During the course of expansion of steam in turbines the fluid first supercools and then nucleates to become a two-phase mixture. To reproduce turbine two-phase flow conditions requires a supply of supercooled vapour which can be achieved under blow-down conditions by the equipment employed. This paper is the second of a set describing an investigation into the performance of a cascade of rotor tip section profiles in nucleating steam and presents the results of the wake traverses and droplet measurements.
BakhtarF.WebbR. A.Shojaee-FardM. H.SirajM.An experimental facility for studies of nucleating and wet steam flow in turbine blading. Proceedings of IMechE European Conference on Turbomachinery, 1991, paper C423–003, pp. 191–199 (Mechanical Engineering Publications, London).
2.
BakhtarF.EbrahimiM.WebbR. A.On the performance of a cascade of turbine rotor tip section blading in nucleating steam. Part 1: Surface pressure distributions. Proc. Instn Mech. Engrs Part C, 1995, 209(C2), 115–124.
3.
CoxH. J. A.Experimental development of bladings for large steam turbines. Lecture Series on Steam turbines for large power outputs 1980–6, Ch. 6, Von Karman Institute for Fluid Dynamics.
4.
BakhtarF.EbrahimiM.WebbR. A.An investigation of nucleating flows of steam in a cascade of turbine blading—wake traverses. Trans. ASME Fluids Engng, 1994, 116, 121–127.
5.
GyarmathyG.LeschF.Fog droplet observations in laval nozzles and in an experimental turbine. Proc. Instn Mech. Engrs, 1970, 184(3G), 88–95.
6.
PetrV.Measurement of an average size and number of droplets during spontaneous condensation of supersaturated steam. Proc. Instn Mech. Engrs, 1970, 184(3G), 73–79.
7.
WaltersP. T.Improving the accuracy of wetness measurements in generating turbines by using a new procedure for analysing optical transmission data. Proceedings of Conference on Technology of turbine plant operating with wet steam, London, 1988, pp. 183–192 (British Nuclear Energy Society, London).
8.
KleitzA.LaaliA. R.CourantJ. J.Fog droplet size measurement and calculation in wet steam turbines. Proceedings of Conference on Technology of turbine plant operating with wet steam, London, 1988, pp. 177–182 (British Nuclear Energy Society, London).
9.
TatsunoK.NagaoS.Water droplet size measurements in an experimental steam turbine using an optical fiber droplet sizer. Trans. ASME J. Heat Transfer, 1986, 108, 939–945.
10.
KrolT.Results of optical measurements of diameters of drops formed due to condensation of steam in a de-laval nozzle (in Polish). Prace IMP 571971.
11.
BakhtarF.SirajM. A.BamkoleB. O.WebbR. A.EbrahimiM.A study of nucleating and wet steam flows in a cascade of turbine blading—droplet measurements. Proceedings of ASME Fluid Engineering Conference on Cavitation and multiphase flow forum (Ed. FuruyaO.), Los Angeles, 1992, paper FED 135, pp. 167–170 (American Society of Mechanical Engineers, New York).
12.
PendorfR. B.New table of total mie scattering coefficients for spherical particles of real refractive indices. J. Opt. Soc. Am., 1957, 47, 1010–1015.
