Development of a Dual-Beam Sweep Particle Image Velocimeter Using an Extended Search Region Algorithm.
Abstract
Particle image velocimetry (PIV) is a two-step fluid velocimetry technique which is able to capture 2-D qualitative as well as quantitative velocity information at many points instantaneously with respect to the relevant time scales of the flow field. A pulsing laser light sheet is used in conjunction with an image recording device to record images of fluid embedded particles on one multi-exposed image frame or on successive individual image frames separated by time At. Utilizing 2-D statistical techniques on numerous small regions within the image frame, the average particle displacement, hence the average velocity, within each region is determine. A dual-beam-sweep PIV system, DBS-PIV, utilizing two continuous-beam Argon-ion lasers, was constructed primarily from existing components to avoid the need to fabricate or purchase major parts. Dual-beam-sweep PIV was chosen because of its use of available continuous-beam lasers and its ability to resolve moderately high velocity flow fields.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1998
- Accession Number
- ADA345010
Entities
People
- Gregory A. Meyer
Organizations
- Pennsylvania State University