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Laser measurements on two-component flow using the crossed beam cross-correlation method

Technical Report:

Abstract

The crossed beam cross-correlation method offers the possibility to measure flow parameters locally and non-intrusively, within a two-component flow. This is achieved by evaluating the cross-correlation function from two signals, which have been formed by modulation of two, within the flow, crossing radiation beams. The modulation is caused by a binary, stochastic variation of some parameter (e.g. density) in the flow, affecting the radiation beam in some measurable way. Using this method, three important two-component flow parameters can be determined simultaneously: (1) Disturbance (e.g. void) fraction, (2) interfacial velocity and (3) maximum disturbance (e.g. bubble) size. A number of experiments have been performed in order to verify the theoretical expectations on the crossed beam cross-correlation method. In the described experiments, laser beams have been used as information carriers and the two-component flow has consisted of either solid particles falling in air or water with air bubbles. The results from these experiments look very promising and, at least for the examined cases, it can be stated that the method really works. An overview of the formerly presented, general principle of the crossed beam cross-correlation method is given and a newly developed theory for applications using laser beams is presented in detail.  More>>
Authors:
Publication Date:
Nov 01, 1993
Product Type:
Technical Report
Report Number:
CTH-RF-99
Reference Number:
SCA: 430400; 440800; PA: AIX-26:006248; EDB-95:009487; SN: 95001299359
Resource Relation:
Other Information: PBD: Nov 1993
Subject:
43 PARTICLE ACCELERATORS; 47 OTHER INSTRUMENTATION; MEASURING INSTRUMENTS; TWO-PHASE FLOW; MEASURING METHODS; GAS FLOW; LASERS; LIQUID FLOW; 430400; 440800; STORAGE RINGS; MISCELLANEOUS INSTRUMENTATION
OSTI ID:
10102932
Research Organizations:
Chalmers Univ. of Technology, Goeteborg (Sweden). Dept. of Reactor Physics
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0281-9775; Other: ON: DE95610127; TRN: SE9400170006248
Availability:
OSTI; NTIS; INIS
Submitting Site:
SWDN
Size:
24 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Thomson, O. Laser measurements on two-component flow using the crossed beam cross-correlation method. Sweden: N. p., 1993. Web.
Thomson, O. Laser measurements on two-component flow using the crossed beam cross-correlation method. Sweden.
Thomson, O. 1993. "Laser measurements on two-component flow using the crossed beam cross-correlation method." Sweden.
@misc{etde_10102932,
title = {Laser measurements on two-component flow using the crossed beam cross-correlation method}
author = {Thomson, O}
abstractNote = {The crossed beam cross-correlation method offers the possibility to measure flow parameters locally and non-intrusively, within a two-component flow. This is achieved by evaluating the cross-correlation function from two signals, which have been formed by modulation of two, within the flow, crossing radiation beams. The modulation is caused by a binary, stochastic variation of some parameter (e.g. density) in the flow, affecting the radiation beam in some measurable way. Using this method, three important two-component flow parameters can be determined simultaneously: (1) Disturbance (e.g. void) fraction, (2) interfacial velocity and (3) maximum disturbance (e.g. bubble) size. A number of experiments have been performed in order to verify the theoretical expectations on the crossed beam cross-correlation method. In the described experiments, laser beams have been used as information carriers and the two-component flow has consisted of either solid particles falling in air or water with air bubbles. The results from these experiments look very promising and, at least for the examined cases, it can be stated that the method really works. An overview of the formerly presented, general principle of the crossed beam cross-correlation method is given and a newly developed theory for applications using laser beams is presented in detail. The experimental set-up and results are described and finally, a discussion on further developments of the method is given. 10 refs, 18 figs, 8 tabs.}
place = {Sweden}
year = {1993}
month = {Nov}
}