混相流計測に適用可能な超音波流速分布計測システムの開発

抄録

Ultrasonic Velocity Profiler; UVP method is applied to various fluid flows including the multiphase flow. Most UVP measurements were carried out using the commercial measurement devices. However, a flexibility of measurements is restricted due to that fact. This article discusses development of UVP measurement system. The system consists of a pulser/receiver, an ultrasonic transducer, an analog-to-digital converter and a PC. Selection guide of hardware is provided. Velocity estimation is performed with full-digital signal processing, which eliminates complicated adjustment of analog circuits as it used to be. Typical signal processing principle and its efficient implementation are discussed. Bubbly flow measurement using this system is presented as an example of application.