Implementation and Validation of a FEM Through-Flow Program Computing the Meridional Flow in Axial Turbines
Tong, Ling (2011) Implementation and Validation of a FEM Through-Flow Program Computing the Meridional Flow in Axial Turbines. Diploma, DLR, Institut für Antriebstechnik.
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The turbine department of the DLR Institute of Propulsion Technology will use a through-flow program, which is based on a classical through-flow method using a stream function approach and a finite element solution procedure And it can be applied to calculate axisymmetric flow fields and predict the performance of axial gas turbines at subsonic conditions. In this diploma thesis, the program was thoroughly analyzed in three areas: the aerodynamic model, the numerical methods and the loss models. Based on the algorithm of the old program, the program was rewritten in FORTRAN 95 using advanced programming techniques. To test the new program, calculations were carried out for two turbines: a single-stage and a 4-stage experimental air turbine. The results of the flow field calculations were presented. The turbine overall performance was predicted, as well as for partial load. The new implementation of the program was validated by comparing the results with experimental measurement data and the results of the old FEMT program. In comparison with the old program, accuracy of the results were optimized and improved.
|Document Type:||Thesis (Diploma)|
|Title:||Implementation and Validation of a FEM Through-Flow Program Computing the Meridional Flow in Axial Turbines|
|Number of Pages:||72|
|Keywords:||turbine, through-flow, finite element method, loss model, performance analysis, S2m stream surface|
|Institution:||DLR, Institut für Antriebstechnik|
|HGF - Research field:||Energy, Aeronautics, Space and Transport|
|HGF - Program:||Aeronautics, Efficient Energy Conversion|
|HGF - Program Themes:||L ER - Engine Research, L AR - Aircraft Research, E VG - Combustion and Gas Turbine Technologies|
|DLR - Research area:||Energy, Aeronautics|
|DLR - Program:||L ER - Engine Research, L AR - Aircraft Research, E VG - Combustion and Gas Turbine Technologies|
|DLR - Research theme (Project):||L - Simulation & Validation, E - Gasturbine (old), L - Turbine Technologies|
|Institutes and Institutions:||Institute of Propulsion Technology > Turbine|
|Deposited By:||Clemens Buske|
|Deposited On:||14 Mar 2011 11:13|
|Last Modified:||14 Mar 2011 11:13|
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