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Title: Optical diagnostics for turbulent and multiphase flows: Particle image velocimetry and photorefractive optics

This report summarizes the work performed under the Sandia Laboratory Directed Research and Development (LDRD) project ``Optical Diagnostics for Turbulent and Multiphase Flows.`` Advanced optical diagnostics have been investigated and developed for flow field measurements, including capabilities for measurement in turbulent, multiphase, and heated flows. Particle Image Velocimetry (PIV) includes several techniques for measurement of instantaneous flow field velocities and associated turbulence quantities. Nonlinear photorefractive optical materials have been investigated for the possibility of measuring turbulence quantities (turbulent spectrum) more directly. The two-dimensional PIV techniques developed under this LDRD were shown to work well, and were compared with more traditional laser Doppler velocimetry (LDV). Three-dimensional PIV techniques were developed and tested, but due to several experimental difficulties were not as successful. The photorefractive techniques were tested, and both potential capabilities and possible problem areas were elucidated.
Authors:
; ; ; ; ; ;
Publication Date:
OSTI Identifier:
446382
Report Number(s):
SAND--94-2589
ON: DE97004360; TRN: AHC29706%%88
DOE Contract Number:
AC04-94AL85000
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Jan 1997
Research Org:
Sandia National Labs., Albuquerque, NM (United States)
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; DIAGNOSTIC TECHNIQUES; TURBULENT FLOW; MULTIPHASE FLOW; VELOCIMETERS; FLOW VISUALIZATION; OPTICAL SYSTEMS; COMPARATIVE EVALUATIONS