A description is given of a theoretical treatment of nucleation in flowing steam employing an equation of state based on the second virial coefficient. Comparison is made with experimental observations of reversion in the pressure range 2–35 bars of steam in a convergent-divergent nozzle of expansion rate P = 104 s-1. The agreement obtained is moderate.
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References
1.
TubmanK.A.“High pressure steam research plant at the University of Liverpool”. Plant Engineer, 18, 4, 21st April, 1974.
2.
RyleyD.J.TubmanK.A.“Spontaneous condensation in high-pressure expanding steam”. Polish Academy of Sciences (In press).
3.
OswatitschK.“Kondensationsercheinungen in Überschalldüsen”. Z. Angew. Math. u. Mech., 1942, 22, (No. 1), p.1.
4.
WegenerP.P.“Gas dynamics of expansion flows with condensation and homogeneous nucleation of water vapour”. Gas Dynamics, Vol. 1, Pt. 1, ed. WegenerP. P., Marcel Deckker, N.Y., 1969.
5.
GyarmathyG.“Bases for a theory for wet steam turbines”. Bull. 6, Inst. for Thermal Turbo-machines, Federal Technical University, Zürich, 1962.
6.
HillP.G.“Condensation of water vapour during supersonic expansion in nozzles”. J. Fluid Mech.1966, 25 (Pt. 3), p.593.
7.
CampbellB.A.BakhtarF.“Condensation phenomena in high-speed flow of steam”. Proc. Instn.Mech.Engrs., 1970–71, 185, 25/71, p.395.
8.
BarschdorffD.“Verlauf der Zuslandsgrossen und gasdynamische zusammenhäge bei der spontanen Kondensation reinen wasserdampfer in Lavaldlisen”. Forsch. Ing-Wes.1971, 37, No. 5, 146.
9.
MooreM.J.WaltersP.T.CraneR.I.DavidsonB.J.“Predicting the fog-drop size in wet steam turbines”. Instn. of Mech.Engrs. Conference on heat and fluid flow in steam and gas turbine plant. Univ. of Warwick, April 3–5, 1973, Paper C37/73, p.101.
10.
YousifF.H.BakhtarF.“Behaviour of wet steam after disruption by a shock wave”. 1974, Proc. Inst. Chem. Engrs. Symp. Series No. 38, paper G.3.
11.
CourtneyW.G.“Remarks on homogeneous nucleation”. J.Chem.Phys.1961, 35, p.2249.
12.
KantrowitzA.“Nucleation in very rapid vapour expansions”. J.Chem.Phys., 1951, 19, p.1097.
13.
PlummerP.L.M.HaleB.N.“Molecular model for pre-nucleation water clusters”. 1972, J.Chem.Phys., 56, 9, 4329.
14.
DollinF.“Investigation of steam turbine nozzle and blading efficiency”. Proc.Instn.Mech.Engrs., 1940, 144, p.147.
15.
SmithA. Private Communication.
16.
PuzyrewskiR.“High and low pressure effects in the gas dynamics of condensing vapours”. Bull: Polish Academy of Sciences, 1973, 21, 10, p.83.
17.
GyarmathyG.BurkhardH-P.LeschF.SiegenthalerA.“Spontaneous condensation of steam at high pressure”. Instn.Mech.Engrs. Conference on heat and fluid flow in steam and gas turbine plant, Univ. of Warwick, April 3–5, 1973, Paper C66/73, p.182.
18.
DeichM.E.TsiklauriG.V.ShaninV.K.DanilinV.S.“Investigation of flow of wet steam in nozzles”. High Temp., 1972, 10, 1, p.102.
19.
KeenanJ.H.KeyesF.G.HillP.G.MooreJ.G.“Steam Tables”John Wiley and Sons, 1969.
20.
Proceedings of the Sixth International Conference on the Properties of Steam. Oct. 1963.Issued by ASME, New York.
DeichM.E.‘Calculation of the rate of formation of condensation nuclei in supercooled steam’, Izv. Akad. Nauk Uzbek SSR, Energetika Transport1968, No.2, 34.
23.
PetrV.Measurement of an average size and number of droplets during spontaneous condensation of saturated steam, Proc. Instn. mech. Engrs1969–70, 184 (pt 3 G), Vol.111, 22.
24.
WegenerP.P.Comments on a paper by Campbell and Batchtar, Heat and Fluid Flow3, 51 (1973). Proc. Instn. Mech. Engrs., 187, 13 (1973).
25.
GyamarthyG.Written discussion on papers presented at the Conference sponsored by the Heat and Fluid Flow Group of the Instn. Mech. Engrs. University of Warwick, 3–5th April, 1973. Wet Steam 4, CP7 1974, 65.
26.
YoungJ.B.BakhtarF.‘A comparison between theoretical calculations and experimental measurements of droplet sizes in nucleating flows’. Proc Conf. on Steam Turbines of Great Output, Gdansk, Sept. 74, Trans. Inst. Fluid Flow Machinery70–72 Pol. Ac. Sc. 1976.
27.
FederJ.RussellK.C.LotheJ.PoundG.‘Homogeneous nucleation and growth of droplets in vapours’. Adv. Phys.1966, 15 (suppl. Phil. Mag.) 111.
28.
BakhtarF.GhoneimZ.YoungJ.B.‘A Study of Nucleating and Wet Steam Flows in Turbines’. Proc. Instn. mech. Engrs.1976, 190, 545.
