Page 292 - Fluid Mechanics and Thermodynamics of Turbomachinery

Radial Flow Gas Turbines 273
Jamieson, A. W. H. (1955). The radial turbine. Chapter 9 in Gas Turbine Principles and
Practice (Sir H. Roxbee-Cox, ed.). Newnes.
Kearton, W. J. (1951). Steam turbine theory and practice. (6th edn). Pitman.
Kofskey, M. G. and Nusbaum, W. J. (1972). Effects of specific speed on experimental perfor-
mance of a radial-inflow turbine. NASA TN D-6605.
Kofskey, M. G. and Wasserbauer, C. A. (1966). Experimental performance evaluation of a
radial inflow turbine over a range of specific speeds. NASA TN D-3742.
Meitner, P. L. and Glassman, A. J. (1983). Computer code for off-design performance anal-
ysis of radial-inflow turbines with rotor blade sweep. NASA TP 2199, AVRADCOM Tech.
Report 83-C-4.
Metzger, D. E. and Mitchell, J. W. (1966). Heat transfer from a shrouded rotating disc with
film cooling. J. Heat Transfer, Trans. Am. Soc. Mech Engrs, 88.
Nusbaum, W. J. and Kofskey, M. G. (1969). Cold performance evaluation of 4.97 inch
radial-inflow turbine designed for single-shaft Brayton cycle space-power system. NASA
TN D-5090.
Rodgers, C. (1969). A cycle analysis technique for small gas turbines. Technical Advances
in Gas Turbine Design. Proc. Instn. Mech. Engrs. London, 183,Pt3N.
Rodgers, C. and Geiser, R. (1987). Performance of a high-efficiency radial/axial turbine. J.
of Turbomachinery, Trans. Am. Soc. Mech. Engrs., 109.
Roelke, R. J. (1973). Miscellaneous losses. Chapter 8 in Turbine Design and Applications
(A.J. Glassman, ed.) NASA SP 290, Vol. 2.
Rogers, G. F. C. and Mayhew, Y. R. (1995). Thermodynamic and Transport Properties of
Fluids (5th edn). Blackwell.
Rohlik, H. E. (1968). Analytical determination of radial-inflow turbine design geometry for
maximum efficiency. NASA TN D-4384.
Rohlik, H. E. (1975). Radial-inflow turbines. In Turbine Design and Applications. (A. J.
Glassman, ed.). NASA SP 290, vol. 3.
Shepherd, D. G. (1956). Principles of Turbomachinery. Macmillan.
Stanitz, J. D. (1952). Some theoretical aerodynamic investigations of impellers in radial and
mixed flow centrifugal compressors. Trans. Am. Soc. Mech. Engrs., 74,4.
Stewart, W. L., Witney, W. J. and Wong, R. Y. (1960). A study of boundary layer charac-
teristics of turbomachine blade rows and their relation to overall blade loss. J. Basic Eng.,
Trans. Am. Soc. Mech. Engrs., 82.
Whitfield, A. (1990). The preliminary design of radial inflow turbines. J. Turbomachinery,
Trans. Am. Soc. Mech. Engrs., 112,50 57.
Whitfield, A. & Baines, N. C. (1990). Computation of internal flows. Chapter 8 in Design
of Radial Turbomachines. Longman.
Wilson, D. G. and Jansen, W. (1965). The aerodynamic and thermodynamic design of cryo-
genic radial-inflow expanders. ASME Paper 65 WA/PID-6, 1 13.
Wood, H. J. (1963). Current technology of radial-inflow turbines for compressible fluids. J.
Eng. Power., Trans. Am. Soc. Mech. Engrs., 85.

Problems
1. A small inward radial flow gas turbine, comprising a ring of nozzle blades, a radial-
vaned rotor and an axial diffuser, operates at the nominal design point with a total-to-total
efficiency of 0.90. At turbine entry the stagnation pressure and temperature of the gas is
400 kPa and 1,140 K. The flow leaving the turbine is diffused to a pressure of 100 kPa and
has negligible final velocity. Given that the flow is just choked at nozzle exit, determine the
impeller peripheral speed and the flow outlet angle from the nozzles.
For the gas assume
D 1.333 and R D 287 J/(kg ° C).