درباره ما
NACA-TN-3860
Method for calculating effects of dissociation on flow variables in the relaxation zone behind normal shock waves
Year: 1956
Abstract: Generalized expressions and charts which depend on the shock Mach number, the initial state of the gas, and an enthalpy parameter (the enthalpy divided by the ratio of the pressure to the density) are presented for the temperature, pressure, density and flow velocity behind a shock wave. The charts and an enthalpy plot for dissociated air have been used to find the relation in graphical form between the degree of dissociation in air and the enthalpy parameter. Plots are presented of the resulting dependence of the flow variables on the degree of dissociation.
Because the chemical reaction rates needed to predict the dependence of degree of dissociation on distance behind the shock are not known, order-of-magnitude estimates of their values have been used in a numerical example, the purpose of which is to illustrate the use of reaction-rate equations to predict relaxation time and distance behind the shock front.
Because the chemical reaction rates needed to predict the dependence of degree of dissociation on distance behind the shock are not known, order-of-magnitude estimates of their values have been used in a numerical example, the purpose of which is to illustrate the use of reaction-rate equations to predict relaxation time and distance behind the shock front.
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T17:42:00Z | |
| date available | 2017-09-04T17:42:00Z | |
| date copyright | 01/01/1956 | |
| date issued | 1956 | |
| identifier other | DZNUYDAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std/handle/yse/165031 | |
| description abstract | Generalized expressions and charts which depend on the shock Mach number, the initial state of the gas, and an enthalpy parameter (the enthalpy divided by the ratio of the pressure to the density) are presented for the temperature, pressure, density and flow velocity behind a shock wave. The charts and an enthalpy plot for dissociated air have been used to find the relation in graphical form between the degree of dissociation in air and the enthalpy parameter. Plots are presented of the resulting dependence of the flow variables on the degree of dissociation. Because the chemical reaction rates needed to predict the dependence of degree of dissociation on distance behind the shock are not known, order-of-magnitude estimates of their values have been used in a numerical example, the purpose of which is to illustrate the use of reaction-rate equations to predict relaxation time and distance behind the shock front. | |
| language | English | |
| title | NACA-TN-3860 | num |
| title | Method for calculating effects of dissociation on flow variables in the relaxation zone behind normal shock waves | en |
| type | standard | |
| page | 53 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1956 | |
| contenttype | fulltext |