Author:
Vomáčko Václav,Šidlof Petr,Šimurda David,Pustka Martin
Abstract
AbstractFlutter of turbine and compressor blades represents a serious problem for designers of large turbomachines. In real machines, measurements of flutter conditions are hardly possible. Therefore, tests on linear blade cascades with movable blades play important role in investigations of flutter. In the current research, a simple blade cascade for controlled flutter testing was developed. The blades in this test rig undergo high-frequency oscillations which induce inertial forces. The influence of the elastic deformation of the blade on the flow field is studied in this work by means of experiments and numerical simulations. First, the computational and experimental modal analysis was done to obtain eigenfrequencies and modal damping. The deformed shape of the blade due to high-frequency oscillation was acquired by structural transient analysis. The influence of the elastic deformation on the flow field was then studied by CFD analysis for two incidence angles both for the deformed (elastic) and undeformed (idealized rigid) blade. Flow field was only very weakly distorted due to the blade elastic deformation. The total torque induced by aerodynamic and inertial forces was evaluated. The inertial loading is an order of magnitude larger than loading due to fluid flow.
Publisher
Springer Science and Business Media LLC
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics
Reference26 articles.
1. Holzinger F, Wartzek F, Jüngst M, Schiffer H-P, Leichtfuss S (2016) Self-excited blade vibration experimentally investigated in transonic compressors: Rotating instabilities and flutter. J Turbomach. https://doi.org/10.1115/1.4032163
2. Stapelfeldt S, Brandstetter C (2020) Non-synchronous vibration in axial compressors: lock-in mechanism and semi-analytical model. J Sound Vib 488:115649. https://doi.org/10.1016/j.jsv.2020.115649
3. Ferria H (2011) Contribution to numerical and experimental studies of flutter in space turbines. aerodynamic analysis of subsonic or supersonic flows in response to a prescribed vibratory mode of the structure. Ph.D. thesis, Ecole Centrale de Lyon
4. Půst L, Pešek L, Byrtus M (2018) Modelling of flutter running waves in turbine blades cascade. J Sound Vib 436:286–294. https://doi.org/10.1016/j.jsv.2018.08.011
5. Chen B, Zhang Z, Hua X, Nielsen SRK, Basu B (2018) Enhancement of flutter stability in wind turbines with a new type of passive damper of torsional rotation of blades. J Wind Eng Ind Aerodyn 173:171–179. https://doi.org/10.1016/j.jweia.2017.12.011
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献