Two-dimensional ultrasound Doppler velocimeter for flow mapping of unsteady liquid metal flows

被引：26

作者：

Franke, S. ^{[1
]}

Lieske, H. ^{[1
]}

Fischer, A. ^{[1
]}

Buettner, L. ^{[1
]}

Czarske, J. ^{[1
]}

Raebiger, D. ^{[2
]}

Eckert, S. ^{[2
]}

机构：

[1] Tech Univ Dresden, Fac Elect Engn & Informat Technol, Lab Measurements & Testing Technol, D-01062 Dresden, Germany

[2] Helmholtz Zentrum Dresden Rossendorf, Inst Fluid Dynam, Dept Magnetohydrodynam, D-01314 Dresden, Germany

来源：

ULTRASONICS | 2013年 / 53卷 / 03期

关键词：

Ultrasound Doppler velocimetry; Flow field measurements; Ultrasound flow mapping; Liquid metal flows; Rotating magnetic field; ROTATING MAGNETIC-FIELD; VELOCITY PROFILE; MERCURY FLOW; COLUMN; SYSTEM;

D O I：

10.1016/j.ultras.2012.10.009

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

We present a novel pulsed-wave ultrasound Doppler system for fluid flow investigations being able to determine two-dimensional vector fields of flow velocities. Electromagnetically-driven liquid metal flows appear as an attractive application field for such a measurement system. Two linear ultrasound transducer arrays each equipped with 25 transducer elements are used to measure the flow field in a square plane of 67 x 67 mm(2). The application of advanced processing methods as a multi-beam operation, an interlaced echo signal acquisition and a segmental array technique enable high data acquisition rates and concurrently a high spatial resolution, which have not been obtained so far for flow measurements in liquid metals. The extended pulsing strategy and essential operation principles such as the multiplexing electronic concept will be presented within this paper. The capabilities of the measuring system make it suitable for investigations of non-transparent, turbulent flows. Here, we present measurements of liquid metal flows driven by a rotating magnetic field for demonstration purposes. The measuring setup realized here reveals details of the swirling fluid motion in a horizontal section of a cube. Frame acquisition rates up to 30 fps were achieved for a complete two-dimensional flow mapping. (C) 2012 Elsevier B. V. All rights reserved.

引用

页码：691 / 700

页数：10

共 29 条

[1] Application of the ultrasonic velocity profile method to the mapping of liquid metal flows under the influence of a non-uniform magnetic field [J].