An Experimental and Theoretical Â£ Investigation of Annular Steam ...

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- 38 - last two sections, the andel is extended so that adiabatic and diabatic fil* flow and burnout in annul!
- 39 - Here the dimensionless velocity u, is: u, = u,/uj , (4.4) where u,(m/s) is the velocity in the film and uj(m/s) is the shear velocity: u l = S\A>1 ' (4 ' 5) related to the dimensionless wall distance y : y + = yu*/v x (4.6) where y(m) is the distance from the wall: y = r 2 - r. (4.7) The two-layer model is given by (cf. Schlichting (1968)): + u l y y y£ r (turbulent) (4 * 8) where ic is von K&rm&n's constant: K = 0.4. (4.9) The value corresponding to smooth tubes is chosen for the roughness function B: B » 5.5. (4.10) The transition between the laminar and the turbulent regions is assumed to take place at: y£ r - 11.5. (4.11) Prom the velocity profile, the interfacial velocity, i.e. the velocity at the film surface, u^m/s), is derived:
Page 1 and 2: i Risø Report No. 372 8. c* 5 Ris
Page 3 and 4: April 1978 Ris# Report No. 372 An E
Page 5 and 6: CONTENTS Page Introduction . 5 Annu
Page 7 and 8: - 5 - 1. INTRODUCTION Power generat
Page 9 and 10: - 7 - tated by the gas stream. Thus
Page 11 and 12: - 9 - a one-component flow (e.g. st
Page 13 and 14: Table 2.1. Fila Flow Meaaureawnta w
Page 15 and 16: - 13 - Most of these measurements a
Page 17 and 18: - 15 - Table 3.1 Propertics of Stea
Page 19 and 20: - 17 - connected in parallel and eq
Page 21 and 22: - 19 - To eliminate bubbles of stea
Page 23 and 24: - 21 - x «„4- = -ér-^ - -f- 1 (
Page 25 and 26: - 23 - The time spent on determinin
Page 27 and 28: Tabic 3.2. Summary of th« Experime
Page 29 and 30: - 27 - crement of .he difference wh
Page 31 and 32: - 29 - Q^UOO^-Q (10°C) Q fAT .) =
Page 33 and 34: - 31 - difference in hydrostatic he
Page 35 and 36: - 33 - (3.30) can be used to estima
Page 37 and 38: - 35 - interval between 50 and 70 b
Page 39: - 37 - The values of X obtained are
Page 43 and 44: - 41 - value exceeds the theoretica
Page 45 and 46: - 43 - tions calculated from the Ba
Page 47 and 48: - 45 - Tabl* 4.1 Constants in eq.(4
Page 49 and 50: - 47 - be demonstrated by compariso
Page 51 and 52: - 49 - 4.2.2. Entrainment and Depos
Page 53 and 54: - 51 - kg/m s is an incorrect inter
Page 55 and 56: - 53 - 2 diction of Q D _ for p = 9
Page 57 and 58: - 55 - The interfacial shear stress
Page 59 and 60: - 57 - u . = 2TT 91 i • v r ij (r
Page 61 and 62: - 59 - ship on the entrainment rate
Page 63 and 64: - 61 - The main reason for this ins
Page 65 and 66: - 63 - 4,3.5. Predictions of Data A
Page 67 and 68: - 65 - 4.4.4. Predictions of Data F
Page 69 and 70: - 67 - the diabatic film flow is in
Page 71 and 72: - 69 - NOMENCLATURE Main Symbols A
Page 73 and 74: - 71 - u* V v w v t X x c f s y y D
Page 75 and 76: - 73 - REFERENCES Andersen, P.S. (1
Page 77 and 78: - 75 - Friedel, L. (1977). Mean voi
Page 79 and 80: - 77 - Little, R.B. (1970). Dryout
Page 81 and 82: - 79 - APPENDIX Tables Page Al. Fil
Page 83 and 84: - 81 - Table A.2. Film Flow Measure
Page 85 and 86: - • ; - . - 83 - Table A3. File F
Page 87 and 88: - 85 - Tabla M. ril« riow nuuinatM
Page 89 and 90: - 87 - Table A«. Ftla Flow Moaeure
Page 91 and 92:
- 89 - Takl« Alt) (ceatiaaatl. rnn
Page 93 and 94:
- 91 - Table AU. Pressure Drop Meas
Page 95 and 96:
- 93 - Takl* AI«. ktcMW HMaor« T*
Page 97 and 98:
- 95 - Tabla »IS. aaaauraaaat* of
Page 99 and 100:
Steam Burnout Locus Single-Phase St
Page 101 and 102:
From the outlet of the test j. sect
Page 103 and 104:
- 101 - / / r r •— Si »var Rod
Page 105 and 106:
- 103 - Inlot Fløng« rig. 3.S. Tu
Page 107 and 108:
- 105 - O ***** • r Saw g* the Sc
Page 109 and 110:
- 107 - no T | I I I I o G* 500 kgA
Page 111 and 112:
1 - 109 - -i 1 r i | I T ' 9 "• 1
Page 113 and 114:
- Ill - & G= 1000 kg/m*s aG=200O
Page 115 and 116:
- 113 - so no 150 q-|V»W] 200 Pig.
Page 117 and 118:
- 115 - WO no, F r T r --• i •
Page 119 and 120:
- 117 - 50 40 • 1 t i i r o A O O
Page 121 and 122:
- 119 - r T i ri J 1 1—i i i i i
Page 123 and 124:
- 121 - «£JN 0.02 x oul = 20% 6 =
Page 125 and 126:
- 123 - 400 300 v p = 30 bor o p =
Page 127 and 128:
- 125 - .• - --- - i » i m i l r
Page 129 and 130:
- 127 - 2.0 v p=30 bor/fcst Section
Page 131 and 132:
- 129 - C » T » '— \ o\ \ \ •
Page 133 and 134:
i il 20 ~ I- 6 t i« N TJ GL •D *
Page 135 and 136:
- 133 - i G-- WOO hgnrnV U- L02m i
Page 137 and 138:
Fig. 4.22. Comparison between Measu
Page 139 and 140:
- 137 100 Ol 1 i cfG= 400kg/m 2 s o
Page 141 and 142:
..39 tt> k ' ' •- — I ——i i
Page 143 and 144:
J. 4 X — XX) i 1 1 r i 1 1 1 r- I
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