H. Yang
Experimental study on linear compressor cascade with three-dimensional blade oscillation
Yang, H.; He, L.
Authors
L. He
Abstract
An experiment is carried out to enhance the understanding of three-dimensional blade aeroelastic mechanisms and to produce test data for validation of numerical methods. A compressor cascade test rig developed consists of seven prismatic controlled diffusion blades with the middle blade being oscillated in a three-dimensional bending/flapping mode. Steady and unsteady pressure measurements are performed at six spanwise sections for three reduced frequencies and two tip-clearance gaps. Off-board pressure transducers are utilized with a transfer-function method correcting tubing errors. The tuned cascade results are constructed by using the influence coefficient method. The results illustrate fully three-dimensional unsteady behaviour. The blades are aeroelastically destabilized as the tip gap is increased, and the destabilizing effect of the tip-clearance influences most of the span. The total aerodynamic damping at the least stable interblade phase angle is reduced by 27% when the tip gap is increased from nearly 0 to 2% span.
Citation
Yang, H., & He, L. (2004). Experimental study on linear compressor cascade with three-dimensional blade oscillation. Journal of Propulsion and Power, 20(1), 180-188
Journal Article Type | Article |
---|---|
Publication Date | 2004-01 |
Deposit Date | Mar 11, 2009 |
Journal | Journal of Propulsion and Power |
Print ISSN | 0748-4658 |
Publisher | American Institute of Aeronautics and Astronautics |
Peer Reviewed | Peer Reviewed |
Volume | 20 |
Issue | 1 |
Pages | 180-188 |
Keywords | Unsteady-flow, Tip clearance, Performance, Stability, Velocity, Passage, Stall. |
Publisher URL | http://www.aiaa.org/content.cfm?pageid=318 |
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