Synchronous high speed multi-point velocity profile measurement by heterodyne interferometry

This paper presents a velocity profile measurement technique using a ultrasound time-domain correlation method (UTDC). The system is based on the cross correlation between two consecutive echoes of ultrasonic pulses to detect the velocity. The UTDC has two advantages over a conventional ultrasound pulse Doppler method. First, the system has a higher time resolution than the pulse Doppler method. Second, the system does not have a limitation in maximum measurable velocity, which is limited by Nyquist’s sampling theorem. In this paper, the velocity profile measurement in turbulent pipe flow using the UTDC is performed.

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VELOCITY PROFILE MEASUREMENT BY ULTRASONIC DOPPLER METHOD

Experimental Heat Transfer, Fluid Mechanics and Thermodynamics 1993 ◽

10.1016/b978-0-444-81619-1.50012-5 ◽

1993 ◽

pp. 126-131 ◽

Cited By ~ 1

Author(s):

Yasushi Takeda

Keyword(s):

Velocity Profile ◽

Profile Measurement ◽

Doppler Method ◽

Velocity Profile Measurement

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Glow Discharge-Tracer Technique for Velocity Profile Measurement in Hypersonic Boundary Layer Flows

JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES ◽

10.2322/jjsass.53.154 ◽

2005 ◽

Vol 53 (615) ◽

pp. 154-159 ◽

Cited By ~ 7

Author(s):

Hajime Itoh

Keyword(s):

Boundary Layer ◽

Glow Discharge ◽

Velocity Profile ◽

Profile Measurement ◽

Hypersonic Boundary Layer ◽

Tracer Technique ◽

Boundary Layer Flows ◽

Velocity Profile Measurement

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A Study of Phased Array Ultrasonic Velocity Profile Monitor for Flow Rate Measurement

Volume 6: Beyond Design Basis Events; Student Paper Competition ◽

10.1115/icone21-16601 ◽

2013 ◽

Cited By ~ 3

Author(s):

Takuya Fukumoto ◽

Keisuke Tsukada ◽

Tomonori Ihara ◽

Nobuyoshi Tsuzuki ◽

Hiroshige Kikura

Keyword(s):

Velocity Profile ◽

Ultrasonic Velocity ◽

Flow Rate ◽

Measurement System ◽

Phased Array ◽

Profile Measurement ◽

Multiple Reflections ◽

Horizontal Pipe ◽

Array Sensor ◽

Velocity Profile Measurement

A new ultrasonic velocity profile measurement system with a phased array sensor was developed for accurate flow rate measurements. This measurement system employs phased array technique to reduce noise from multiple reflections which occurs in a wedge. However, phased array technique has some difficulties — one of them is about grading lobes. Thus, the array sensor was designed to reduce the grading lobes using simple calculations. Performance of the manufactured array sensor was evaluated by experimental measurements of sound pressure distribution emitted from the array sensor, and optimal parameters to control the array sensor were obtained. Hardware and software of the ultrasonic velocity profile measurement system with a phased array sensor were also developed. The software is based on ultrasonic Doppler method. Velocity profiles of horizontal pipe flow were measured using the developed system, and the availability of the system applying a phased array sensor was confirmed.

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