Vol. 112, Issue 1, January 2010, pp. 24-38

Simulation of the Two-Phase Liquid – Gas Flow through Ultrasonic Transceivers Application in Ultrasonic Tomography

¹Zulkarnay Zakaria, ¹Mohd Hafiz Fazalul Rahiman, ²Ruzairi Abdul Rahim

¹Tomographic Imaging Research Group,

School of Mechatronic Engineering, Universiti Malaysia Perlis, 02600 Jejawi, Perlis, Malaysia

Tel.: +604-9798149, fax: +604-9798142

²Process Tomography Research Group (PROTOM),

Control and Instrumentation Engineering Department,

Faculty of Electrical Engineering, Universiti Teknologi Malaysia,

81310 Skudai, Johor, Malaysia.

E-mail: zulkarnay@unimap.edu.my

Received: 28 October 2010   /Accepted: 22 January 2010   /Published: 29 January 2010

Abstract: In this paper, ultrasonic transmission mode tomography was used to visualize the two phase liquid/gas flow in a pipe/vessel. The sensing element consists of 8, 16 and 32 units ultrasonic transceivers were used to cover the pipe cross-section at different time. The motivation of this paper is to analyze the optimum numbers of transceivers which can give the best performance in providing better image of the two phase liquid/gas flow. This paper also details the development of the system including the ultrasonic transduction circuits, the electronic measurement circuits, the data acquisition system and the image reconstruction techniques. Ten conditions of liquid-gas flow have been simulated. The system was found capable of visualizing the internal characteristics and provides the concentration profile for the corresponding liquid and gas phases while the 32 transceivers has provided the best image for the ten conditions applied.

Keywords: Ultrasonic tomography, Ultrasonic transceivers, Liquid and gas flow, Flow measurement system

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