Search for dissertations about: "field vane test"

Showing result 1 - 5 of 7 swedish dissertations containing the words field vane test.

2. 1. Undrained shear strength in clay slopes - Influence of stress conditions. A model and field test study

   Author : Hjördis Löfroth; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; preconsolidation pressure; piezocone test; slope; model test; consolidation; horizontal stress; clay; undrained shear strength; direct simple shear test; field vane test; field test;

   Abstract : To counteract natural hazards such as landslides, current methods for evaluation of soil properties as a mean for determining the safety level of natural slopes need to be refined. The empirical relationships used for estimation of the undrained shear strength from piezocone and field vane test are based on the stress conditions valid for horizontal ground and normally consolidated or slightly overconsolidated soil. READ MORE

4. 2. Turbine Outlet Guide Vane Flows

   Author : Johan Hjärne; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Spalart-Allmaras model; k-ω SST model; linear cascade; secondary flows; turbine exhaust casing; RSM; k-ε realizable model; turbine rear frame; engine mount bump; tail bearing housing; Outlet guide vane;

   Abstract : New design goals on modern jet engines often leads to more highly loaded turbines with fewer stages in order to save weight and cost. This gives higher swirl angles into the outlet guide vane (OGV), implying a more difficult aerodynamic design. READ MORE

5. 3. Numerical and Experimental Investigations of Design Parameters Defining Gas Turbine Nozzle Guide Vane Endwall Heat Transfer

   Author : Frank G. Rubensdörffer; Torsten Fransson; Albin Bölcs; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Turbomachinery; secondary flow; endwall heat transfer; linear cascade test facility; CFD; RANS; V2F turbulence model; combustion chamber nozzle guide vane interface; heat shield; cavity; cooling air; Mechanical energy engineering; Mekanisk energiteknik;

   Abstract : The primary requirements for a modern industrial gas turbine consist of a continuous trend of an increasing efficiency combined with very low emissions in a robust, cost-effective manner. To fulfil these tasks a high turbine inlet temperature together with advanced dry low NOX combustion chambers are employed. READ MORE

6. 4. The Influence of Flow Leakage Modelling on Turbomachinery Blade Forcing Predictions

   Author : Tobias Gezork; Björn Laumert; Paul Petrie-Repar; Damian Vogt; Mehdi Vahdati; KTH; []
   Keywords : Energiteknik; Energy Technology;

   Abstract : Vibrations in turbomachinery engine components are undesirable as they put the structural integrity of the components at risk and can lead to failure during the lifetime of the turbomachinery engine. Vibrations arising from aerodynamic forces and stability of turbomachinery blades is assessed in the discipline of aeromechanics. READ MORE

7. 5. Numerical Investigation of Aerodynamic Blade Excitation Mechanisms in Transonic Turbine Stages

   Author : Björn Laumert; KTH; []
   Keywords : Transonic Turbines; CFD; Forced Response; Unsteady Aerodynamics;

   Abstract : With the present drive in turbomachine engine developmenttowards thinner and lighter bladings, closer spaced blade rowsand higher aerodynamic loads per blade row and blade, advanceddesign criteria and accurate prediction methods for vibrationalproblems such as forced response become increasingly importantin order to be able to address and avoid fatigue failures ofthe machine early in the design process. The present worksupports both the search for applicable design criteria and thedevelopment of advanced prediction methods for forced responsein transonic turbine stages. READ MORE