Search for dissertations about: "cascade test"

Showing result 1 - 5 of 35 swedish dissertations containing the words cascade test.

  2. 1. Carbon Dioxide in Supermarket Refrigeration

    Author : Samer Sawalha; Björn Palm; Eckhard Groll; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CO2; carbon dioxide; refrigeration system; supermarket; cascade; indirect; trans-critical; modelling; simulation; experiment; safety analysis; comparison; Mechanical energy engineering; Mekanisk energiteknik;

    Abstract : This thesis theoretically and experimentally investigates different aspects of the application of CO2 in supermarket refrigeration. Theoretical analysis has been performed using computer simulation models developed to simulate CO2 indirect, NH3/CO2 cascade, CO2 trans-critical and direct expansion (DX) R404A systems. READ MORE

  4. 2. Experimental investigation of nozzle guide vanes in a sector of an annular cascade

    Author : Julien Roux; KTH; []
    Keywords : Turbomachinery; annular cascade test facilities; steady state; pressure measurements; aerodynamic probe calibration; coolant concentration; film cooling; secondary flow; kinetic energy losses;

    Abstract : .... READ MORE

  5. 3. Experimental investigation of gas turbine airfoil aerodynamic performance without and with film cooling in an annular sector cascade

    Author : Sven-Henrik Wiers; KTH; []
    Keywords : turbomachinery; linear and annular cascade test facilities; steady state; flow wisualizaiton; prossure measurement;

    Abstract : .... READ MORE

  6. 4. Sensitivity of Aeroelastic Properties of an Oscillating LPT Cascade

    Author : Nenad Glodic; Damian Vogt; Matthew Montgomery; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; flutter; aeroelastic response; combined modes; bending-torsion flutter; mode superposition; aerodynamic asymmetries; ROM; probabilistic analysis;

    Abstract : Modern turbomachinery design is characterized by a tendency towards thinner, lighter and highly loaded blades, which in turn gives rise to increased sensitivity to flow induced vibration such as flutter. Flutter is a self-excited and self-sustained instability phenomenon that may lead to structural failure due to High Cycle Fatigue (HCF) or material overload. READ MORE

  7. 5. 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