Oil Film Dynamics in Aero Engine Bearing Chambers : Fundamental Investigations and Numerical Modelling.

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Detalles Bibliográficos
Clasificación:Libro Electrónico
Autor principal: Hashmi, Amir A.
Formato: Electrónico eBook
Idioma:Inglés
Publicado: Berlin : Logos Verlag Berlin, 2012.
Colección:Forschungsberichte Aus Dem Institut Für Thermische Strömungsmaschinen Ser.
Temas:
Airplanes > Motors.
Avions > Moteurs.
Airplanes > Motors
Acceso en línea:Texto completo
Tabla de Contenidos:
  • Intro; 1 Introduction
  • Bearing Chambers in Aero Engines; 2 Oil Film Dynamics
  • State of the Art; 2.1 Experimental Investigations; 2.1.1 ITS High Speed Bearing Chamber (HSBC) Test Rig; 2.1.2 Stratified Flow Test Rigs; 2.2 Numerical Investigations; 2.2.1 Film Flow Modelling in Bearing Chamber (Similar) Geometries; 2.2.2 Stratified Flow Modelling; 2.2.3 Summary of Film Flow Modelling; 3 Problem Definition and Concretization of Objectives; 3.1 Problem Definition; 3.2 Scope of the Thesis; 3.3 Concretization of Objectives; 4 Experimental Investigations of Thick Film Flows.
  • 4.1 Stratified Flow Test Rig4.1.1 Test Rig Design and Boundary Conditions; 4.1.2 Definition of a New Validation Parameter; 4.2 Experimental Results and Discussion; 4.2.1 Experimental Procedure; 4.2.2 Reproducibility Study; 4.2.3 Co-Current Flow Regime; 4.2.4 Counter-Current Flow Regime; 4.3 Significance of the Generic Results in a Bearing Chamber Environment; 4.4 Characterization of Bearing Chamber Typical Oil Film Flows; 5 Modelling of Shear Driven Thick Film Flows; 5.1 Multiphase Modelling Techniques; 5.1.1 Two-Fluid Model; 5.1.2 Homogenous Model; 5.1.3 Model Selection.
  • 5.2 Multiphase Turbulence Modelling5.2.1 Selection of a Turbulence Model; 5.2.2 Two-Equation Turbulence Models; 5.3 Application of the VOF Model to Thick Film Flows; 5.3.1 Investigation of the Model Failure; 5.3.2 Turbulence Model Behaviour near the Interface; 5.4 Improved VOF Model; 5.4.1 Previous Approaches; 5.4.2 Interface Treatment Method; 6 Simulation Results and Discussion; 6.1 Test Case #1
  • High Viscosity Liquid; 6.2 Test Case #2
  • ITS Stratified Flow Test Rig; 6.2.1 Effect of Shearing Gas Flow; 6.2.2 Effect of Gravity; 6.2.3 Effect of Film Properties.
  • 7 Application Oriented Test Case
  • ITS HSBC Test Rig7.1 Experimental Setup; 7.2 Simulation Setup; 7.3 Validation and Analysis; 8 Summary and Outlook.

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