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Shock tube
About: Shock tube is a research topic. Over the lifetime, 6963 publications have been published within this topic receiving 99372 citations.
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TL;DR: In this paper, the authors used a paper diaphragm with Mach number of 1.9 and a supersonic low energy table-top shock tube to simulate the loading of shock wave.
Abstract: Ammonium Dihydrogen Phosphate (ADP) and Potassium Dihydrogen Phosphate (KDP) crystals are grown by slow evaporation method at ambient temperature. The said crystals are utilized as a test specimen and subjected to one-dimensional ‘loading of shock waves’ generated by rupturing a paper diaphragm with Mach number of 1.9 using supersonic low energy table-top shock tube. Thermal diffusivity of crystal is measured using Photoacoustic spectrometer (PAS) for the normal and shock loaded crystals, thermal conductivity and thermal effusivity are computed for the given volumetric specific heat capacity of the crystals. XRD characterization studies reveals that KDP crystal has better immunity to shock wave than ADP crystal.
56 citations
TL;DR: In this article, a background oriented schlieren technique is used to obtain quantitative measurements of shock waves from explosions by processing high speed digital video recordings, which is illustrated by an analysis of two explosions, a high explosive test and a hydrogen gas explosion test.
Abstract: This paper describes application of a background oriented schlieren technique in order to obtain quantitative measurements of shock waves from explosions by processing high speed digital video recordings. The technique is illustrated by an analysis of two explosions, a high explosive test and a hydrogen gas explosion test. The visualization of the shock front is utilized to calculate the shock Mach number, leading to a predicted shock front pressure. For high explosives the method agreed quite well with a standard curve for side-on shock pressures. In the case of the gas explosion test we can also show that the shock front is non-spherical. It should be possible to develop this technique to investigate external blast waves and external explosions from vented gas explosions in more details.
56 citations
TL;DR: In this paper, a single jet and an array of micro-jets are injected from the stagnation zone of a blunt cone model (58, apex angle and nose radius of 35 mm). Nitrogen and Helium are injected as coolant gases.
56 citations
TL;DR: In this article, the equations for planar two-dimensional steady flow of an ideal dissociating gas are linearized, assuming small disturbances to a free stream in chemical equilibrium.
Abstract: The equations for planar two-dimensional steady flow of an ideal dissociating gas are linearized, assuming small disturbances to a free stream in chemical equilibriumAs an example of their solution, the flow past a sharp corner in a supersonic stream is evaluated and the variations of flow properties in the relaxation zone are found Numerical illustrations are provided using an ‘oxygen-like’ ideal gas and comparisons made with a characteristics solution The flow past a sharp corner can be studied in a conventional shock tube and it may be possible to verify the present theory experimentally In particular it may prove feasible to use the results to obtain a measure of the reaction rates in the gas mixture
56 citations
TL;DR: In this paper, high-velocity disturbances are observed to propagate along the walls of a high-explosive operated shock tube in advance of the plane shock and a model is constructed to explain the flow within the disturbance.
Abstract: High‐velocity disturbances are observed to propagate along the walls of a high‐explosive operated shock tube in advance of the plane shock. Experiments are presented which determine the dependence of the geometry, energy, and velocity of the disturbance on such variables as the gas contained in the shock tube, the shock strength, and the roughness and composition of the supporting boundary. A model is constructed to explain the flow within the disturbance. Arguments are presented which show the disturbance to result from radiation originating in the luminous plane shock.
56 citations