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Experimental Study of a Disk Diaphragm Thickness Influence on a Planar Shock Wave Formation and Position During its Propagation in a Gas Shock Tube

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Abstract

A Shock tube is a piece of equipment in which, by creating a pressure difference between the driver and the driven section via the bursting membrane, it has the ability to generate shock waves with very short rise time. One of the important parameters in the shock tube is the planar shock wave and the distance of its formation along the driven section. In this study, the shock wave pressure was measured at different sections along the shock tube as well as at different radial distances, using three piezoresistive pressure sensors. Experiments were repeated with three different thicknesses of diaphragms 0.1, 0.2, and 0.3 mm. Diaphragms were made of Mylar. The results of the tests were extracted using TRAww software, which is a software for signal processing of the pressure sensors, and the distance of the planar shock wave for different diaphragms was obtained. The results show that by increasing the diaphragm thickness and thus increasing the explosion pressure (pressure of the driver area), the shock wave pressure increased, and the planar shock wave propagates further away in the driven section. The uniform duration of the shock wave using a diaphragm with a thickness of 0.1 mm is smaller than the other two diaphragms, and the planar shock wave is not stable until the end of the shock tube. Also, the pressure drop in the driven section after the failure of the diaphragm increases with increasing diaphragm thickness.

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Authors and Affiliations

  1. Mechanical Engineering, K.N. Toodi University, Tehran, Iran

    F. Sardarzadeh & J. Zamani

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  1. F. Sardarzadeh
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  2. J. Zamani
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Correspondence to F. Sardarzadeh.

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Sardarzadeh, F., Zamani, J. Experimental Study of a Disk Diaphragm Thickness Influence on a Planar Shock Wave Formation and Position During its Propagation in a Gas Shock Tube. Exp Tech 45, 497–508 (2021). https://doi.org/10.1007/s40799-020-00412-6

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  • DOI: https://doi.org/10.1007/s40799-020-00412-6

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