The Proceedings of the Fluids engineering conference
Online ISSN : 2424-2896
2018
Session ID : OS3-6
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Measurement of void distribution in liquid-gas two-phase flow using reflection method
*Daijiro AKIZUKI[in Japanese][in Japanese][in Japanese][in Japanese]
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Abstract

In order to measure void distribution in opaque two-phase flows such as liquid-metal, ultrasonic tomography was developed. In the tomography, the measurement accuracy depends on the number of sensors. However, with increases the number of sensors, the temporal resolution decreases for obtaining a cross-sectional information. Therefore, lower number of sensors is suitable for two-phase flow measurement. In order to reduce the number of sensors, a reflection method was employed for the tomography. An ultrasonic sensors which can emit ultrasonic wave at wide-angle was developed. It was shown that the sensor could emit ultrasonic wave in the angle ranging of ±55°. Furthermore, the sound pressure thickness was almost constant at 4~6 mm. As a result, it was confirmed that echo method could be applied for the tomography algorithm, and it enabled to reduce the number of ultrasonic sensors for the tomography.

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© 2018 The Japan Society of Mechanical Engineers
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