0
TECHNICAL PAPERS

Separation Control on Low-Pressure Turbine Airfoils Using Synthetic Vortex Generator Jets

[+] Author and Article Information
Ralph J. Volino

Department of Mechanical Engineering, United States Naval Academy, Annapolis, MD 21402e-mail: volino@usna.edu

J. Turbomach 125(4), 765-777 (Dec 01, 2003) (13 pages) doi:10.1115/1.1626686 History: Received December 01, 2002; Revised March 01, 2003; Online December 01, 2003
Copyright © 2003 by ASME
Your Session has timed out. Please sign back in to continue.

References

Hourmouziadis, J., 1989, “Aerodynamic Design of Low Pressure Turbines,” AGARD Lecture Series 167.
Mayle,  R. E., 1991, “The Role of Laminar-Turbulent Transition in Gas Turbine Engines,” ASME J. Turbomach., 113, pp. 509–537.
Sharma, O. P., Ni, R. H., and Tanrikut, S., 1994, “Unsteady Flow in Turbines,” AGARD Lecture Series 195, Paper No. 5.
Volino,  R. J., 2002, “Separated Flow Transition Under Simulated Low-Pressure Turbine Airfoil Conditions: Part 1—Mean Flow and Turbulence Statistics,” ASME J. Turbomach., 124, pp. 645–655.
Volino,  R. J., 2003, “Passive Flow Control on Low-Pressure Turbine Airfoils,” ASME J. Turbomach., 125, pp. 754–764.
Howell,  R. J., Ramesh,  O. N., Hodson,  H. P., Harvey,  N. W., and Schulte,  V., 2001, “High Lift and Aft-Loaded Profiles for Low-Pressure Turbines,” ASME J. Turbomach., 123, pp. 181–188.
Gad-el-Hak, M., 2000, Flow Control, Passive, Active, and Reactive Flow Management, Cambridge University Press, Cambridge.
Lake, J. P., King, P. I., and Rivir, R. B., 2000, “Low Reynolds Number Loss Reduction on Turbine Blades With Dimples and V-Grooves,” AIAA Paper 00-738.
Van Treuren,  K. W., Simon,  T., von Koller,  M., Byerley,  A. R., Baughn,  J. W., and Rivir,  R., 2001, “Measurements in a Turbine Cascade Flow Under Ultra Low Reynolds Number Conditions,” ASME J. Turbomach., 124, pp. 100–106.
Lee,  J., Sloan,  M. L., and Paynter,  G. C., 1994, “Lag Model for Turbulent Boundary Layers Over Rough Bleed Surfaces,” J. Propul. Power, 10, pp. 562–568.
Sturm,  W., Schcugenpflug,  H., and Fottner,  L., 1992, “Performance Improvements of Compressor Cascades by Controlling the Profile and Sidewall Boundary Layers,” ASME J. Turbomach., 114, pp. 477–486.
Johnston,  J. P., and Nishi,  M., 1990, “Vortex Generator Jets. Means for Flow Separation Control,” AIAA J., 28, pp. 989–994.
Compton,  D. A., and Johnston,  J. P., 1992, “Streamwise Vortex Production by Pitched and Skewed Jets in a Turbulent Boundary Layer,” AIAA J., 30, pp. 640–647.
McManus, K., Legner, H., and Davis, S., 1994, “Pulsed Vortex Generator Jets for Active Control of Flow Separation,” AIAA Paper 94-2218.
Raghunathan, S., Watterson, J., Cooper, R., and Lee, S., 1999, “Short Wide Angle Diffuser With Pulse Jet Control,” AIAA Paper 99-0280.
Sinha,  S. K., and Pal,  D., 1993, “Optimizing the Use of Acoustic Perturbation to Control Unsteady Boundary Layer Separation,” FED (Am. Soc. Mech. Eng.), 157, pp. 253–263.
Jacobson,  S. A., and Reynolds,  W. C., 1998, “Active Control of Streamwise Vortices and Streaks in Boundary Layers,” J. Fluid Mech., 360, pp. 179–211.
Miau,  J. J., Lee,  K. C., Chen,  M. H., and Chou,  J. H., 1991, “Control of Separated Flow by a Two-Dimensional Oscillating Fence,” AIAA J., 29, pp. 1140–1148.
Sinha,  S. K., Pal,  D., and Banerjee,  D., 1996, “Control of Flow Separation Using the EMEMS Approach: Proof of Concept Experiments,” DSC (Am. Soc. Mech. Eng.), 59, pp. 253–263.
Whitehead,  L. A., Graham,  D. J., Moore,  F. A., Bolleman,  B. J., Lake,  R., and Dunwoody,  A. B., 1996, “Investigation of Boundary Layer Flow Separation Control by Airfoil Surface Vibration,” Can. Aeronautics Space J., 42, pp. 213–219.
Amitay,  M., and Glezer,  A., 2002, “Role of Actuation Frequency in Controlled Flow Reattachment Over a Stalled Airfoil,” AIAA J., 40, pp. 209–216.
Huang,  J., Corke,  T. C., and Thomas,  F. O., 2002, “Separation Control Over Low Pressure Turbine Blades,” Bull. Am. Phys. Soc., DFD2002, 47(10), p. 167.
Hultgren,  L. S., and Ashpis,  D. E., 2002, “Glow Discharge Plasma Active Control of Separation at Low Pressure Turbine Conditions,” Bull. Am. Phys. Soc., DFD2002, 47(10), pp. 167–168.
Bons,  J. P., Sondergaard,  R., and Rivir,  R. B., 2001, “Turbine Separation Control Using Pulsed Vortex Generator Jets,” ASME J. Turbomach., 123, pp. 198–206.
Bons,  J. P., Sondergaard,  R., and Rivir,  R. B., 2002, “The Fluid Dynamics of LPT Blade Separation Control Using Pulsed Jets,” ASME J. Turbomach., 124, pp. 77–85.
Gostelow,  J. P., Walker,  G. J., Solomon,  W. J., Hong,  G., and Melwani,  N., 1997, “Investigation of the Calmed Region Behind a Turbulent Spot,” ASME J. Turbomach., 119, pp. 802–809.
Schulte,  V., and Hodson,  H. P., 1998, “Prediction of the Becalmed Region for LP Turbine Profile Design,” ASME J. Turbomach., 120, pp. 839–846.
Volino,  R. J., 2002, “Separated Flow Transition Under Simulated Low-Pressure Turbine Airfoil Conditions: Part 2—Turbulence Spectra,” ASME J. Turbomach., 124, pp. 656–664.
Volino,  R. J., Schultz,  M. P., and Pratt,  C. M., 2001, “Conditional Sampling in a Transitional Boundary Layer Under High Free-Stream Turbulence Conditions,” ASME J. Fluids Eng., 125, pp. 28–37.
Wills,  J. A. B., 1962, “The Correction of Hot-Wire Readings for Proximity to a Solid Boundary,” J. Fluid Mech., 12, pp. 65–92.
Volino,  R. J., and Simon,  T. W., 1997, “Velocity and Temperature Profiles in Turbulent Boundary Layers Experiencing Streamwise Pressure Gradients,” ASME J. Heat Transfer, 119, pp. 433–439.
Ligrani,  P. M., and Bradshaw,  P., 1987, “Spatial Resolution and Measurement of Turbulence in the Viscous Sublayer Using Subminiature Hot-Wire Probes,” Exp. Fluids, 5, pp. 407–417.
Schlichting, H., 1979, Boundary Layer Theory, 7th ed. McGraw-Hill, New York.
Kaszeta, R. W., Simon, T. W., and Ashpis, D. E., 2001, “Experimental Investigation of Transition to Turbulence as Affected by Passing Wakes,” ASME Paper 2001-GT-195.
Seifert,  A., and Pack,  L. G., 1999, “Oscillatory Control of Separation at High Reynolds Numbers,” AIAA J., 37, pp. 1062–1071.

Figures

Grahic Jump Location
Schematic of the test section
Grahic Jump Location
Drawing of suction side airfoil with cavity and VGJ’s: (a) full airfoil, (b) cross section of VGJ holes
Grahic Jump Location
Time trace of jet velocity and speaker input voltage, F+=0.65
Grahic Jump Location
Cp profiles, F+=0.65, various blowing ratios
Grahic Jump Location
Cp profiles, Bmax≈5, various F+
Grahic Jump Location
Cp profiles, comparison of baseline, passive bar, and present jet case with Bmax=4.7 and F+=0.65
Grahic Jump Location
Station 7–11 dimensionless time averaged profiles; comparison of baseline, passive bar and present jet cases: (a) mean velocity, (b) ū, (c) turbulent shear stress
Grahic Jump Location
Time averaged shape factor and momentum thickness verses streamwise location; comparison of baseline, passive bar and present jet cases: (a) H, (b) θ
Grahic Jump Location
Ensemble averaged dimensionless mean velocity (Ũ/Ue) profiles
Grahic Jump Location
Ensemble averaged rms value of dimensionless streamwise fluctuating velocity (ũ/Ue) profiles
Grahic Jump Location
Ensemble averaged dimensionless turbulent shear stress (−ũ/Ue2) profiles
Grahic Jump Location
Time-space plot of ensemble averaged ũ/Ue at y/Ls=0.0004
Grahic Jump Location
Time-space plot of ensemble averaged −ũ/Ue2 at y/Ls=0.0128
Grahic Jump Location
Time-space plot of ensemble averaged dimensionless free-stream velocity Ũ/Ue
Grahic Jump Location
Time-space plot of ensemble averaged Thwaites acceleration parameter λθ
Grahic Jump Location
Time-space plot of ensemble averaged momentum thickness θ in mm
Grahic Jump Location
Time-space plot of ensemble averaged shape factor H
Grahic Jump Location
Time-space plot of ensemble averaged skin friction coefficient Ct; white areas with dots indicate separated flow

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