E204 超音波パルスドップラー式流速分布計測法を利用した管路内流速分布及び流量計測実験(OS-10 混相流動(2),一般講演,地球温暖化防止と動力エネルギー技術)

概要

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In order to improve thermal efficiency and optimize plant operation at electric power plants, ultrasonic pulse Doppler method is being developed to attain the high accuracy in flow rate measurements. Ultrasound waves are emitted into fluid from ultrasonic transducer mounted on the outer surface of a pipe. Waves are bounced back at the surface of ultrasound reflectors flowing in fluid. By detecting Doppler shift frequency of those waves, velocity profiles along the ultrasound beam path can be obtained. Integration of those instantaneous velocity profiles gives us the flow rate in a pipe. In this report, the series of velocity profile measurements are summarized with field tests at an actual power plant for the downstream of an elbow with micro bubbles generated for ultrasonic reflectors.
社団法人日本機械学会の論文
2008-06-18