Topic
Rarefaction
About: Rarefaction is a research topic. Over the lifetime, 1852 publications have been published within this topic receiving 26943 citations.
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TL;DR: In this article, a theoretical and experimental investigation of spontaneous condensation of water vapor in a centered rarefaction wave formed by flow around a protuberant angle by a hypersonic stream is presented.
Abstract: The analysis of the process of spontaneous condensation in one-dimensional formulation is dealt with adequately in many papers. However, in reality supersonic flows are not one-dimensional. The most striking effect of two-dimensionality is manifested in two-phase flows, for example in nozzles, inclined sections of jet turbine grills and rarefaction waves. The investigation of these flows, both in the experimental and theoretical aspect, is a complex problem for which a solution has been found only recently. The results are given in this paper of a theoretical and experimental investigation of spontaneous condensation of water vapor in a centered rarefaction wave formed by flow around a protuberant angle by a hypersonic stream.
9 citations
TL;DR: Luminous phenomena accompanying a cylindrical shock wave have been observed under extreme conditions by Michel-Levy, Muraour and Vassy as discussed by the authors through head-on collision of shocks generated by explosives.
Abstract: LUMINOUS phenomena accompanying shock waves have been observed under extreme conditions by Michel-Levy, Muraour and Vassy1 through head-on collision of shocks generated by explosives, and by Perry and Kantrowitz2 at the point of convergence of a cylindrical shock wave A related phenomenon is observed in the gas discharges of Fowler, Goldstein and Clotfelter3, although the creation of the shocks in this type of work is of an electrical nature and does not immediately allow a hydrodynamic interpretation
9 citations
TL;DR: In this paper, the effects of surface roughness, gas rarefaction, and ACs on the bearing performance of magnetic head sliders with fixed configurations were considered, and the results of the analysis were expressed as functions of roughness parameters.
Abstract: The average flow model is utilized to derive an average Reynolds type equation, which includes the effects of surface roughness, gas rarefaction, and accommodation coefficients (ACs). The related flow factors (pressure flow factors, shear flow factors) are derived in closed form and are expressed as functions of roughness parameters (standard deviation of the composite roughness, Peklenik number and film thickness ratio), Knudsen number, and ACs. Finally, the effects of surface roughness, gas rarefaction, and ACs on the bearing performance of magnetic head sliders with fixed configurations are considered.
9 citations
TL;DR: In this paper, a criterion for the excitation of detonation is proposed: the critical initiation energy equals the work performed by the expanding detonation products along a path length equal to the longitudinal dimension of a cell.
Abstract: A criterion for the excitation of detonation is proposed: the critical initiation energy equals the work performed by the expanding detonation products along a path length equal to the longitudinal dimension of a cell. The initial radius of the layer is chosen to be equal to the radius of the detonation wave diffracted at 90° edge at the time the axial rarefaction wave converges on the axis of the gaseous charge. Formulas are obtained for estimating the critical energy for initiation of plane, cylindrical, and spherical detonation waves. The calculated values are in good agreement with experiment.
9 citations
TL;DR: In this article, the effect of elevated rotational and vibrational temperatures on electron beam density measurements was discussed, discussing effect of the vibrational and rotational temperature on the beam density.
Abstract: Electron beam density measurements, discussing effect of elevated rotational and vibrational temperatures
9 citations