0
TECHNICAL PAPERS

Separation Bubbles Under Steady and Periodic-Unsteady Main Flow Conditions

[+] Author and Article Information
Weiliang Lou, Jean Hourmouziadis

Jet Propulsion Laboratory, Aerospace Institute F1, Berlin University of Technology, Marchstr. 12, D-10587 Berlin, Germany

J. Turbomach 122(4), 634-643 (Feb 01, 2000) (10 pages) doi:10.1115/1.1308568 History: Received February 01, 2000
Copyright © 2000 by ASME
Your Session has timed out. Please sign back in to continue.

References

Hodson, H. P., 1991, “Aspect of Unsteady Blade-Surface Boundary Layers and Transition in Axial Turbomachines,” VKI Lecture Series 1991-06, Boundary Layers in Turbomachines, Sept. 2–6.
Hourmouziadis, J., 1989, “Aerodynamic Design of Low Pressure Turbines,” AGARD Lecture Series 167.
Walker,  G. J., 1993, “The Role of Laminar–Turbulent Transition in Gas Turbine Engines: A Discussion,” ASME J. Turbomach., 115, pp. 207–217.
Mayle,  R. E., 1991, “The Role of Laminar–Turbulent Transition in Gas Turbine Engines,” ASME J. Turbomach., 113, pp. 509–537.
Gault, D. E., 1955, “An Experimental Investigation of Regions of Separated Laminar Flow,” NACA TN 3505.
Gaster, M., 1969, “The Structure and Behavior of Laminar Separation Bubbles,” Aeronautical Research Council, R&M 3595.
Horton, H. P., 1969, “A Semi-Empirical Theory for the Growth and Bursting of Laminar Separation Bubbles,” Aeronautical Research Council, C.P. No. 1073.
Malkiel,  E., and Mayle,  R. E., 1996, “Transition in a Separation Bubble,” ASME J. Turbomach., 118, pp. 752–759.
Roberts,  W. B., 1975, “The Effect of Reynolds Number and Laminar Separation on Axial Cascade Performance,” ASME J. Eng. Power, 97, pp. 261–274.
Hatman, A., and Wang, T., 1998, “Separated-Flow Transition: Parts 1 to 3,” ASME Paper Nos. 98-GT-461/462/463.
Dong,  Y., and Cumpsty,  N. A., 1990, “Compressor Blade Boundary Layers: Parts 1 and 2,” ASME J. Turbomach., 112, pp. 222–240.
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— Composite Picture; Part 2—Compressor; Part 3—LP Turbines; Part 4—Computations and Analysis,” ASME J. Turbomach., 119, pp. 114–126; 119, 426–444; 119, 225–237; 119, 128–139.
Miller,  J. A., Fejer,  A. A., 1964, “Transition Phenomena in Oscillating Boundary Layer Flows,” J. Fluid Mech., 18, pp. 438–449.
Obremski,  H. J., and Fejer,  A. A., 1967, “Transition in Oscillating Boundary Layer Flows,” J. Fluid Mech., 29, pp. 93–111.
Lou, W., and Hourmouziadis, J., 1999, “Experimental Investigation of Periodic-Unsteady Flat Plate Boundary Layers With Pressure Gradients,” Proc. 3rd ASME/JSME Joint Fluids Engineering Division Summer Meeting, Paper No. FEDSM99-7190.
Stratford,  B. S., 1959, “The Prediction of Separation of the Turbulent Boundary Layer,” J. Fluid Mech., 5, pp. 1–16.
Hourmouziadis, J., 1990, “Selected Unresolved Problems in Turbomachinery Aerodynamics,” presented at ASME/IGTI Fluid Dynamics of Turbomachinery, Iowa State University, Ames, IA, 13–23 Aug.
Thwaites, B., 1949, “Approximate Calculation of the Laminar Boundary Layer,” Aeronaut. Q., 245–280.
Bellows,  W. J., and Mayle,  R. E., 1986, “Heat Transfer Downstream of a Leading Edge Separation Bubble,” ASME J. Turbomach., 108, pp. 131–136.
Lin, C. C, 1957, “Motion in the Boundary Layer With a Rapidly Oscillating External Flow,” Proc. 9th Int. Congress Appl. Mech., 4 , pp. 155–167.

Figures

Grahic Jump Location
Reynolds number effects on performance of a turbine cascade 2
Grahic Jump Location
Rotor/stator interaction of a turbine stage
Grahic Jump Location
Periodic-unsteady low-speed wind tunnel
Grahic Jump Location
Velocity distribution over the flat plate
Grahic Jump Location
Velocity field around the separation bubble
Grahic Jump Location
Velocity power spectra along the line of inflection points in the velocity profiles
Grahic Jump Location
Boundary layer thicknesses and shape factor
Grahic Jump Location
Separation bubble size of the four test cases
Grahic Jump Location
Reynolds number based on the length from separation to transition as a function of the momentum thickness Reynolds number at separation point
Grahic Jump Location
Incoming flow signal of the periodic-unsteady boundary layer
Grahic Jump Location
Time-averaged velocity profiles and typical velocity signals of the periodic-unsteady boundary layer
Grahic Jump Location
Velocity power spectra along the inflection point line in the time-averaged velocity profiles
Grahic Jump Location
Normalized ensemble-averaged mean velocity field
Grahic Jump Location
Normalized ensemble-averaged rms velocity field
Grahic Jump Location
Oscillation characteristic of the separation bubble
Grahic Jump Location
Time-space diagram of the separation, transition, and reattachment (Re=54,500,Sr=0.89,A=13 percent)

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In