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3D Flutter Analysis of Space Turbines
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.
2012 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The trend in gas turbine engines towards lighter and more efficient design is increasing. Due to high costs the necessity for good tools in early stages of the design process is therefore tremendous. Especially in the preliminary design flutter simulation is performed in 2D to get fast results. The fast evaluation of new designs, including profile and disk variation, is the driving component in the field.

The project deals with the development of a method to assess space turbines for flutter susceptibility in 3D. Several parameterized scripts have been created to perform a complete flutter analysis. The ability of performing a modal analysis of the model is herein a key parameter.

The method is tested on two turbines of a space engine for seven operating points respectively and compared to the 2D simulation. A profile variation is then performed to find an indicator how to stabilize one of the turbines.

The results of the method are in good agreement with 2D computation. The fast implementation and analysis of different blade profiles is proven. When comparing different blade profiles designed for the same duty, a significant difference in flutter characteristics appears. The results suggest a further, more detailed study on the influence of blade shape variation on the flutter susceptibility.

Place, publisher, year, edition, pages
2012. , 97 p.
Keyword [en]
Turbomachinery, Space Turbine, Flutter
National Category
Mechanical Engineering
URN: urn:nbn:se:kth:diva-106979OAI: diva2:574284
Educational program
Master of Science - Turbomachinery Aeromechanic University Training
2012-11-02, M263, Brinellvägen 68, Stockholm, 10:18 (English)
Available from: 2013-06-24 Created: 2012-12-05 Last updated: 2013-06-24Bibliographically approved

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