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Category :
Languages : en
Pages : 870
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Author:
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ISBN:
Category :
Languages : en
Pages : 870
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Author: United States. National Aeronautics and Space Administration Scientific and Technical Information Division
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ISBN:
Category : Aeronautics
Languages : en
Pages : 966
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ISBN:
Category : Aeronautics
Languages : en
Pages : 952
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ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 804
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Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information Division
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ISBN:
Category : Aeronautics
Languages : en
Pages : 962
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Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information Division
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ISBN:
Category : Science
Languages : en
Pages : 956
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Category : Government publications
Languages : en
Pages :
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Category : Aeronautics
Languages : en
Pages : 360
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Author: Walter Albert Reinhardt
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Category : Dissociation
Languages : en
Pages : 340
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A simplified mathematical model is derived that is useful for studying the effects of vibration-dissociation coupling in fluid flows. The derivation is based on energy-moment procedure for simplifying the master equations. To obtain the model equations it is assumed that the vibrational energy can be approximated by the introduction of two vibrational temperatures. The effects of molecular anharmonicity are also accounted for in an approximate manner. The parameters contained within the equations are evaluated by making comparisons with experimental data. It is shown that the model contains the minimum required structure allowing favorable agreement with existing experimental data. Numerical solutions are given for the quasi-steady zone behind a normal shock wave, for the complete structure of a shock wave, and for nozzle flow. The results provide the appropriate pre-exponential temperature dependence of the effective dissociation rate, yield and induction time before dissociation is observed, and, in the case of expanding flow, yield one-fourth less effective relaxation time than the Landau-Teller theory. The thermodynamic quantities for the vibrational mode (partition function, internal energy, and specific heat) agree accurately with like quantities evaluated from spectroscopic data. By the introduction of appropriate assumptions it is shown that the equations reduce to a form identical to the Marrone-Treanor model except for a "truncation factor". When the vibrational temperatures are not large, the model is identical to that of Landau and Teller. The numerical procedure used to integrate the system of rate and flow equations is also described.
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Category : Government reports announcements & index
Languages : en
Pages : 1008
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