, and finally enters the constant-area channel, where it recombines. Measurement of the degree of dissociation along the constant area channel enables one to calculate the recombination rate of the oxygen atoms. The measured recombination rate constants are compared with those obtained by reflecting the known dissociation-rate constants through the equilibrium constant. (Author).
Author: Eugene Joseph Kilroy
Publisher:
ISBN:
Category : Oxygen
Languages : en
Pages : 130
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Author: Wilbur C. Nelson
Publisher: Elsevier
ISBN: 1483223310
Category : Science
Languages : en
Pages : 801
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Book Description
The High Temperature Aspects of Hypersonic Flow is a record of the proceedings of the AGARD-NATO Specialists' Meeting, held at the Technical Centre for Experimental Aerodynamics, Rhode-Saint-Genese, Belgium in April 1962. The book contains the papers presented during the meeting that tackled a broad range of topics in the aspects of hypersonic flow. The subjects covered during the meeting include pressure measurements, interference effects, the use of wind tunnels in aircraft development testing, high temperature gas characteristics, boundary layer research, stability and control and the use of rocket vehicles in flight research. Aerospace engineers and aeronautical engineers will find the book invaluable.
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 154
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 968
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 450
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Author: Lewis Gregory Hogan
Publisher:
ISBN:
Category : Oxygen
Languages : en
Pages : 228
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The three-body heterogeneous and wall recombination coefficients for atomic oxygen were measured using an electron paramagnetic resonance spectrometer to monitor the time dependence of the atomic oxygen concentration. This measurement was made for a pressure range of from .224 to 1.10 torr using pyrolysis of ozone as a source of oxygen atoms. The three-body heterogeneous rate constant, k1, with molecular oxygen as the third body was determined independent of ozone concentration to be (5.43 ± . 08) x 10-34 cc 2 molecule-2 sec-1 The wall recombination efficiency, y, for a fused metaphosphoric acid-sodium metaphosphate mixture, the wall coating, was found to be 9.1 x 10-6. The recombination coefficient, k1, resulting from a computer fit of the data to the usual recombination model is compared to literature values obtained from discharged oxygen, ozone pyrolysis, and chemiluminescence measurements. The role that ozone concentration plays throughout the atomic oxygen decay and the possible effects of its neglect is discussed.
Author: United States. National Aeronautics and Space Administration
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1556
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