By measuring the extinction coefficient of visible light, the mean droplet size in steam fog of known dryness may be determined on the basis of light-scattering theory. A device comprising a continuous gas laser as the light source and a photomultiplier tube as the sensor is described together with experimental results obtained in low-pressure steam fogs. These were produced in Laval nozzles in one experiment, while in another experiment the fog in the exhaust casing of a model low-pressure steam turbine has been studied.
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References
1.
StodolaA.Dampf- und Gasturbinen1922, 5th edition (Springer, Berlin).
2.
YellotJ. I.HollandC. K.‘The condensation of flowing steam: Condensation in diverging nozzles’, Engineering, Lond.1937143, 647, 703.
3.
BinnieA. M.WoodsM. W.‘The pressure distribution in a convergent–divergent steam nozzle’, Proc. Instn mech. Engrs, London1938138 (Pt 1, No. 2), 229.
4.
BinnieA. M.GreenJ. R.‘An electrical detector of condensation in high-velocity steam’, Proc. R. Soc. London1943A181 (984), 134.
5.
GyarmathyG.MeyerH.‘Versuche über den Einfluss der Entspannungsschnelligkeit auf die Nebelbildung in übersättigtem Wasserdampf’, ForschHft. Ver. dt. Ing.1965 (Pt II, No. 508).
6.
OswatitschK.‘Kondensationserscheinungen in Ueberschalldüsen’, Z. angew. Math. Mech.194222 (1), 1.
7.
GardnerG. C.‘Events leading to erosion in the steam turbine’, Proc. Instn mech. Engrs1963–64178 (Pt 1, No. 23), 593.
8.
RyleyD. J.‘Review: The thermodynamic and mechanical interaction of water globules and steam in the wet steam turbine’, Int. J. mech. Sci.19624, 447.
9.
RyleyD. J.Bennett-CowellB. N.‘The collision behaviour of steam-borne water drops’, Int. J. mech. Sci.19679, 817.
10.
PouchotW. D. et al. ‘Analytical investigation of turbine erosion phenomena’, Rept WANL-PR-(DD)-014 (Vols I, II, III) 1966 (November) (Westinghouse Astronuclear Laboratory).
11.
VarljenT. C.‘The transport of atomized drops in wet vapor turbines’, Rept WANL-TME-18361968 (August) (Westinghouse Astronuclear Laboratory).
12.
BazarovS. M. et al. ‘Investigation of droplet size distribution at the outlet from the last stage of a steam turbine’, Thermal Engng196815 (10), 46.
13.
GrossmannG.NeubertJ.‘Strömungstechnische Untersuchungen an Modellendstufen und Entwässerungssystemen’, Trans. Inst. Fluid-Flow Machinery (Poland)1966 (29–31), 253.
14.
ThorpeA. D.WoodM. R.‘Coarse water distribution within the l.p. stages of a 350-MW steam turbine’, Thermodynamics and Fluid Mechanics Conv., Proc. Instn mech. Engrs1967–68182 (Pt 3H), 130.
15.
ChristieD. G. et al. ‘The formation of water drops which cause turbine blade erosion’, Thermodynamics and Fluid Mechanics Conv., Proc. Instn mech. Engrs1965–66180 (Pt 3O), 13.
16.
ToddK. W.GregoryB.‘An experiment on erosion control using a 60-MW steam turbine’, Thermodynamics and Fluid Mechanics Conv., Proc. Instn mech. Engrs1967–68182 (Pt 3H), 297.
17.
RyleyD. J.ParkerG. J.‘The removal of water from low-pressure steam turbine blades by trailing-edge suction slots’, Thermodynamics and Fluid Mechanics Conv., Proc. Instn mech. Engrs1967–68182 (Pt 3H), 94.
18.
McAllisterD. H.MooreC. T.‘Water drainage from a cascade of hollow slotted l.p. turbine blades’, Thermodynamics and Fluid Mechanics Conv., Proc. Instn mech. Engrs1968–69183.
19.
ŠkopekJ.‘Dynamic tests of hollow guide blades for turbine drainage’, SNTL Techn. Digest (Prague)1968X (2), 80.
20.
ValhaJ.‘Two-phase flow through blade cascades’ (in Russian), Trans. Inst. Fluid-Flow Machinery (Poland)1966 (29–31), 195.
21.
SterliniJ.‘Approche du problème des écoulements de vapeur humide’, Association Technique Maritime et Aéronautique (Paris), Session 1966.
22.
GyarmathyG.‘Bases for a theory for wet steam turbines’, Swiss Fed. Inst. Technol. (E.T.H.), Inst. of Thermal Turbomachines, Bulletin No. 6 1962. (English translations: C.E.G.B. Transl. T-781 and U.S.A.F. Foreign Technol. Division Rept No. FTD-TT-63–785.).
23.
ParkerG. J.‘The deposition of small water droplets on stationary l.p. steam turbine blades’, Annual Progress Rept1967 (Univ. Liverpool, Dept Mech. Engng).
24.
RyleyD. J.‘Condensation fogs in low pressure steam turbines’, Int. J. mech. Sci.19679, 729.
25.
ParkerG. J. Personal communication.
26.
KonorskiA.‘Dynamics of the thermodynamic processes in two-phase media’, Trans. Inst. Fluid-Flow Machinery (Poland)1968 (40), 37.
27.
SteinG. D.WegenerP. P.‘Experiments on the number of particles formed by homogeneous nucleation in the vapour phase’, J. Chem. Phys.196746 (9), 3685.
28.
FletcherE. C.GyarmathyG.HasingerS.‘Separation of submicron condensate particles in a vortex chamber’, Rept No. ARL 66–02181966 (November) (U.S.A.F. Aerospace Research Laboratories).
29.
RobertsR.‘A light-scattering investigation of droplet growth in nozzle condensation’, Rept No. 971969 (February) (MIT Gas Turbine Laboratory).
30.
Van de HulstH. C.Light scattering by small particles1957 (Wiley, New York).
31.
WinklerE. M.‘Condensation study by absorption or scattering of light’, in Physical measurements in gas dynamics and combustion1954 (Princeton Univ. Press).
32.
GyarmathyG.‘Ein analytisches Berechnungsverfahren für spontane Kondensationsvorgänge’, ForschHft. Ver. dt Ing.1965 (Pt I, No. 508).
33.
GardzilewiczA.KrólT.‘An attempt to determine liquid phase dispersion in condensing steam from the measurements of light attenuation’, Trans. Inst. Fluid-Flow Machinery (Poland)1968 (40), 23.
