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The Effects of Area Contraction on Shock Wave Strength and Peak Pressure in Shock Tube

M. Z., Yusoff and A. M., Mohseen and A., Al-Falahi and N. H., Shuaib (2012) The Effects of Area Contraction on Shock Wave Strength and Peak Pressure in Shock Tube. International Journal of Automotive and Mechanical Engineering (IJAME), 5 (Jan. pp. 587-596. ISSN 2229-8648 (Print); 2180-1606 (Online)

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Abstract

This paper presents an experimental investigation into the effects of area contraction on shock wave strength and peak pressure in a shock tube. The shock tube is an important component of the short duration, high speed fluid flow test facility, available at the Universiti Tenaga Nasional (UNITEN), Malaysia. The area contraction was facilitated by positioning a bush adjacent to the primary diaphragm section, which separates the driver and driven sections. Experimental measurements were performed with and without the presence of the bush, at various diaphragm pressure ratios, which is the ratio of air pressure between the driver (high pressure) and driven (low pressure) sections. The instantaneous static pressure variations were measured at two locations close to the driven tube end wall, using high sensitivity pressure sensors, which allow the shock wave strength, shock wave speed and peak pressure to be analysed. The results reveal that the area contraction significantly reduces the shock wave strength, shock wave speed and peak pressure. At a diaphragm pressure ratio of 10, the shock wave strength decreases by 18%, the peak pressure decreases by 30% and the shock wave speed decreases by 8%.

Item Type: Article
Uncontrolled Keywords: Shock tube; Shock wave; Area contraction
Subjects: T Technology > TJ Mechanical engineering and machinery
Faculty/Division: Faculty of Mechanical Engineering
Depositing User: Pn. Hazlinda Abd Rahman
Date Deposited: 20 Nov 2012 04:24
Last Modified: 25 Jul 2018 08:07
URI: http://umpir.ump.edu.my/id/eprint/2908
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