Abstract
This report gives a brief account of ABB`s flutter project in its first year. The reader is alerted to the interim nature of this report, which covers the period from January 1990 thru December 1990. The project was begun a year ago and is scheduled to be completed by the end of 1991. The ultimate objective of this project is to provide a numerical tool for the prediction of flutter in turbomachinery blading. In order to predict flutter several ingredients are needed, including a structural method to compute the natural frequencies and mode shapes of the blades, and aerodynamic methods to compute both the steady loads and the unsteady loads due to blade vibration. This project is mainly concerned with the development of an unsteady flow solver and work so far was mostly directed toward that goal. The proposed method is tailored according to ABB`s needs with emphasis on economy and reliability. To this end a linearized Euler approach is adopted, in which the flow is decomposed into a steady component and a small unsteady perturbation. While this still allows to fully account for the effects of blade geometry, steady blade loading, shocks and the inherent entropy changes, this approach
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Krainer, A
[1]
- ABB Turbo Systems, Baden (CH)
Citation Formats
Krainer, A.
Development of a computer code for the design of flutter-free turbomachinery blading; Entwicklung eines Rechenverfahrens zur Auslegung von flatterfreien Turbomaschinenschaufeln.
Switzerland: N. p.,
1991.
Web.
Krainer, A.
Development of a computer code for the design of flutter-free turbomachinery blading; Entwicklung eines Rechenverfahrens zur Auslegung von flatterfreien Turbomaschinenschaufeln.
Switzerland.
Krainer, A.
1991.
"Development of a computer code for the design of flutter-free turbomachinery blading; Entwicklung eines Rechenverfahrens zur Auslegung von flatterfreien Turbomaschinenschaufeln."
Switzerland.
@misc{etde_10152852,
title = {Development of a computer code for the design of flutter-free turbomachinery blading; Entwicklung eines Rechenverfahrens zur Auslegung von flatterfreien Turbomaschinenschaufeln}
author = {Krainer, A}
abstractNote = {This report gives a brief account of ABB`s flutter project in its first year. The reader is alerted to the interim nature of this report, which covers the period from January 1990 thru December 1990. The project was begun a year ago and is scheduled to be completed by the end of 1991. The ultimate objective of this project is to provide a numerical tool for the prediction of flutter in turbomachinery blading. In order to predict flutter several ingredients are needed, including a structural method to compute the natural frequencies and mode shapes of the blades, and aerodynamic methods to compute both the steady loads and the unsteady loads due to blade vibration. This project is mainly concerned with the development of an unsteady flow solver and work so far was mostly directed toward that goal. The proposed method is tailored according to ABB`s needs with emphasis on economy and reliability. To this end a linearized Euler approach is adopted, in which the flow is decomposed into a steady component and a small unsteady perturbation. While this still allows to fully account for the effects of blade geometry, steady blade loading, shocks and the inherent entropy changes, this approach also offers the efficiency, which makes it useful for engineering application. As of December 1990 a 1-D test-code has been completed and development of the 2-D/3-D code is well underway. Based on the good agreement of our 1-D results with other methods, the proposed approach was considered feasible and suitable to be extended to multi-dimensions. First 2-D results have been obtained, but it is too premature to assess the capabilities of the 2-D/3-D code. In addition to more rigorous testing, the yet open question as to the numerical treatment of flow discontinuities needs to be addressed before the current method can be successfully used in a flutter analysis. (author)}
place = {Switzerland}
year = {1991}
month = {Jan}
}
title = {Development of a computer code for the design of flutter-free turbomachinery blading; Entwicklung eines Rechenverfahrens zur Auslegung von flatterfreien Turbomaschinenschaufeln}
author = {Krainer, A}
abstractNote = {This report gives a brief account of ABB`s flutter project in its first year. The reader is alerted to the interim nature of this report, which covers the period from January 1990 thru December 1990. The project was begun a year ago and is scheduled to be completed by the end of 1991. The ultimate objective of this project is to provide a numerical tool for the prediction of flutter in turbomachinery blading. In order to predict flutter several ingredients are needed, including a structural method to compute the natural frequencies and mode shapes of the blades, and aerodynamic methods to compute both the steady loads and the unsteady loads due to blade vibration. This project is mainly concerned with the development of an unsteady flow solver and work so far was mostly directed toward that goal. The proposed method is tailored according to ABB`s needs with emphasis on economy and reliability. To this end a linearized Euler approach is adopted, in which the flow is decomposed into a steady component and a small unsteady perturbation. While this still allows to fully account for the effects of blade geometry, steady blade loading, shocks and the inherent entropy changes, this approach also offers the efficiency, which makes it useful for engineering application. As of December 1990 a 1-D test-code has been completed and development of the 2-D/3-D code is well underway. Based on the good agreement of our 1-D results with other methods, the proposed approach was considered feasible and suitable to be extended to multi-dimensions. First 2-D results have been obtained, but it is too premature to assess the capabilities of the 2-D/3-D code. In addition to more rigorous testing, the yet open question as to the numerical treatment of flow discontinuities needs to be addressed before the current method can be successfully used in a flutter analysis. (author)}
place = {Switzerland}
year = {1991}
month = {Jan}
}