Journal ArticleDOI
Energy accommodation during oxygen atom recombination on metal surfaces
Gerald A. Melin,Robert J. Madix +1 more
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In this paper, the recombination coefficient, γ′H and the energy accommodation coefficient, βH were simultaneously determined for hydrogen atom recombination on Ag, Au, Co, Cu, W, Fe, Ni and Pt filaments.Abstract:
The recombination coefficient, γ′H and the energy accommodation coefficient, βH were simultaneously determined for hydrogen atom recombination on Ag, Au, Co, Cu, W, Fe, Ni and Pt filaments. Values of βH of 0.87, 0.65 and 0.43 were observed for Ag, Au and Cu, respectively, while values between 0.08 and 0.28 were observed for the other metals. In general, the relative values of βH for these filaments were similar to the values of β previously determined for oxygen atom recombination.read more
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Journal ArticleDOI
Recombination coefficient of atomic oxygen on ceramic materials under earth re-entry conditions by optical emission spectroscopy
TL;DR: In this paper, the authors developed a chemical approach for evaluating the recombination coefficient of atomic oxygen γO by Optical Emission Spectroscopy and measured the gas temperature above the material, close to the surface where recombination occurs.
Proceedings ArticleDOI
Catalytic recombination of nitrogen and oxygen on high-temperature reusable surface insulation
TL;DR: In this article, the energy transfer catalytic recombination coefficient for nitrogen and oxygen recombination on the surface coating of high-temperature reusable surface insulation (HRSI) is inferred from stagnation point heat flux measurements in a hightemperature dissociated arc jet flow.
Journal ArticleDOI
Electron‐impact excitation of the 3S0 and 5S0 states of atomic oxygen
E. J. Stone,E. C. Zipf +1 more
TL;DR: In this article, the conditions of electron-impact excitation in flowing oxygen downstream from a discharge are reinterpreted and it is shown that total oxygen mass flow is not conserved as the discharge is turned on and off, even though the inlet flow rate remains constant.
Journal ArticleDOI
Effect of O2(a1Δg) on plasma structures in oxygen radio frequency discharges
TL;DR: In this paper, the authors numerically analyzed the number of glow discharges between parallel plates by using the relaxation continuum model and showed that O2(a1Δg) has a number density that is an order of magnitude larger than that of atomic oxygen.
Journal ArticleDOI
Modeling of Nitrogen and Oxygen Recombination on Partial Catalytic Surfaces
TL;DR: A reaction scheme including detailed rate expressions for O and N atom recombination on the surface of re-entry vehicles is established, consisting of elementary reaction steps, and a quantitative agreement is achieved between recombination coefficients resulting from the numerical computations and those calculated from experiments.
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