You need JavaScript to view this

Experimental investigation of cavity flows

Abstract

This thesis uses LDV (Laser Doppler Velocimetry), PIV (Particle Image Velocimetry) and Laser Sheet flow Visualisation to study flow inside three different cavity configurations. For sloping cavities, the vortex structure inside the cavities is found to depend upon the flow direction past the cavity. The shape of the downstream corner is a key factor in destroying the boundary layer flow entering the cavity. The experimental results agree well with numerical simulations of the same geometrical configurations. The results of the investigations are used to find the influence of the cavity flow on the accuracy of the ultrasonic flowmeter. A method to compensate for the cavity velocities is suggested. It is found that the relative deviation caused by the cavity velocities depend linearly on the pipe flow. It appears that the flow inside the cavities should not be neglected as done in the draft for the ISO technical report on ultrasonic flowmeters. 58 refs., 147 figs., 2 tabs.
Authors:
Publication Date:
Dec 31, 1998
Product Type:
Thesis/Dissertation
Report Number:
NEI-NO-1080
Reference Number:
SCA: 661300; PA: NW-99:005117; EDB-99:067427; SN: 99002106689
Resource Relation:
Other Information: TH: Thesis (Dr.ing.); PBD: 1998
Subject:
66 PHYSICS; FLUID FLOW; CAVITIES; ACOUSTIC MEASUREMENTS; MEASURING INSTRUMENTS; FLOWMETERS
OSTI ID:
353139
Research Organizations:
Norges teknisk-naturvitenskapelige universitet, Trondheim (Norway)
Country of Origin:
Norway
Language:
English
Other Identifying Numbers:
Other: ON: DE99751218; ISBN 82-471-0283-8; TRN: NO9905117
Availability:
OSTI as DE99751218
Submitting Site:
NW
Size:
167 p.
Announcement Date:

Citation Formats

Loeland, Tore. Experimental investigation of cavity flows. Norway: N. p., 1998. Web.
Loeland, Tore. Experimental investigation of cavity flows. Norway.
Loeland, Tore. 1998. "Experimental investigation of cavity flows." Norway.
@misc{etde_353139,
title = {Experimental investigation of cavity flows}
author = {Loeland, Tore}
abstractNote = {This thesis uses LDV (Laser Doppler Velocimetry), PIV (Particle Image Velocimetry) and Laser Sheet flow Visualisation to study flow inside three different cavity configurations. For sloping cavities, the vortex structure inside the cavities is found to depend upon the flow direction past the cavity. The shape of the downstream corner is a key factor in destroying the boundary layer flow entering the cavity. The experimental results agree well with numerical simulations of the same geometrical configurations. The results of the investigations are used to find the influence of the cavity flow on the accuracy of the ultrasonic flowmeter. A method to compensate for the cavity velocities is suggested. It is found that the relative deviation caused by the cavity velocities depend linearly on the pipe flow. It appears that the flow inside the cavities should not be neglected as done in the draft for the ISO technical report on ultrasonic flowmeters. 58 refs., 147 figs., 2 tabs.}
place = {Norway}
year = {1998}
month = {Dec}
}