The flow field in a preswirled cooling air supply to a turbine rotor has been investigated by means of CFD simulations. Coefficients for system efficiency are derived. The influences of various geometric parameters for different configurations have been correlated with the help of appropriate coefficients. For some of the most important geometric parameters of the coverplate receiver, design recommendations have been made. For the preswirl nozzles, the potential of efficiency improvement by contour design is highlighted.

Issue Section:
Research Papers
Topics:
Computational fluid dynamics, Flow (Dynamics), Design, Cooling, Nozzles, Rotors, Simulation, System efficiency, Turbines
1.
Callaghan, E. E., and Bowden, D. T., 1947, “Investigation of Flow Coefficient of Circular, Square and Elliptical Orifices at High Pressure Ratios,” NACA Technical Note.
2.
El-Oun
J. B.
, and
Owen
J. M.
,
1989
, “
Preswirl Blade Cooling Effectiveness in an Adiabatic Rotor-Stator System
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
111
, pp.
522
–
529
.
3.
Giralt, F., Chu-Jun, C., and Trass, O., 1977, “Characterization of the Impingement Region in an Axisymmetric Turbulent Jet,” Industrial Engineering Chemicals, Fundamentals, Vol. 16.
4.
Kreitmeier, F., 1992, “Space-Averaging 3D Flows Using Strictly Formulated Balance Equations in Turbomachinery,” ASME IGTI Vol. 7.
5.
Kutz
K. J.
, and
Speer
T. M.
,
1994
, “
Simulation of the Secondary Air System of Aero Engines
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
116
, pp.
306
–
315
.
6.
Meierhofer, B., and Franklin, C. J., 1981, “An Investigation of a Preswirled Cooling Airflow to a Turbine Disc by Measuring the Air Temperature in the Rotating Channels,” ASME Paper No. 81-GT-132.
7.
Raw, M. J., Galpin, P. F., and Hutchinson B. R., 1989, “A Colocated Finite Volume Method for Solving the Navier–Stokes Equations for Incompressible and Compressible Flows in Turbomachinery,” Proc. Annual General Meeting of the Canadian Aeronautics and Space Institute.
8.
Wilson
M.
, and
Owen
J. M.
,
1997
, “
Flow and Heat Transfer in a Preswirl Rotor-Stator System
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
119
, pp.
364
–
373
.
9.
Zimmermann
H.
,
1990
, “
Some Aerodynamic Aspects of Engine Secondary Air Systems
,”
ASME Journal of Engineering for Gas Turbines and Power
, Vol.
112
, pp.
223
–
228
.
This content is only available via PDF.
Copyright © 1998
 by The American Society of Mechanical Engineers
You do not currently have access to this content.