Search for dissertations about: "endwall"

Showing result 1 - 5 of 15 swedish dissertations containing the word endwall.

  1. 1. Aerodynamic Investigations of a High Pressure Turbine Vane with Leading Edge Contouring at Endwall in a Transonic Annular Sector Cascade

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Ranjan Saha; Torsten Fransson; Markus Jöcker; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; high pressure turbine; secondary flow; leading edge contouring; endwall; experimental investigations; losses; flow field; hub cooling flow; högtrycksturbinen sekundärströmning; framkantsmodifiering; ändvägg; experimentell undersökning; förluster; strömningsfält; filmkylning av inre platform;

    Abstract : Efficiency improvement is an important aspect to reduce the use of fossil-based fuel in order to achieve a sustainable future. Gas turbines are mainly fossil-fuel based turbomachines, and, therefore, efficiency improvement is still the subject of many on-going research activities in the gas turbine community. READ MORE

  2. 2. Experimental and Numerical Investigations of Heat Transfer related to Gas Turbine Applications

    University dissertation from Department of Energy Sciences, Lund University

    Author : Safeer Hussain; [2019]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; heat transfer; obstacle; vortex generator; pin fins; endwall; Nusselt number; thermal performance; film cooling effectiveness; contouring;

    Abstract : Gas turbines are broadly used in aerospace and marine propulsion and power production etc.Investigation of heat transfer in gas turbines is a long-lasting and still an active subject ofresearch due to its tremendous importance. READ MORE

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

    University dissertation from Stockholm : KTH

    Author : Frank G. Rubensdörffer; Torsten Fransson; Albin Bölcs; [2006]
    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; TECHNOLOGY Engineering mechanics Mechanical and thermal engineering Mechanical energy engineering; TEKNIKVETENSKAP Teknisk mekanik Mekanisk och termisk energiteknik 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

  4. 4. Flow Control and Shape Optimization of Intermediate Turbine Ducts for Turbofan Engines

    University dissertation from Stockholm : KTH

    Author : Fredrik Wallin; [2008]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CFD; response surface methodology; intermediate turbine duct; vortex generators; turbine intermediate case; endwall contouring; turbine center frame; body-force model; shape optimization; mid-turbine frame; flow control;

    Abstract : Demands on improved efficiency, reduced emissions and lowered noise levels cause a strive towards high by-pass ratios of commercial turbofan engines. This results in an increased radial offset between the high- and low-pressure turbines. Thus the design of the intermediate turbine duct connecting the two turbines becomes more challenging. READ MORE

  5. 5. Investigations of Heat Transfer and Fluid Flow in the Pocket Region of a Gas Turbine Engine and Cooling of a Turbine Blade

    University dissertation from Department of Energy Sciences, Lund University

    Author : Jian Liu; [2019-03-18]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; pocket cavity; symmetric vane; Liquid Crystal Thermography; truncated ribs; staggered arrangement; perforated ribs; secondary flows; endwall film cooling; leading edge; turbine vane; coolant coverage;

    Abstract : In the present work, heat transfer within gas turbine applications are investigated bothexperimentally and numerically. The main content concerns heat transfer and fluidflow over the pocket region and cooling of a turbine blade. READ MORE