A trailing edge cooled low aspect ratio transonic turbine guide vane is investigated in the VKI Compression Tube Cascade Facility at an outlet Mach number M2, is = 1.05 and a coolant flow rate m˙c/m˙g = 3 percent. The outlet flow field is surveyed by combined total-directional pressure probes and temperature probes. Special emphasis is put on the development of low blockage probes. Additional information is provided by oil flow visualizations and numerical flow visualizations with a three-dimensional Navier–Stokes code. The test results describe the strong differences in the axial evolution of the hub and tip endwall and secondary flows and demonstrate the self-similarity of the midspan wake profiles. According to the total pressure and temperature profiles, the wake mixing appears to be very fast in the near-wake but very slow in the far-wake region. The total pressure wake profile appears to be little affected by the coolant flow ejection.

Issue Section:
Research Papers
Topics:
Flow (Dynamics), Nozzle guide vanes, Turbines, Wakes, Pressure, Probes, Coolants, Flow visualization, Cascades (Fluid dynamics), Compression, Guide vanes, Mach number, Temperature, Temperature profiles
1.
Binder
A.
, and
Romey
R.
,
1983
, “
Secondary Flow Effects and Mixing of the Wake Behind a Turbine Stator
,”
ASME Journal of Engineering for Power
, Vol.
105
, pp.
40
–
46
.
2.
Dejc, M. E., and Trojanovskij, B. M., 1973, “Untersuchung und Berechnung Axialer Turbinenstufen,” VEB Verlag Technik, Berlin.
3.
Depolt, Th., Vinnemaier, F., and Koschel, W., 1990, “Investigation on Minimizing Blockage Effects of Multi-hole Pressure Probes in Transonic Flow,” Proc. of 10th Symp. on Measuring Techniques for Transonic and Supersonic Flows in Cascades and Turbomachines, VKI.
4.
Dominy, R. G., and Harding, S. G., 1989, “An Investigation of Secondary Flows in Nozzle Guide Vanes,” AGARD CP 469.
5.
Harasgama, S. P., and Chana, K. S., 1990, “Turbine Nozzle Guide Vane Exit Area Traversing in a Short Duration Light Piston Test Facility,” Proc. of 10th Symp. on Measuring Techniques for Transonic and Supersonic Flows in Cascades and Turbomachines, VKI.
6.
Kapteijn, C., Amecke, J., and Michelassi, V., 1994, “Aerodynamic Performance of a Transonic Turbine Guide Vane With Trailing Edge Coolant Ejection,” ASME Paper No. 94-GT-288 to be published in the ASME JOURNAL OF TURBOMACHINERY, Vol. 118, July 1996.
7.
Moss, R. W., and Oldfield, M. L. G., 1990, “Comparison Between Turbulence Spectra Measured With Fast Response Pressure Probes and Hot Wires,” Proc. of the 10th Symp. on Measuring Techniques for Transonic and Supersonic Flows in Cascades and Turbomachines, VKI.
8.
Ng, W., and Epstein, A., 1983, “High Frequency Temperature and Pressure Probe for Unsteady Compressible Flow,” Review of Scientific Instruments, Vol. 54, No. 12.
9.
Rohlik, H. E., Kofokey, M. G., Allen, H. W., and Herzig, H. Z., 1954, “Secondary Flows and Boundary Layer Accumulations in Turbine Nozzles,” NACA TR 1168.
10.
Ruck, G., and Stetter, H., 1990, “Unsteady Velocity and Turbulence Measurements With a Fast Response Probe,” ASME Paper No. 90-GT-232.
11.
Schaub
U. W.
,
Williamson
R. G.
,
Huot
J. P.
, and
Moustapha
S. H.
,
1990
, “
An Experimental Assessment of the Influence of Downstream Conditions on the Performance of a Transonic Turbine Nozzle of High Turning
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
112
, pp.
286
–
293
.
12.
Sharma
O. P.
,
Pickett
G. F.
, and
Ni
R. H.
,
1992
, “
Assessment of Unsteady Flows in Turbines
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
114
, No.
1
, pp.
79
–
90
.
13.
Sieverding, C. H., van Hove, W., and Boletis, E., 1984, “Experimental Study of the Three-Dimensional Flow Field in an Annular Turbine Nozzle Guide Vane,” ASME Journal of Engineering for Gas Turbines and Power, Vol. 106, No. 2.
14.
Sieverding, C. H., 1985, “Aerodynamic Development of Axial Turbomachinery Blading—Testing Techniques and Steady State Performance Measurements,” in: Thermodynamics and Fluid Mechanics of Turbomachinery, NATO ASI Series E, No. 97A, Nijhoff.
15.
Sieverding, C. H., Arts, T., and Pasteels, H., 1988, “Transonic Cascade Performance Measurements Using a High Speed Probe Traversing Mechanism in a Short Duration Wind Tunnel,” Proc. 9th Symp. on Measuring Techniques for Transonic and Supersonic Flow in Cascades and Turbomachines, Oxford.
16.
Sieverding, C. H., and Arts, T., 1992, “The VKI Compression Tube Annular Cascade Facility,” ASME Paper No. 92-GT-336.
17.
Williamson, R. G., and Moustapha, S. H., 1986, “Annular Cascade Testing of Turbine Nozzles at High Exit Mach Numbers,” ASME Journal of Fluid Engineering, Vol. 108.
18.
Yamamoto, A., and Yanagi, R., 1985, “Production and Development of Secondary Flows and Losses Within a Three Dimensional Turbine Stator Cascade,” ASME Paper No. 85-GT-217.
This content is only available via PDF.
Copyright © 1996
 by The American Society of Mechanical Engineers
You do not currently have access to this content.