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Fluid Flow and Thermal Engineering Chair / Foundation Antonio Aranzábal-University of Navarra

FLUID FLOW AND THERMAL

ENGINEERING CHAIR

FOUNDATION ANTONIO ARANZABAL

- UNIVERSITY OF NAVARRA

TECNUN – ENGINEERING SCHOOL

TECHNOLOGICAL CAMPUS OF THE UNIVERSITY

OF NAVARRA


PRESENTATION (I)

University of Navarra

IESE (MBA) Madrid

Main Campus

Pamplona

TECNUN - Engineering School San Sebastián

IESE (MBA) Barcelona


PRESENTATION (II)

• Human Resources:– 2 Main Researchers (Ph. D.).– 5 Research Engineers (Ph. D. students).

• Facilities:– Fluid Flow and Heat Transfer Laboratories.– 25 PC network with parallel computing capacity.– 10 PC cluster.– Software:

• Fluent, Femlab, Matlab.


RESEARCH LINES AND PROJECTS

• Application of CFD and experimental techniques to model and simulate systems involving fluid flow and thermal phenomena.

• Applied research projects:– To provide industrial companies with user-oriented

simulation tools to solve their problems, and to optimise their processes and products.

• Basic research projects:– To study in depth the knowledge basis of fluid flow

and thermal phenomena in order to carry out doctoral thesis and to form new researchers.


Project Data: Date: 2000 - 2006. Sponsor: Basque Government and Elster Iberconta S.A. Participants: CAA-UN. Status: In progress. Publications: G. Sánchez and A. Rivas, Computational Fluid

Dynamics approach to the design of a single-jet water-meter, PEDS 2003.

Researchers: A. Rivas and G. Sánchez.

General Description and Objectives:

Application of CFD techniques to optimise water-meter design.

TURBOMACHINERY DESIGN THROUGH CFD

APPLIED TO WATER-METERS




• Numerical modelling of a single-jet water-meter:– To study in depth the complex interaction between

the turbine and the water flow.




• Obtained Results:– Flow Characteristics.– Rotational speed of the turbine.

0

20

40

60

80

100

120

140

160

180

200

0 500 1000 1500 2000 2500 3000

Flow Rate (l/h)

Ro

tati

on

al

Sp

ee

d (

rad

/s)

Experimental

Calculated


Project Data: Date: May 2004 - April 2006. Sponsor: Basque Government and Goizper Soc. Coop. Participants: CAA-UN and Olaker. Status: In progress. Publications: A. Rivas, G. Sánchez, A. Estévez and J. C. Ramos,

Improving the design of fan spray atomizers through Computational Fluid Dynamics techniques, ILASS 2005.

Researchers: A. Rivas, J. C. Ramos, A. Estévez and G. Sánchez.


Application of CFD modelling and simulation, and experimental techniques to analyse the influence of atomizer design in the spray characteristics.

ANALYSIS AND OPTIMIZATION OF THE HYDRAULIC

BEHAVIOUR OF FAN SPRAY ATOMIZERS




• Numerical modelling of internal flow:– To analyse the influence of the atomizer design

parameters in the flow pattern, the turbulence, the spray angle and the velocity distribution at the outlet.




• Numerical modelling of the sheet:– To obtain the morphology of the sheet, and the

liquid-gas phases interaction that provokes the break-up and the formation of the spray.


• Experimental setup:




• High speed images:– To analyse the development, morphology and

break-up mechanisms of the sheet, and the formation of the spray.




• Interferometry images:– To measure the thickness of the sheet.




DEVELOPMENT OF A SIMPLIFIED THERMAL MODEL OF POWER

TRANSFORMERS USED IN TRANSFORMER SUBSTATIONS

Project Data: Date: March 2005 - February 2007. Sponsor: Ormazabal Corporate Technology. Participants: CAA-UN, ESI Bilbao and Ormazabal. Status: In progress. Publications: J. C. Ramos, A. Rivas and J. M. Morcillo, Numerical

thermal modelling of the natural ventilation of a half-buried transformer substation using CFD techniques, ICCHMT 2005.

Researchers: J. C. Ramos, A. Rivas and J. Gastelurrutia.


Development of a simplified model of a power transformer working inside a substation to predict the hot spot temperature.




• In a previous work the substation air flow was modelled to obtain the flow pattern, and the velocity and temperature distributions.




• Modelling of the transformer oil flow to obtain the flow pattern, and the velocity and temperature distributions.




• Obtaining of the main parameters to develop the simplified model.


FLOW INDUCED NOISE AND VIBRATION MODELLING IN

THE TRANSPORTATION INDUSTRY (WINDY)

Project Data: Date: January 2003 - January 2006. Sponsor: European Union, Eureka Project E!3020. Participants: LMS International (Belgium), K. U. Leuven (Belgium),

Mcube (France), CEIT (Spain) and CAA-UN (Spain). Status: In progress. Publications: A. Pradera, A. Rivas, N. Gil-Negrete, J. Viñolas and C.

Schram, Numerical Prediction of the Aerodynamic Noise Radiated by a Centrifugal Fan, 12th International Congress on Sound and Vibration, Lisbon, 11-14 July 2005.

Researchers: A. Rivas.


Numerical simulation of the interaction between fluid dynamics and acoustics.


FLOW INDUCED NOISE AND VIBRATION MODELLING IN

THE TRANSPORTATION INDUSTRY (WINDY)

Contours of Velocity Magnitude (m/s) (Time=9.9430e-02)FLUENT 6.1 (3d, segregated, LES, unsteady)

Feb 17, 2005

1.46e+02

1.39e+02

1.31e+02

1.24e+02

1.17e+02

1.09e+02

1.02e+02

9.48e+01

8.75e+01

8.02e+01

7.29e+01

6.56e+01

5.83e+01

5.10e+01

4.37e+01

3.65e+01

2.92e+01

2.19e+01

1.46e+01

7.29e+00

0.00e+00ZY

X


BEHAVIOUR OF SEVERAL RAILWAY CAB AIR

VENTS DESIGNSProject Data: Date: 2002 - 2003. Sponsor: CAF S. A. Participants: CAA-UN. Status: Finished. Researchers: A. Rivas and G. Sánchez.


To analyse the head loss and solid particles retention capacity of several railway cab air vent designs.


BEHAVIOUR OF SEVERAL RAILWAY CAB AIR

VENTS DESIGNS


THERMAL MODEL OF AUTOMOTIVE TWIN-TUBE

SHOCK ABSORBERSProject Data: Date: 2002 - 2003. Sponsor: AP Amortiguadores S. A. Participants: CAA-UN and AP Amortiguadores S. A. Status: Finished. Publications: J. C. Ramos, A. Rivas et al., Development of a thermal

model for automotive twin-tube shock absorbers, Applied Thermal Engineering, 25 (2005), 1836-1853.

Researchers: J. C. Ramos and A. Rivas.


Simulation of temperature changes over time of shock absorber components during a thermostability test.


THERMAL MODEL OF AUTOMOTIVE TWIN-TUBE

SHOCK ABSORBERS

0 1000 2000 3000 4000 500025

30

35

40

45

50

55

60

65

tiempo (s)

Te

mp

era

tura

(ºC

)

Amort. n.º 1

experimentalmodelo


HYDROBUSHING MODELLING

Project Data: Date: 2001 - 2002. Sponsor: CMP S. A. Participants: CAA-UN and CEIT. Status: Finished. Publications: N. Gil-Negrete, A. Rivas and J. Viñolas, Predicting the

dynamic behaviour of hydrobushings, Shock and Vibration, 12 (2) 2005, 91-107.

Researchers: A. Rivas.


To complete a dynamic model of a hydrobushing in order to analyse the hydraulic characteristics of the channels which are built inside it.


HYDROBUSHING MODELLING

• The oil flow through the inertia track is calculated in FLUENT to predict the dynamic stiffness of the hydrobushing.


STUDY OF A HYDROSTATIC BEARING USING

CFD TECHNIQUESProject Data: Date: 2001 - 2002. Sponsor: CAA-UN and Fatronik S. A. Participants: CAA-UN. Status: Finished. Publications: M. Coito, A. Rivas and G. Sánchez, Numerical analysis

of a radial hydrostatic bearing using Computational Fluid Dynamic techniques, CMFF 2003.

Researchers: A. Rivas, M. Coito and G. Sánchez.


To evaluate the hydrostatic and hydrodynamic forces in a radial hydrostatic bearing taking into account the oil flow and the heat transfer.


STUDY OF A HYDROSTATIC BEARING USING

CFD TECHNIQUES


SIMULATION OF THE NATURAL CONVECTION FLOW

INSIDE A HEATING SYSTEM OF A RAILWAY CAB

Project Data: Date: 2001 - 2002. Sponsor: CAF S. A. Participants: CAA-UN. Status: Finished. Researchers: A. Rivas and G. Sánchez.


To obtain the temperature distribution in the heating system casing of a railway cab by mathematical modelling and simulation of the air flow and the heat transfer (conduction, convection and radiation).


SIMULATION OF THE NATURAL CONVECTION FLOW

INSIDE A HEATING SYSTEM OF A RAILWAY CAB

Temperature (ºC)Velocity (m/s)

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