Author: James Verne DaltonPublisher:
ISBN:
Category :
Languages : en
Pages : 80
Book Description
Similarity of Coupled Non-equilibrium Flows Behind Normal Shock Waves
Author: James Verne DaltonSimilitude for Normal Shock Waves in Nonequilibrium Flows
Author: Ralph E. ThomasPublisher:
ISBN:
Category : Shock waves
Languages : en
Pages : 60
Book Description
Similarity parameters are developed which govern the length of nonequilibrium zones behind normal shock waves. Non-equilibrium effects produced by both vibrational relaxation and dissociation are considered. The parameters can also account for arbitrary levels of free-stream vibrational energy or dissociation level. The validity of the parameters is examined using numerical computations of the properties of the non-equilibrium fields. These computations are made with the aid of experimentally based rate expressions. The parameters, when written in a form describing the variation of non-equilibrium zone length with Mach number, are shown to have acceptable accuracy. (Author).
Chemical Non-equilibrium Shock Flow
Author: V. A. LangeloPublisher:
ISBN:
Category : Air flow
Languages : en
Pages : 70
Book Description
The problem of calculating the flow behind a normal shock front is discussed. The additional complication of finite reaction rate chemistry has been included. A numerical method and several results of flow across a shock wave with an eleven-species, thirteen reaction model of air are presented. Results of the method are discussed and compared with those of Hall, Escheroeder, and Marrone (inviscid hypersonic air flows with coupled non-equilibrium processes. IAS 30th annual meeting, Jan 1962). (Author).
Inviscid, Nonequilibrium Flow Behind Bow and Normal Shock Waves: General analysis and numerical examples, by P. V. Marrone
Author: Cornell Aeronautical LaboratoryPublisher:
ISBN:
Category : Shock waves
Languages : en
Pages : 120
Book Description
Inviscid, Nonequilibrium Flow Behind Bow and Normal Shock Waves: The revised normal shock program, by Leonard J. Garr [and others] 1966
![Inviscid, Nonequilibrium Flow Behind Bow and Normal Shock Waves: The revised normal shock program, by Leonard J. Garr [and others] 1966 PDF](https://books.google.com/books/content/images/frontcover/BZZTAAAAYAAJ?fife=w80-h100)
Author: Cornell Aeronautical LaboratoryPublisher:
ISBN:
Category : Shock waves
Languages : en
Pages : 144
Book Description
Radiation-coupled Chemical Nonequilibrium Normal Shock Waves
Author: Martin Philip ShermanPublisher:
ISBN:
Category : Radiation
Languages : en
Pages : 62
Book Description
The problem of a normal shock wave in air or other gas with complex chemistry and coupled radiation is considered. Molecular transport properties are neglected and the gas mixture is assumed in translational, rotation, vibrational and electronic equilibrium with the local temperature. Only continuum radiation is included. Solutions are presented for strong shock waves in air, where air is assumed to consist of eleven species, N2, O2, O, NO, NO+, N+, O, N2+, O2+ and electrons. The usal methods of integrating the stiff ordinary differential equations of chemical nonequilibrium flow are limited to very small step sizes. Methods are developed which permit vastly larger step sizes. Solutions are obtained for the optically thin case, and with absorption of radiation behind the shock front. The spectrum is broken into regions inside of which the absorption cross sections are only a function of temperature. (Author).
Study of the Nonequilibrium Flow Field Behind Normal Shock Waves in Carbon Dioxide
Author: John T. HowePublisher:
ISBN:
Category : Carbon dioxide
Languages : en
Pages : 48
Book Description
A Simplified Molecular Model for Studying Vibration-dissociation Coupling in Fluid Flows
Author: Walter Albert ReinhardtPublisher:
ISBN:
Category : Dissociation
Languages : en
Pages : 340
Book Description
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.
Study of High-density Hypervelocity Flows and Similitudes
Author: Cornell Aeronautical LaboratoryPublisher:
ISBN:
Category : Gas flow
Languages : en
Pages : 320
Book Description
Author: