An Experimental Investigation of Normal Shock Wave Velocity Distribution Functions in Mixtures of Argon and Helium PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download An Experimental Investigation of Normal Shock Wave Velocity Distribution Functions in Mixtures of Argon and Helium PDF full book. Access full book title An Experimental Investigation of Normal Shock Wave Velocity Distribution Functions in Mixtures of Argon and Helium by Laurence Neil Harnett. Download full books in PDF and EPUB format.
Author: Laurence Neil Harnett Publisher: ISBN: Category : Gases, Rare Languages : en Pages : 306
Book Description
The electron beam-spectroscopic technique developed by Muntz for measuring simple one-dimensional moments of helium velocity distribution functions was extended for use with argon. Measurements were made on argon-helium gas mixture normal shock waves at low Mach numbers. Intensity versus wavelength profiles of single spectral lines for each gas were determined at fixed points within the shock waves with a Fabry-Perot interferometer. Lines of sight both perpendicular and parallel to the flow direction were chosen. By using appropriate calibration functions, the effect of Doppler broadening on the line structure was isolated from all other sources of line broadening, and in this way curves of parallel and perpendicular temperature for each gas as functions of position were constructed. Macroscopic velocities were measured by determining the blue shift in the line profiles when the line of sight shifted from the perpendicular to the parallel direction. The data thus obtained provided detailed information on the variation of species velocities and parallel and perpendicular temperatures within the shock waves. These results were then compared with existing theories and other experimental results. (Author).
Author: Laurence Neil Harnett Publisher: ISBN: Category : Gases, Rare Languages : en Pages : 306
Book Description
The electron beam-spectroscopic technique developed by Muntz for measuring simple one-dimensional moments of helium velocity distribution functions was extended for use with argon. Measurements were made on argon-helium gas mixture normal shock waves at low Mach numbers. Intensity versus wavelength profiles of single spectral lines for each gas were determined at fixed points within the shock waves with a Fabry-Perot interferometer. Lines of sight both perpendicular and parallel to the flow direction were chosen. By using appropriate calibration functions, the effect of Doppler broadening on the line structure was isolated from all other sources of line broadening, and in this way curves of parallel and perpendicular temperature for each gas as functions of position were constructed. Macroscopic velocities were measured by determining the blue shift in the line profiles when the line of sight shifted from the perpendicular to the parallel direction. The data thus obtained provided detailed information on the variation of species velocities and parallel and perpendicular temperatures within the shock waves. These results were then compared with existing theories and other experimental results. (Author).
Author: Tommaso Ruggeri Publisher: Springer Nature ISBN: 3030591441 Category : Mathematics Languages : en Pages : 675
Book Description
Rational extended thermodynamics (RET) is the theory that is applicable to nonequilibrium phenomena out of local equilibrium. It is expressed by the hyperbolic system of field equations with local constitutive equations and is strictly related to the kinetic theory with the closure method of the hierarchies of moment equations. The book intends to present, in a systematic way, new results obtained by RET of gases in both classical and relativistic cases, and it is a natural continuation of the book "Rational Extended Thermodynamics beyond the Monatomic Gas" by the same authors published in 2015. However, this book addresses much wider topics than those of the previous book. Its contents are as follows: RET of rarefied monatomic gases and of polyatomic gases; a simplified RET theory with 6 fields being valid far from equilibrium; RET where both molecular rotational and vibrational modes exist; mixture of gases with multi-temperature. The theory is applied to several typical topics (sound waves, shock waves, etc.) and is compared with experimental data. From a mathematical point of view, RET can be regarded as a theory of hyperbolic symmetric systems, of which it is possible to conduct a qualitative analysis. The book represents a valuable resource for applied mathematicians, physicists, and engineers, offering powerful models for many potential applications such as reentering satellites into the atmosphere, semiconductors, and nanoscale phenomena.
Author: S. R. M. (Stanley Ray Macniven) Sinclair Publisher: National Library of Canada ISBN: Category : Shock waves Languages : en Pages : 51
Book Description
The research was concerned with a theoretical description of shock wave structure in gaseous mixtures when diffusive effects are important. The problem considered in detail is the structure of a shock wave in a helium-argon mixture in which the argon is present in very small concentration. An anomalous result, cited in the literature, suggesting that the argon undergoes an initial pre-expansion before compression, was analysed to show the theoretical origin of this effect. The velocity distribution of a trace of heavy gas (and its lower moments) are watched as the heavy particles pass through a Mott-Smith background shock of lighter particles. The Mott-Smith background is chosen because its bimodal Maxwellian form provides an analytical determination of the free path to the next event for the heavy test particle at any point along its trajectory. This so-called Monte Carlo solution to the idealized diffusion shock problem can be used as a standard for evaluating the diffusion equations derived from various kinetic theory approximations. A number of systems of moment equations of the heavy particle Boltzmann equation were solved and the resulting heavy particle moment profiles compared with those of the Monte Carlo solution. A second strong diffusion problem was analysed from a kinetic theory point of view. It was found experimentally that the ion density profile through a shock in a weakly ionized plasma with elevated electron temperature is much more diffuse than the neutral atom shock. The theoretical analysis shows that this strong diffusion effect can be attributed to the electrical coupling between the ions and the hotter electron gas. (Author).
Author: Jim J. Jones Publisher: ISBN: Category : Helium Languages : en Pages : 716
Book Description
An experimental investigation has been made of the attenuation of strong shock waves in air in a shock tube. Time-history measurements were made of the static pressure at several stations in the wall of the tube. The internal diameter of the tube is 3.75 inches. shock-wave-velocity data were taken for a distance along the tube of about 120 feet.
Author: A. B. Bailey Publisher: ISBN: Category : Aerodynamics, Hypersonic Languages : en Pages : 72
Book Description
An experimental investigation was made to determine the pressure distribution, shock shape, and shock detachment distance for spheres and the latter two characteristics for flatfaced bodies in a heated argon flow. The modified Newtonian approximation for the pressure distribution, which is strictly an empirical relationship, gives good results when applied to the first 60 degrees of a hemisphere under conditions where the body boundary layer and the shock layer merge. The natural flow visualization produced as a result of the high total temperature and consequent excitation of the argon enabled this study to be made. Photographs taken of the shocks generated by a series of spheres and flat-faced bodies were analyzed with a photo-densitometer to determine the shock shape and shock detachment distance. The blast analogy predicts a difference in the shape of shocks in argon and air at high Mach numbers and Reynolds numbers. An empirical relationship proposed by Love was used to calculate the shock shape in air for Mach numbers corresponding to those of the present investigation. (Author).
Author: Laurence Neil Harnett
Author: Laurence Neil Harnett
Author: 
Author: Tommaso Ruggeri
Author: S. R. M. (Stanley Ray Macniven) Sinclair
Author: Jim J. Jones
Author: A. B. Bailey
Author: 
Author: 
Author: 
Author: