Turbine component film cooling is most effective when using a continuous slot to introduce coolant to the surface. However, this is not practical due to the structural weakness that would be inherent with a continuous slot. In this study, several slotlike designs are investigated to establish the film cooling effectiveness. These slot configurations extended only a partial distance through the simulated turbine vane wall and were fed with impinging cylindrical holes. The configurations were studied on the suction side of a scaled-up turbine vane. In this study, varying slot widths, discrete and continuous slots, and diffusing the coolant flow within the slot prior to it being emitted onto the surface of the vane were investigated. Rows of discrete round and shaped holes were also tested for comparison with the slots. The study of varying slot geometries showed that decreasing the width of the slots led to a substantial increase in adiabatic effectiveness. An internal coolant diffusion technique showed promise by maintaining performance levels while potentially providing a design configuration that more readily meets structural demands in real-world operating conditions. The coolant flow characteristics were also studied through the use of thermal profiles measurements. These thermal profiles showed minimal mainstream ingestion on the top surface of the slot prior to the coolant emitting onto the surface of the vane.
Skip Nav Destination
Article navigation
July 2011
Research Papers
Practical Slot Configurations for Turbine Film Cooling Applications
Joshua E. Bruce-Black,
Joshua E. Bruce-Black
University of Texas at Austin
, Austin, TX 78712
Search for other works by this author on:
Frederick T. Davidson,
Frederick T. Davidson
University of Texas at Austin
, Austin, TX 78712
Search for other works by this author on:
David G. Bogard,
David G. Bogard
University of Texas at Austin
, Austin, TX 78712
Search for other works by this author on:
David R. Johns
David R. Johns
GE Energy
, Greenville, SC 29615
Search for other works by this author on:
Joshua E. Bruce-Black
University of Texas at Austin
, Austin, TX 78712
Frederick T. Davidson
University of Texas at Austin
, Austin, TX 78712
David G. Bogard
University of Texas at Austin
, Austin, TX 78712
David R. Johns
GE Energy
, Greenville, SC 29615J. Turbomach. Jul 2011, 133(3): 031020 (8 pages)
Published Online: November 29, 2010
Article history
Received:
October 2, 2009
Revised:
January 18, 2010
Online:
November 29, 2010
Published:
November 29, 2010
Citation
Bruce-Black, J. E., Davidson, F. T., Bogard, D. G., and Johns, D. R. (November 29, 2010). "Practical Slot Configurations for Turbine Film Cooling Applications." ASME. J. Turbomach. July 2011; 133(3): 031020. https://doi.org/10.1115/1.4002413
Download citation file:
Get Email Alerts
Related Articles
Leading-Edge Film-Cooling Physics—Part III: Diffused Hole Effectiveness
J. Turbomach (April,2003)
Estimating the Loss Associated With Film Cooling for a Turbine Stage
J. Turbomach (March,2012)
Effect of Film Cooling on Turbine Capacity
J. Eng. Gas Turbines Power (January,2010)
Film Cooling
Effectiveness and Heat Transfer Near Deposit-Laden Film
Holes
J. Turbomach (July,2011)
Related Proceedings Papers
Related Chapters
Control and Operational Performance
Closed-Cycle Gas Turbines: Operating Experience and Future Potential
Thermodynamic Performance
Closed-Cycle Gas Turbines: Operating Experience and Future Potential
EVALUATION OF THERMAL PROBE COOLING EFFECT BASED ON PIPELINE PARALLEL OPTICAL CABLE
Pipeline Integrity Management Under Geohazard Conditions (PIMG)