The velocity field inside a new concept of heat exchanger, which is a component of a high protons linear accelerator, is investigated experimentally in order to validate the design. A full scale facility with optical accesses is used for the measurements by particle image velocimetry. The choice of the technique is set by the three-dimensional and strongly unsteady structure of the flow. A filtering procedure is applied to the recorded images before processing the velocity field with an optical flow algorithm using dynamical programming. The distribution of the velocity between the different tubes of the heat exchanger shows a large scatter of flow rate between these tubes. In addition, the turbulence characteristics are presented.

Issue Section:
Technical Papers
Keywords:
heat transfer, pipe flow, flow visualisation, turbulence, image sequences, dynamic programming, linear accelerators
Topics:
Flow (Dynamics), Heat exchangers, Turbulence, Particulate matter
1.
Idel’cik
,
I. E.
, 1986, “
Memento des Pertes de Charges
” (French translation from Russian) Eyrolles, Paris.
2.
Pedley
,
T. J.
,
Schroter
,
R. C.
, and
Sudlow
,
M. F.
, 1971, “
Flow and Pressure Drop in Systems of Repeatedly Branching Tubes
,”
J. Fluid Mech.
0022-1120,
46
(
2
), pp.
365
–
383
.
Crossref
Search ADS
 
3.
Pedley
,
T. J.
, 1977, “
Pulmonary Fluid Dynamics
,”
Annu. Rev. Fluid Mech.
0066-4189,
9
, pp.
229
–
274
.
Crossref
Search ADS
 
4.
Alharbi
,
A. Y.
,
Pence
,
D. V.
, and
Cullion
,
R. N.
, 2003, “
Fluid Flow Through Microscale Fractal-Like Branching Channel Networks
,”
ASME J. Fluids Eng.
0098-2202,
125
, pp.
1051
–
1057
.
Crossref
Search ADS
 
5.
Haselton
,
F. R.
, and
Scherer
,
P. W.
, 1982, “
Flow Visualization of Steady Streaming in Oscillatory Flow Through a Bifurcating Tube
,”
J. Fluid Mech.
0022-1120,
123
, pp.
315
–
333
.
Crossref
Search ADS
 
6.
Manga
,
M.
, 1996, “
Dynamics of Drops in Branched Tubes
,”
J. Fluid Mech.
0022-1120,
315
, pp.
105
–
117
.
Crossref
Search ADS
 
7.
Comer
,
J. K.
,
Kleinstreuer
,
C.
, and
Zhang
,
Z.
, 2001, “
Flow Structures and Particle Deposition Patterns in Double-Bifurcation Airway Models. Part 1: Air Flow Fields
,”
J. Fluid Mech.
0022-1120,
435
, pp.
25
–
54
.
Crossref
Search ADS
 
8.
Zhang
,
Z.
,
Kleinstreuer
,
C.
, and
Kim
,
C. S.
, 2002, “
Gas-Solid Two-Phase Flow in a Triple Bifurcation Lung Airway Model
,”
Int. J. Multiphase Flow
0301-9322,
28
, pp.
1021
–
1046
.
Crossref
Search ADS
 
9.
Corieri
,
P.
, 1994, “
Experimental and Numerical Investigation of Flows in Bifurcations Within the Lung Airways
,” Ph.D. thesis, Université Libre de Bruxelles.
10.
Ramuzat
,
A.
, and
Riethmuller
,
M. L.
, 2002, “
Étude Expérimentale des Écoulements Oscillatoires dans un Modèle de Bifurcations Multiples Tridimensionnel
,” 8ème Congrès Francophone de Vélocimétrie Laser, Orsay (France), Sept. 17–20, pp.
125
–
130
.
11.
Ramuzat
,
A.
, 2002, “
Techniques de Mesures Non-invasives Appliquées aux Écoulements Biologiques: Étude des Bifurcations Pulmonaires Successives
,” Ph.D. thesis, von Karman Institute for Fluid Dynamics and Université Paris XII Val de Marne.
12.
Theunissen
,
R.
,
Corieri
,
P.
, and
Riethmuller
,
M. L.
, 2004, “
Application de la PTV à la Modélisation d’Écoulements d’Aérosols dans les Voies Aériennes Pulmonaires
,” 9ème Congrès Francophone de Vélocimétrie Laser, Brussels (Belgium), Sept. 14–17, pp.
K.5.1
–
K.5.9
.
13.
Ku
,
D. N.
, 1997, “
Blood Flow in Arteries
,”
Annu. Rev. Fluid Mech.
0066-4189,
29
, pp.
399
–
434
.
Crossref
Search ADS
 
14.
Rieu
,
R.
,
Pelissier
,
R.
, and
Farahifar
,
D.
, 1989, “
An Experimental Investigation of Flow Characteristics in Bifurcation Models
,”
Eur. J. Mech. B/Fluids
0997-7546,
8
(
1
), pp.
73
–
101
.
15.
Ethier
,
C. R.
,
Prakash
,
S.
,
Steinman
,
D. A.
,
Leask
,
R. L.
,
Couch
,
G. G.
, and
Ojha
,
M.
, 2000, “
Steady Flow Separation Patterns in a 45 Degree Junction
,”
J. Fluid Mech.
0022-1120,
411
, pp.
1
–
38
.
Crossref
Search ADS
 
16.
Kubilay
,
E.
, 1982, “
Répartition du Débit et Pertes de Charge Singulières d’un Absorbeur Solaire Tubulaire
,” Ph.D. thesis, Université Pierre et Marie Curie, Paris VI.
17.
Nikolaidis
,
N. M.
, and
Mathioulakis
,
D. S.
, 2002, “
Axial and Secondary Flow Study in a 90deg Bifurcation Under Pulsating Conditions Using PIV
,”
ASME J. Fluids Eng.
0098-2202,
124
, pp.
505
–
511
.
Crossref
Search ADS
 
18.
Quénot
,
G. M.
, 1992, “
The Orthogonal Algorithm for Optical Flow Detection Using Dynamic Programming
,”
Proc. IEEE
0018-9219,
III
, pp.
249
–
252
.
19.
Quénot
,
G. M.
,
Pakleza
,
J.
, and
Kowalewski
,
T. A.
, 1998, “
Particle Image Velocimetry With Optical Flow
,”
Exp. Fluids
0723-4864,
25
(
3
), pp.
177
–
189
.
20.
Faure
,
T. M.
,
Lusseyran
,
F.
,
Gougat
,
P.
, and
Launay
,
F.
, 2004, “
Exploration de l’Écoulement dans un Échangeur de Chaleur Tubulaire par Vélocimétrie par Images de Particules
,” 9ème Congrès Francophone de Vélocimétrie Laser, Brussels (Belgium), Sept. 14–17, pp.
K.4.1
–
K.4.8
.
21.
Rémy
,
D.
, and
Buisine
,
D.
, 2005, “
Caractérisation à l’Aide de la Tomographie et de la PIV d’une Structure Spirale Apparaissant dans une Cavité Rotor-Stator Aspirée
,” Actes du Colloque FLUVISU 11, June 7–9, Ecully (France).
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