IROV holographic particle image velocimetry for 3D turbulent flow measurement

Book · Sat Dec 30 23:00:00 EST 1995

OSTI ID:220757

Meng, H ^[1]; Hussain, F ^[2]

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1. Kansas State Univ., Manhattan, KS (United States). Mechanical Engineering Dept.
2. Univ. of Houston, TX (United States). Mechanical Engineering Dept.

Holographic particle image velocimetry (HPIV) encounters problems such as intrinsic speckle noise, external noise and aberration, and practical restrictions in test flow volume or media. The novel technique, in-line recording off-axis viewing (IROV), uses a single laser beam to record a hologram which is then viewed off axis during reconstruction. It combines advantages of both inline and off-axis holography, achieving high spatial information capacity, low noise, and practicality. Instantaneous velocity vector field in the three-dimensional (3D) flow of an unstable vortex ring in water has been measured by IROV. The vorticity distribution and circulation as a function of radius from the vortex core center are extracted from the 3D velocity field.

• OSTI ID: 220757
• Report Number(s): CONF-950793--; ISBN 0-8194-1905-2
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
DATA ANALYSIS
DESIGN
DIAGNOSTIC TECHNIQUES
EXPERIMENTAL DATA
HOLOGRAPHY
IMAGE PROCESSING
MEASURING METHODS
OPTICAL SYSTEMS
TURBULENT FLOW
VELOCIMETERS
VELOCITY