Author: K. Terao
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
Book Description
The electron temperature, the density and the ion temperature in argon gas behind reflected shock waves were measured by a laser light scattering method, while the gas temperature was measured by the spectroscopic method. The values of these three temperatures are different from each other during a certain period after arrival of the reflected shock front. Both the electron and ion temperatures are much higher than the theoretical gasdynamic temperature. The ionization rate is also much higher than that in the equilibrium state, but the measured gas temperature is lower than the theoretical one. These results suggest that the argon gas is in a non-equilibrium state during the first period.
Experimental Study on the Ionization of Argon Gas in a Non-Equilibrium State Behind Reflected Shock Waves
Author: K. Terao
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
Book Description
The electron temperature, the density and the ion temperature in argon gas behind reflected shock waves were measured by a laser light scattering method, while the gas temperature was measured by the spectroscopic method. The values of these three temperatures are different from each other during a certain period after arrival of the reflected shock front. Both the electron and ion temperatures are much higher than the theoretical gasdynamic temperature. The ionization rate is also much higher than that in the equilibrium state, but the measured gas temperature is lower than the theoretical one. These results suggest that the argon gas is in a non-equilibrium state during the first period.
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
Book Description
The electron temperature, the density and the ion temperature in argon gas behind reflected shock waves were measured by a laser light scattering method, while the gas temperature was measured by the spectroscopic method. The values of these three temperatures are different from each other during a certain period after arrival of the reflected shock front. Both the electron and ion temperatures are much higher than the theoretical gasdynamic temperature. The ionization rate is also much higher than that in the equilibrium state, but the measured gas temperature is lower than the theoretical one. These results suggest that the argon gas is in a non-equilibrium state during the first period.
Approach to Equilibrium Ionization Behind Strong Shock Waves in Argon
Author: Harry Petschek
Publisher:
ISBN:
Category :
Languages : en
Pages : 72
Book Description
Previous work on strong shock waves in argon has shown that the degree of ionization reaches thermodynamic equilibrium for shock speeds greater than about ten times the speed of sound in room temperature argon. The degree of ionization reaches about 25% at the highest shock strengths available in an ordinary shock tube. This paper reports a detailed theoretical and experimental study of the approach of high temperature argon to this equilibrium degree of ionization. The mechanism for the approach to equilibrium can be divided into two stages. The first, which accounts for about 10% of the final ionization, is apparently controlled by impurities present in the gas even after considerable care is taken to insure high purity. In the second stage ionization by electron-atom collisions becomes dominant. The rate of ionization by this process is limited by the rate of energy transfer to electrons by elastic collisions with the atoms and ions in the gas and is relatively independent of the inelastic ionization crosssection. This rate is calculated and is in agreement with experimental measurements making use of (1) the visible continuum radiation from the gas, and (2) the electrostatic potentials in the gas due to the diffusion of electrons. (Author).
Publisher:
ISBN:
Category :
Languages : en
Pages : 72
Book Description
Previous work on strong shock waves in argon has shown that the degree of ionization reaches thermodynamic equilibrium for shock speeds greater than about ten times the speed of sound in room temperature argon. The degree of ionization reaches about 25% at the highest shock strengths available in an ordinary shock tube. This paper reports a detailed theoretical and experimental study of the approach of high temperature argon to this equilibrium degree of ionization. The mechanism for the approach to equilibrium can be divided into two stages. The first, which accounts for about 10% of the final ionization, is apparently controlled by impurities present in the gas even after considerable care is taken to insure high purity. In the second stage ionization by electron-atom collisions becomes dominant. The rate of ionization by this process is limited by the rate of energy transfer to electrons by elastic collisions with the atoms and ions in the gas and is relatively independent of the inelastic ionization crosssection. This rate is calculated and is in agreement with experimental measurements making use of (1) the visible continuum radiation from the gas, and (2) the electrostatic potentials in the gas due to the diffusion of electrons. (Author).
Shock Tubes and Waves
Author: Charles E. Treanor
Publisher: SUNY Press
ISBN: 9780873955959
Category : Philosophy
Languages : en
Pages : 1130
Book Description
Proceedings from a symposium on shock tubes and waves held July 6-9, 1981.
Publisher: SUNY Press
ISBN: 9780873955959
Category : Philosophy
Languages : en
Pages : 1130
Book Description
Proceedings from a symposium on shock tubes and waves held July 6-9, 1981.
Japanese Science and Technology, 1983-1984
Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1080
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1080
Book Description
Interferometric Study of the Nonequilibrium Shock Reflection Process and Thermal Layer in Ionizing Argon
Author: Ralph Arnold Kuiper
Publisher:
ISBN:
Category : Argon
Languages : en
Pages : 152
Book Description
Publisher:
ISBN:
Category : Argon
Languages : en
Pages : 152
Book Description
Equilibrium Hydrodynamic Variables Behind the Primary and Reflected Shock Waves in Argon and Nitrogen
Author: Norman T. Grier
Publisher:
ISBN:
Category : Argon
Languages : en
Pages : 60
Book Description
Publisher:
ISBN:
Category : Argon
Languages : en
Pages : 60
Book Description