Author: James N. Moss
Publisher:
ISBN:
Category : Shock waves
Languages : en
Pages : 156
Book Description
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
Author: James N. Moss
Publisher:
ISBN:
Category : Shock waves
Languages : en
Pages : 156
Book Description
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.
Publisher:
ISBN:
Category : Shock waves
Languages : en
Pages : 156
Book Description
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.
Solutions for Reacting and Nonreacting Viscous Shock Layers with Multicomponent Diffusion and Mass Injection
Reacting Viscous-shock-layer Solutions with Multicomponent Diffusion and Mass Injuction [with List of References]
Reacting Viscous-shock-layer Solutions with Multicomponent Diffusion and Mass Injection
Author: James N. Moss
Publisher:
ISBN:
Category : Shock waves
Languages : en
Pages : 156
Book Description
Publisher:
ISBN:
Category : Shock waves
Languages : en
Pages : 156
Book Description
Solutions for Reacting and Nonreacting Viscous Shock Layers with Multicompettent Diffusion and Mass Injection
Author: James Norvel Moss
Publisher:
ISBN:
Category : Shock waves
Languages : en
Pages : 202
Book Description
Publisher:
ISBN:
Category : Shock waves
Languages : en
Pages : 202
Book Description
NASA Technical Report
Monthly Catalog of United States Government Publications
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1932
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1932
Book Description
Monthly Catalog of United States Government Publications, Cumulative Index
Author: United States. Superintendent of Documents
Publisher:
ISBN:
Category : United States
Languages : en
Pages : 1408
Book Description
Publisher:
ISBN:
Category : United States
Languages : en
Pages : 1408
Book Description