Reacting Viscous Shock Layer Solutions With Multicomponent Diffusion And Mass Injection

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Reacting Viscous Shock Layer Solutions With Multicomponent Diffusion And Mass Injection

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Author : James N. Moss
language : en
Publisher:
Release Date : 1974

Reacting Viscous Shock Layer Solutions With Multicomponent Diffusion And Mass Injection written by James N. Moss and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Shock waves categories.

This study presents numerical solutions of the viscous-shock-layer equations where the chemistry is treated as being either frozen, equilibrium, or nonequilibrium. Also the effects of the diffusion model, surface catalysis, and mass injection on surface transport and flow parameters are considered. The flow is treated as a mixture of five inert and thermally perfect species. The viscous-shock-layer equations are solved by using an implicit-difference scheme. All calculations are for hyperboloids with included angles of 20° and 45°. The flight conditions are those for various altitudes and velocities in the Earth's atmosphere. Data are presented to show the effects of the chemical models; diffusion models; surface catalysis; and mass injection of air on heat transfer; skin friction; shock standoff distance; wall pressure distribution; and tangential victory, temperature, and species profiles. The results show that an equilibrium analysis can substantially overpredict the heat-transfer rates for flow conditions experienced by earth-orbital entry vehicles. Moreover, at such conditions surface catalysis significantly influences heat-transfer and flow-field properties. If a binary rather than a multicomponent diffusion model is assumed, negligible errors in most flow properties result. Quantitative results are presented that show the effect of mass injection on flow properties within and downstream of the injection region.

Reacting Viscous Shock Layer Solutions With Multicomponent Diffusion And Mass Injection

DOWNLOAD
Author : James N. Moss
language : en
Publisher:
Release Date : 1974

Reacting Viscous Shock Layer Solutions With Multicomponent Diffusion And Mass Injection written by James N. Moss and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Shock waves categories.

This study presents numerical solutions of the viscous-shock-layer equations where the chemistry is treated as being either frozen, equilibrium, or nonequilibrium. Also the effects of the diffusion model, surface catalysis, and mass injection on surface transport and flow parameters are considered. The flow is treated as a mixture of five inert and thermally perfect species. The viscous-shock-layer equations are solved by using an implicit-difference scheme. All calculations are for hyperboloids with included angles of 20° and 45°. The flight conditions are those for various altitudes and velocities in the Earth's atmosphere. Data are presented to show the effects of the chemical models; diffusion models; surface catalysis; and mass injection of air on heat transfer; skin friction; shock standoff distance; wall pressure distribution; and tangential victory, temperature, and species profiles. The results show that an equilibrium analysis can substantially overpredict the heat-transfer rates for flow conditions experienced by earth-orbital entry vehicles. Moreover, at such conditions surface catalysis significantly influences heat-transfer and flow-field properties. If a binary rather than a multicomponent diffusion model is assumed, negligible errors in most flow properties result. Quantitative results are presented that show the effect of mass injection on flow properties within and downstream of the injection region.

Nasa Technical Report

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Author :
language : en
Publisher:
Release Date : 1974

Nasa Technical Report written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Aerodynamics categories.

Nasa Technical Paper

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Author : United States. National Aeronautics and Space Administration
language : en
Publisher:
Release Date : 1977

Nasa Technical Paper written by United States. National Aeronautics and Space Administration and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with Aeronautics categories.

Monthly Catalog Of United States Government Publications

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Author :
language : en
Publisher:
Release Date : 1976

Monthly Catalog Of United States Government Publications written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Government publications categories.

Computational Fluid Dynamics Techniques

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Author : Fathi Habashi
language : en
Publisher: CRC Press
Release Date : 1995-11-22

Computational Fluid Dynamics Techniques written by Fathi Habashi and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995-11-22 with Technology & Engineering categories.

First published in 1995. Routledge is an imprint of Taylor & Francis, an informa company.

Monthly Catalog Of United States Government Publications Cumulative Index

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Author : United States. Superintendent of Documents
language : en
Publisher:
Release Date : 1976

Monthly Catalog Of United States Government Publications Cumulative Index written by United States. Superintendent of Documents and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with United States categories.

Nasa Technical Note

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Author :
language : en
Publisher:
Release Date : 1975

Nasa Technical Note written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with categories.

Scientific And Technical Aerospace Reports

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Author :
language : en
Publisher:
Release Date : 1974

Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Aeronautics categories.

Low Density Flow Effects For Hypervelocity Vehicles

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Author : Roop N. Gupta
language : en
Publisher:
Release Date : 1990

Low Density Flow Effects For Hypervelocity Vehicles written by Roop N. Gupta and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Aerodynamics, Hypersonic categories.

Detailed flowfield results have been obtained for sphere-cone shaped bodies at various angles of attack with a 3D nonequilibrium viscous-shock-layer (VSL) code. Recently obtained surface and shock-slip boundary conditions are implemented to account for the low-density effects. These boundary conditions may also be employed with the Navier-Stokes equations with or without a shock-fitting solution technique. A method is suggested for obtaining the input shock shape for the 3D nonequilibrium viscous flow. This approach gives a superior convergence of results, especially under the low-density flow conditions and makes the VSL method self-starting. The analytic algebraic grid implemented with the equations does not add any numerical dissipation. Obtained results show the effect of low density on the surrounding flowfield and surface quantities for a hypervelocity vehicle. Good agreement is obtained with the available numerical results (including the Direct Simulation Monte-Carlo predictions) and experimental data for the low-density flight conditions. Keywords: Axisymmetric hypervelocity vehicles; Three-dimensional flow; Low density flow fields; Viscous shock layer equations; Nonequilibrium viscous flow; Angle of attack. (EDC).