The interaction of a convected wake with a compressor blade boundary layer was investigated. Measurements within a single-stage compressor were made using an endoscopic PIV system, a surface mounted pressure transducer, hotfilms and hotwire traverses, along with CFD simulations. The wake/leading-edge interaction was shown to lead to the formation of a thickened laminar boundary-layer, within which turbulent spots formed close to the leading edge. The thickened boundary-layer became turbulent and propagated down the blade surface, giving rise to pressure perturbations of 7% of the inlet dynamic head in magnitude. The results indicate that wake/leading-edge interactions have a crucial role to play in the performance of compressor blades in the presence of wakes.
Issue Section:
Research Papers
1.
Mayle
, R. E.
, 1991, “The Role of Laminar-Turbulent Transition in Gas Turbine Engines
,” ASME J. Turbomach.
0889-504X, 113
, pp. 509
–537
.2.
Walker
, G. J.
, 1993, “The Role of Laminar-Turbulent Transition in Gas Turbine Engines: A Discussion
.” ASME J. Turbomach.
0889-504X, 115
(2
), pp. 207
–218
.3.
Cumpsty
, N. A.
, Dong
, Y.
, and Li
, Y. S.
, 1995, “Compressor Blade Boundary Layers in the Presence of Wakes
.” ASME Paper No. 95-GT-443.4.
Dong
, Y.
, and Cumpsty
, N. A.
, 1990, “Compressor Blade Boundary Layers: Part 1—Test Facility and Measurements With No Incident Wakes
,” ASME J. Turbomach.
0889-504X, 112
, pp. 222
–230
.5.
Dong
, Y.
, and Cumpsty
, N. A.
, 1990, “Compressor Blade Boundary Layers: Part 2—Measurements With Incident Wakes
,” ASME J. Turbomach.
0889-504X, 112
, pp. 231
–240
.6.
Halstead
, D. E.
, Wisler
, D. C.
, Okiishi
, T. H.
, Walker
, G. J.
, Hodson
, H. P.
, and Shin
, H. W.
, 1997, “Boundary Layer Development in Axial Compressors and Turbines: Part 1 of 4—Composite Picture
,” ASME J. Turbomach.
0889-504X, 119
, pp. 114
–119
.7.
Hughes
, J. D.
, and Walker
, G. J.
, 2001, “Natural Transition Phenomena on an Axial Compressor Blade
,” ASME J. Turbomach.
0889-504X, 123
, pp. 392
–401
.8.
Solomon
, W. J.
, and Walker
, G. J.
, 2000, “Incidence Effects on Wake-Induced Transition on an Axial Compressor Blade
,” J. Propul. Power
0748-4658, 16
(3
), pp. 397
–405
.9.
Hodson
, H. P.
, and Howell
, R. J.
, 2005, “The Role of Transition in High-Lift Low-Pressure Turbines for Aero-Engines
,” Prog. Aerosp. Sci.
0376-0421, 41
, pp. 419
–454
.10.
Howell
, R. J.
, Hodson
, H. P.
, Schulte
, V.
, Schiffer
, H. P.
, Haselbach
, F.
, and Harvey
, N. W.
, 2001, “Boundary-Layer Development in the BR710 and BR715LP Turbines—The Implementation of High Lift and Ultra High Lift Concepts
,” ASME Paper No. 2001-GT-0441.11.
Dong
, Y.
, 1988, “Boundary Layers on Compressor Blades
,” Ph.D. thesis, University of Cambridge, UK.12.
Ottavy
, X.
, Vilmin
, S.
, Hodson
, H.
, and Gallimore
, S.
, 2004, “The Effects of Wake-Passing Unsteadiness Over a Highly Loaded Compressor-Like Flat Plate
,” ASME J. Turbomach.
0889-504X, 126
, pp. 13
–23
.13.
Mailach
, R.
, and Vogeler
, K.
, 2004, “Aerodynamic Blade Row Interactions in an Axial Compressor—Part 1: Unsteady Boundary-Layer Development
,” ASME J. Turbomach.
0889-504X, 126
, pp. 35
–44
.14.
Bolger
, J. J.
, 1999, “Three-Dimensional Design of Compressor Blades
.” Ph.D. thesis, University of Cambridge, UK.15.
Bindon
, J. P.
, 1987, “Pressure Distributions in the Tip Clearance Region of an Unshrouded Axial Turbine as Affecting the Problem of Tip Burnout
,” ASME Paper No. 87-GT–230.16.
Hodson
, H. P.
, Huntsman
, I.
, and Steele
, A. B.
, 1994, “An Investigation of Boundary-Layer Development in a Multistage LP Turbine
,” ASME J. Turbomach.
0889-504X, 116
, pp. 375
–383
.17.
Giles
, M.
, 1991, “Unsflo: A Numerical Method for the Calculation of Unsteady Flow in Turbomachinery
,” Tech. Report No. 205, GTL.18.
Walraevens
, R. E.
, and Cumpsty
, N. A.
, 1995, “Leading Edge Separation Bubbles on Turbomachinery Blades
,” ASME J. Turbomach.
0889-504X, 117
, pp. 115
–125
.19.
Paxson
, D. E.
, and Mayle
, R. E.
, 1991, “Laminar Boundarylayer Interaction With an Unsteady Passing Wake
,” ASME J. Turbomach.
0889-504X, 113
, pp. 419
–427
.20.
Lighthill
, M. J.
, 1954, “The Response of Laminar Skin Friction and Heat Transfer to Fluctuations in the Freestream Velocity
,” Proc. R. Soc. London, Ser. A
1364-5021, 224
, pp. 1
–23
.21.
Meyer
, R. X.
, 1958, “The Effect of Wakes on the Transient Pressure and Velocity Distributions in Turbomachines
,” Trans. ASME
0097-6822, 80
, pp. 1545
–1552
.Copyright © 2007
by American Society of Mechanical Engineers
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