Analysis of Aerodynamic and Thermodynamic Behavior of Turbines at Off-Design Geometry Conditions

Betreuer: Dipl.-Ing. F. del Angel Vicente

General Objective

The objective of the thesis is to determine the power losses of turbines due to the influence of geometry variations in comparison with the original flow path.

Particular Objectives

  • Experimental determination of the aerodynamic and thermodynamic behavior of the turbine when the design geometry has suffered changes, and the effect on the efficiency and the output power drop.
  • Analyze the influence of changes on the blade surface roughness and wearing of blade system on the aero-thermodynamic behavior of the turbine.
  • Make the analysis of the flow behavior with the influence of geometry variations in relation to the original flow path, through a 3D-CFD computation.

This work is carried out on numerical and experimental fields. In the experimental analysis, the flow behavior in a turbine test rig is investigated with pneumatic pressure probes as well as multi sensor hot wire probes. The results will be used in the numerical analysis for the verification of flow calculations with the program code "TASCFLOW".

  • Numerical Analysis

    • Determination of the optimum flow conditions for the experimental analysis.
    • Analysis of the flow behavior for different blade profiles.
    • Flow calculations in the same experimental conditions of the turbine test rig.

  • Experimental Analysis

    • Analysis of flow behavior in a turbine test rig.
    • Manufacture of deteriorated blades, with changes on the blade surface roughness and wearing of blade system.
    • Analysis of the flow path with different deteriorated blades.

  • Comparison of numerical and experimental results

    • The results of both experimental and numerical analysis will be applied for their verification.