Development of ultrasonic transducer for measurement of high temperature liquid metal flow by using acoustic wave guide

Obayashi, Hironari  ; Kikuchi, Kenji; Tezuka, Masao

UVP is a powerful tool to measure an instantaneous space-time velocity profile especially on a velocity measurement of an opaque liquid flow, such as liquid metal. However, velocity measurement of high temperature liquid metal flow has not yet been done well because development of high-sensitive ultrasonic transducer used under the high temperature conditions more than 500 degrees centigrade is not enough. In this study, we proposed the transducer system that has the acoustic wave guide a measure devised to deal with this problem and evaluated materials to use for a wave guide by numerical calculation.