Titre : |
Caractérisation expérimentale aérothermique d'un jet pulsé débouchant dans un écoulement transversal : Influence du nombre de Strouhal d'excitation sur le refroidissement de paroi par film |
Type de document : |
thèse |
Auteurs : |
Qaiser SULTAN, Auteur ; Eva DORIGNAC, Directeur de thèse ; Gildas LALIZEL, Directeur de thèse ; Institut PPRIME UPR CNRS 3346 - FTC, Commanditaire ; Béatrice PATTE-ROULAND, Rapporteur ; T. ARTS, Rapporteur ; Ahmed OULD EL MOCTAR, Examinateur ; Jacques BORÉE, Examinateur ; Denis LEMONNIER, Examinateur ; Pierre LAROCHE, Examinateur |
Année de publication : |
2011 |
Importance : |
283 p. |
Note générale : |
NNT 2011ESMA0012
Acknowledgement
Synthèse
Table of contents
Appendices
Mots clés
Résumé |
Langues : |
Anglais (eng) |
Catégories : |
Chaleur:Convection Thermographie Turbulence
|
Résumé : |
INTRODUCTION
Scientific and industrial context
Techniques formaterial protection
Flow field unsteadiness of gas turbine engine
Organization of the manuscript
References
BIBLIOGRAPHICAL REVIEW
Definition of jet-in-crossflow
Description of the aerodynamics of a jet-in-crossflow
Description of aerodynamic and heat transfer of an inclined jet-in-crossflow applied to film cooling
Application of periodic velocity boundary limit on flow structure and wall heat transfer
Conclusion
References
EXPERIMENTAL SETUP AND MEASURING TECHNIQUES
Frame work of experimental measurement
Principle hardware components
Velocity measurement systems
Thermal measurements of film cooling configuration
Data treatments
References
CHARACTERIZATION OF UPSTREAM FLOWS
Velocity characterization of wind tunnel flow
Description of turbulence scales and energy spectra
Temperature description of wind tunnel flow
Characterization of injectant flow
Energy spectra
Comparisons of baseline results
Conclusion
References
STUDY OF THE FILM-COOLED BOUNDARY LAYER FLOW AERODYNAMICS
Structure involved in the flow dynamics
Velocity field
Velocity probability density function (PDF)
Turbulent description, tensor of Reynolds stresses
Tensor of velocity gradient
Vortex identification
Mas, Momentum and energy conservation
Conclusion
References
STUDY OF WALL HEAT TRANSFER IN FILM-COOLED BOUNDARY LAYER FLOW
Steady blowing (no pulsation)
Unsteady blowing (with pulsation)
Centerline and lateraly-averaged effectiveness
Centerline and lateraly-averaged heat transfer coefficient
Net heat flux reduction (NHFR)
Conclusion
References
STUDY OF THE FILM-COOLED BOUNDARY LAYER FLOW TEMPERATURE
Validation of cold wire thermometry to measure fluctuating temperature distribution
Temperature distribution in the central plane (z/d=0)
Temperature distribution at off-centre plane (z/d=1.5)
Skewness adn flatness factor
Conclusion
references
CONCLUSION
Conclusion
Perspective |
En ligne : |
http://tel.archives-ouvertes.fr/tel-00640968/fr/ |
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