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The development of laser speckle velocimetry for the study of vortical flowsA new experimental technique commonly known as PIDV (particle image displacement velocity) was developed to measure an instantaneous two dimensional velocity fluid in a selected plane of the flow field. This technique was successfully applied to the study of several problems: (1) unsteady flows with large scale vortical structures; (2) the instantaneous two dimensional flow in the transition region of a rectangular air jet; and (3) the instantaneous flow over a circular bump in a transonic flow. In several other experiments PIDV is routinely used as a non-intrusive measurement technique to obtain instantaneous two dimensional velocity fields.
Document ID
19910006976
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Krothapalli, A. (Florida State Univ. Tallahassee, FL, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1991
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
NASA-CR-187756
NAS 1.26:187756
Accession Number
91N16289
Funding Number(s)
CONTRACT_GRANT: NAG2-314
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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