Development of a flowmeter by using ultrasonic pulsed Doppler method with a de-aliasing method

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420113
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Fluid engineering
• Research Institution: Kobe University
• Principal Investigator: Murakawa Hideki 神戸大学, 工学研究科, 助教 (40467668)
• Co-Investigator(Renkei-kenkyūsha): FURUICHI Noriyuki 産業技術総合研究所, 計測標準研究部, 主任研究員 (10334921)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 流量 / 速度分布 / 超音波 / パルスドップラ法

Outline of Final Research Achievements

A de-aliasing based on the dual PRF, pulse repetition frequency, method was introduced for ultrasonic pulsed Doppler method. Furthermore, a multi-wave ultrasonic method was proposed for the measurement. The higher ultrasonic basic frequency, f0, with smaller beam diameter, DUS, was used for measuring velocity profile near wall region, and the lower f0 with larger DUS was used for measuring velocity profile far from the transducer. For integrating the combined velocity profiles over the pipe, it was shown that the approximately 6 times larger flowrate was accurately obtained compared to by using the conventional pulsed Doppler method.

Free Research Field

混相熱流体