During the course of expansion in turbines steam nucleates to become a two-phase mixture consisting of a very large number of extremely small droplets carried by the vapour. Turbine stages operating in a two-phase regime have a lower efficiency than those working on superheated steam. To reproduce turbine two-phase flow conditions realistically requires a supply of supercooled steam which can be generated under blow-down conditions by the equipment employed. To generate wet steam the supercooled steam can be passed through a venturi. This paper is one of a set describing an investigation of the performance of a cascade of turbine rotor tip section profiles in wet steam and is concerned with the generation of a supply of wet steam of prescribed droplet sizes for admission to the cascade.
HallerB. R.UnsworthR. G.WaltersP. T.LordM. J.Wetness measurements in a model multistage low pressure steam turbine. In Proceedings of BNES Conference on Technology of Turbine Plant Operating with Wet Steam (Eds MitchellJ. M.), Conference In Proceedings, 1989, pp. 137–145 (British Nuclear Energy Society, London).
2.
KreitmeierF.SchlachterW.SmutnyJ.An investigation of flow in a low pressure wet steam model turbine and its use for determining wetness losses. In Proceedings of IMechE Conference on Steam Turbines for the 1980s, Conference Publications, 1979, Vol. 12, pp. 385–395 (Mechanical Engineering Publications, London).
3.
TanumaT.SakamotoT.The removal of water from steam turbine stationary blades by suction slots. In Proceedings of IMechE Conference on Turbomachinery: Latest Developments in a Changing Scene, Conference Publications, 1991, Vol. 3, paper C423/022, pp. 179–189 (Mechanical Engineering Publications, London).
4.
SteltzW. G.LeeP. K.LindsayW. T.The verification of concentrated impurities in low pressure steam turbines. In Aerothermodynamics of Steam Turbines (Eds SteltzW. G.DonaldsonA.M.), ASME Winter Annual Meeting, Washington, 1981, pp. 73–82 (American Society of Mechanical Engineers, New York).
5.
KleitzA.LaaliA. R.CourantJ. J.Fog droplet size measurement and calculation in wet strain turbines. In Proceedings of BNES Conference on Technology of Turbine Plant Operating with Wet Steam (Eds MitchellJ.M.), Conference Proceedings, 1989, pp. 177–182 (British Nuclear Energy Society, London).
6.
FallickL.HopkinsonM.JacksonA. B.Some aspects of low pressure steam turbine flow path design and analysis. In Proceedings of IMechE Conference on Steam Turbines for the 1980s, Conference Publications, 1979, Vol. 12, pp. 253–280 (Mechanical Engineering Publications, London).
7.
StastnyM.Structure of secondary liquid phase downstream of moving blades in LP cylinder stages of steam turbines. In Proceedings of IMechE Conference on Steam Turbines for the 1980s, Conference Publications, 1979, Vol. 12, pp. 371–384 (Mechanical Engineering Publications, London).
8.
WaltersP. T.Wetness and efficiency measurements in LP turbines with an optical probe as an aid to improving performance. ASME paper 85-JPGC-GT-9, 1985.
9.
BarbucciP.CarboneC.DonatiniF.MazzocchiL.VergaM.Steam turbine flow field and steam quality measurements. In International Joint Power Generation Conference on The Steam Turbine Generator Today: Materials Flow Path Design Repair and Refurbishment, ASME Power Division Publication PWR, Vol. 21, 1993, pp. 129–135 (American Society of Mechanical Engineers, New York).
10.
YoshidaK.MasuzawaC.KishimotoM.Development of measuring techniques and measurement on wet steam for steam turbine. In International Joint Power Generation Conference on Advances in Steam Turbine Technology for Power Generation, ASME Power Division Publication PWR, Vol. 10, 1990, pp. 237–244 (American Society of Mechanical Engineers, New York).
11.
BakhtarF.WebbR. A.Shojaee-FardM. H.SirajM. A.An experimental facility for studies of nucleating and wet steam flows in turbine blading. In Proceedings of IMechE Conference on Turbomachinery: Latest Developments in a Changing Scene Conference Publications, 1991, Vol. 3, paper C423/003, pp. 191–199 (Mechanical Engineering Publications, London).
12.
BakhtarF.WebbR. A.Shojaee-FardM. H.SirajM. A.An investigation of nucleating flows of steam in a cascade of turbine blading. Trans. ASME, J. Fluids Engng, 1993, 115, 128–134.
13.
BakhtarF.EbrahimiM.WebbR. A.An investigation of nucleating flows of steam in a cascade of turbine blading—wake traverses. Trans. ASME, J. Fluids Engng, 1994, 116, 121–127.
14.
BakhtarF.AbbasK. K.MahpeykarM. R.An investigation of nucleating flows of steam in a cascade of turbine blading—theoretical treatment. Trans. ASME, J. Fluids Engng, 1995, 117, 138–144.
15.
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.
16.
BakhtarF.EbrahimiM.BomkoleB. O.On the performance of a cascade of turbine rotor tip section blading in nucleating steam. Part 2: Wake traverses. Proc. Instn Mech. Engrs, Part C, 1995, 209(C3), 169–177.
17.
BakhtarF.MahpeykarM. R.On the performance of a cascade of rotor tip section blading in nucleating steam. Part 3: Theoretical treatment. Proc. Instn Mech. Engrs, Part C, 1997, 211(C3), 195–210.
18.
BakhtarF.ZidiK.Nucleation phenomena in flowing high pressure steam. Part 2: Theoretical analysis. Proc. Instn Mech. Engrs, Part A, 1990, 204(A4), 233–242.
19.
YoungJ. B.BakhtarF.A comparison between theoretical calculations and experimental measurements of droplet sizes in nucleating steam flows. In Transactions of Institute of Fluid Flow Machinery, 1974, pp. 70–72 (Gdansk, Poland).
