2010 Fiscal Year Final Research Report

Development of ultrasonic velocity profile method for multi-phase flow using liquid-gas separation technique based on the nonlinear reflected signal

Research Project

Project/Area Number	21760132
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Single-year Grants
Research Field	Fluid engineering
Research Institution	Kobe University
Principal Investigator	MURAKAWA Hideki Kobe University, 大学院・工学研究科, 助教 (40467668)
Project Period (FY)	2009 – 2010
Keywords	流体計測 / 超音波流速分布計測法 / ドップラ法 / 気液二相流 / 混相流動
Research Abstract	A system of ultrasonic velocity profiler was developed by using an ultrasonic pulser/receiver, a high-speed digitizer and a PC. Velocity distributions in single-phase flow could be measured accurately by using the system. It was shown that the identification of liquid-gas interface was possible based on the phase change of the reflected signal on the interface. The system could be synchronized with a high-speed camera, and it was shown that the liquid velocity distributions around a bubble could be measured by using the developed system.